SPC Jun 9, 2025 0600 UTC Day 1 Convective Outlook

3 months ago
SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1254 AM CDT Mon Jun 09 2025 Valid 091200Z - 101200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TODAY ACROSS PARTS OF THE OHIO AND LOWER MISSISSIPPI VALLEYS INTO THE APPALACHIANS AND SOUTH ATLANTIC SEABOARD,...AS WELL PARTS OF NORTHEASTERN NEW MEXICO... ...SUMMARY... Scattered strong to severe thunderstorm development appears probable today, particularly across parts of the Ohio Valley into Appalachians, and east of the lower Mississippi Valley into eastern Gulf Coast states. ...Discussion... It appears that mid/upper ridging inland of the Pacific coast through the western Canadian Prairies and northern U.S. Rockies is beginning to become suppressed by a short wave perturbation. As this continues, a seasonably deep downstream trough, currently still digging through the northern Great Plains/Upper Midwest vicinity, is forecast to pivot east-northeastward across the Great Lakes and Ohio Valley, gradually taking on a negative tilt as it does. An initially broad, modest associated surface cyclone may deepen some, mainly across northern Ontario into the James Bay vicinity, with at least a couple of reinforcing surges of cooler air overspreading the Great Lakes region, Ohio and Mississippi Valleys. Within a belt of more modest cyclonic mid/upper flow in latitudes to the east of the southern Rockies, at least one notable meso-beta to meso-alpha scale cyclonic circulation appears to be in the process of developing near the Ark-La-Tex vicinity. It appears that this circulation will tend to migrate east-northeastward across and to the east of the lower Mississippi Valley during the day. However, the extent to which it is maintained or becomes sheared, as larger-scale troughing within the two branches of westerlies tends to come in phase, remains unclear based on latest model output. Upstream, weak mid-level troughing is forecast to dig inland of the southern California coast, through the Southwest, around the northeastern periphery of a prominent mid-level high over the subtropical eastern Pacific. Seasonably moist air appears likely to remain largely confined to a remnant frontal zone across the southern tier of the U.S., associated with the modest southern mid- and subtropical westerlies. However, a narrow plume of southerly return flow is ongoing ahead of the lead reinforcing cold front now advancing southeast of the upper Great Lakes and Midwest. ...Lower Mississippi Valley into south Atlantic Seaboard... Potential convective evolution remains unclear, but guidance remains suggestive that ongoing convective development propagating across northeastern and north central Texas will be in the process of weakening while spreading into Louisiana and upper Texas coastal areas early in the period. Additional convection is also likely to be ongoing downstream of the emerging mesoscale vortex, aided by low-level warm advection, as it migrates east of the Mississippi Valley. The impact of this convection on boundary-layer destabilization remains unclear. However, while mid-level lapse rates may be weak, with at least some insolation, boundary-layer dew points in excess of 70 F across the Gulf Coast region may contribute to sufficient destabilization to support at least scattered intensifying thunderstorm development, both upstream and downstream of the convective vortex. Some of this activity may pose a risk for, mainly, strong surface gusts. A brief tornado also might be possible, particularly near the convective vortex as long as it remains relatively well-defined. This severe risk may continue into the south Atlantic Seaboard tonight, but this remains more unclear. ...Ohio Valley into Appalachians... Moderate boundary-layer destabilization ahead of the lead cold front might provide support for scattered strong to severe thunderstorm development, including supercells, in the presence of strong deep-layer shear beneath 40-60+ kt southwesterly mid/upper flow. Toward mid to late afternoon, it is possible that modestly deepening surface troughing across the upper Ohio Valley into the lee of the Allegheny front may provide a better defined focus for this threat. ...Great Lakes vicinity... Convection-allowing model output and associated guidance suggest that destabilization and shear may become supportive of convection capable of producing severe hail and wind in a narrow corridor ahead of a secondary surface cold front (closer to the mid-level cold core overspreading the Great Lakes), as it advances across and east-southeast of Lake Michigan this afternoon. ...Southern Rockies through northwestern Gulf coast... Extensive convective outflow appears likely to be progressing into and through the upper Texas coastal plain by the beginning of the period, and perhaps gradually stalling across parts of south central Texas into the Pecos Valley. The gust front might still be a focus for widely scattered strong thunderstorm development early in the day, otherwise the extent of the outflow's stabilizing influence remains unclear, particularly later in period to the lee of the southern Rockies. Downstream of the Southwestern mid-level tough, models suggest that destabilizing, moist upslope flow into the Raton Mesa/eastern slopes of the Sangre de Cristo Mountains might become supportive of a couple of supercells and one or two small upscale growing thunderstorm clusters. Beneath modest to weak northwest mid-level flow, this activity may pose a risk for severe hail and wind while propagating off the higher terrain through this evening. Continuing development into portions of west Texas overnight is more unclear. ..Kerr/Squitieri.. 06/09/2025 Read more

SPC Jun 9, 2025 0600 UTC Day 1 Convective Outlook

3 months ago
SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1254 AM CDT Mon Jun 09 2025 Valid 091200Z - 101200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TODAY ACROSS PARTS OF THE OHIO AND LOWER MISSISSIPPI VALLEYS INTO THE APPALACHIANS AND SOUTH ATLANTIC SEABOARD,...AS WELL PARTS OF NORTHEASTERN NEW MEXICO... ...SUMMARY... Scattered strong to severe thunderstorm development appears probable today, particularly across parts of the Ohio Valley into Appalachians, and east of the lower Mississippi Valley into eastern Gulf Coast states. ...Discussion... It appears that mid/upper ridging inland of the Pacific coast through the western Canadian Prairies and northern U.S. Rockies is beginning to become suppressed by a short wave perturbation. As this continues, a seasonably deep downstream trough, currently still digging through the northern Great Plains/Upper Midwest vicinity, is forecast to pivot east-northeastward across the Great Lakes and Ohio Valley, gradually taking on a negative tilt as it does. An initially broad, modest associated surface cyclone may deepen some, mainly across northern Ontario into the James Bay vicinity, with at least a couple of reinforcing surges of cooler air overspreading the Great Lakes region, Ohio and Mississippi Valleys. Within a belt of more modest cyclonic mid/upper flow in latitudes to the east of the southern Rockies, at least one notable meso-beta to meso-alpha scale cyclonic circulation appears to be in the process of developing near the Ark-La-Tex vicinity. It appears that this circulation will tend to migrate east-northeastward across and to the east of the lower Mississippi Valley during the day. However, the extent to which it is maintained or becomes sheared, as larger-scale troughing within the two branches of westerlies tends to come in phase, remains unclear based on latest model output. Upstream, weak mid-level troughing is forecast to dig inland of the southern California coast, through the Southwest, around the northeastern periphery of a prominent mid-level high over the subtropical eastern Pacific. Seasonably moist air appears likely to remain largely confined to a remnant frontal zone across the southern tier of the U.S., associated with the modest southern mid- and subtropical westerlies. However, a narrow plume of southerly return flow is ongoing ahead of the lead reinforcing cold front now advancing southeast of the upper Great Lakes and Midwest. ...Lower Mississippi Valley into south Atlantic Seaboard... Potential convective evolution remains unclear, but guidance remains suggestive that ongoing convective development propagating across northeastern and north central Texas will be in the process of weakening while spreading into Louisiana and upper Texas coastal areas early in the period. Additional convection is also likely to be ongoing downstream of the emerging mesoscale vortex, aided by low-level warm advection, as it migrates east of the Mississippi Valley. The impact of this convection on boundary-layer destabilization remains unclear. However, while mid-level lapse rates may be weak, with at least some insolation, boundary-layer dew points in excess of 70 F across the Gulf Coast region may contribute to sufficient destabilization to support at least scattered intensifying thunderstorm development, both upstream and downstream of the convective vortex. Some of this activity may pose a risk for, mainly, strong surface gusts. A brief tornado also might be possible, particularly near the convective vortex as long as it remains relatively well-defined. This severe risk may continue into the south Atlantic Seaboard tonight, but this remains more unclear. ...Ohio Valley into Appalachians... Moderate boundary-layer destabilization ahead of the lead cold front might provide support for scattered strong to severe thunderstorm development, including supercells, in the presence of strong deep-layer shear beneath 40-60+ kt southwesterly mid/upper flow. Toward mid to late afternoon, it is possible that modestly deepening surface troughing across the upper Ohio Valley into the lee of the Allegheny front may provide a better defined focus for this threat. ...Great Lakes vicinity... Convection-allowing model output and associated guidance suggest that destabilization and shear may become supportive of convection capable of producing severe hail and wind in a narrow corridor ahead of a secondary surface cold front (closer to the mid-level cold core overspreading the Great Lakes), as it advances across and east-southeast of Lake Michigan this afternoon. ...Southern Rockies through northwestern Gulf coast... Extensive convective outflow appears likely to be progressing into and through the upper Texas coastal plain by the beginning of the period, and perhaps gradually stalling across parts of south central Texas into the Pecos Valley. The gust front might still be a focus for widely scattered strong thunderstorm development early in the day, otherwise the extent of the outflow's stabilizing influence remains unclear, particularly later in period to the lee of the southern Rockies. Downstream of the Southwestern mid-level tough, models suggest that destabilizing, moist upslope flow into the Raton Mesa/eastern slopes of the Sangre de Cristo Mountains might become supportive of a couple of supercells and one or two small upscale growing thunderstorm clusters. Beneath modest to weak northwest mid-level flow, this activity may pose a risk for severe hail and wind while propagating off the higher terrain through this evening. Continuing development into portions of west Texas overnight is more unclear. ..Kerr/Squitieri.. 06/09/2025 Read more

SPC Jun 9, 2025 0600 UTC Day 1 Convective Outlook

3 months ago
SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1254 AM CDT Mon Jun 09 2025 Valid 091200Z - 101200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TODAY ACROSS PARTS OF THE OHIO AND LOWER MISSISSIPPI VALLEYS INTO THE APPALACHIANS AND SOUTH ATLANTIC SEABOARD,...AS WELL PARTS OF NORTHEASTERN NEW MEXICO... ...SUMMARY... Scattered strong to severe thunderstorm development appears probable today, particularly across parts of the Ohio Valley into Appalachians, and east of the lower Mississippi Valley into eastern Gulf Coast states. ...Discussion... It appears that mid/upper ridging inland of the Pacific coast through the western Canadian Prairies and northern U.S. Rockies is beginning to become suppressed by a short wave perturbation. As this continues, a seasonably deep downstream trough, currently still digging through the northern Great Plains/Upper Midwest vicinity, is forecast to pivot east-northeastward across the Great Lakes and Ohio Valley, gradually taking on a negative tilt as it does. An initially broad, modest associated surface cyclone may deepen some, mainly across northern Ontario into the James Bay vicinity, with at least a couple of reinforcing surges of cooler air overspreading the Great Lakes region, Ohio and Mississippi Valleys. Within a belt of more modest cyclonic mid/upper flow in latitudes to the east of the southern Rockies, at least one notable meso-beta to meso-alpha scale cyclonic circulation appears to be in the process of developing near the Ark-La-Tex vicinity. It appears that this circulation will tend to migrate east-northeastward across and to the east of the lower Mississippi Valley during the day. However, the extent to which it is maintained or becomes sheared, as larger-scale troughing within the two branches of westerlies tends to come in phase, remains unclear based on latest model output. Upstream, weak mid-level troughing is forecast to dig inland of the southern California coast, through the Southwest, around the northeastern periphery of a prominent mid-level high over the subtropical eastern Pacific. Seasonably moist air appears likely to remain largely confined to a remnant frontal zone across the southern tier of the U.S., associated with the modest southern mid- and subtropical westerlies. However, a narrow plume of southerly return flow is ongoing ahead of the lead reinforcing cold front now advancing southeast of the upper Great Lakes and Midwest. ...Lower Mississippi Valley into south Atlantic Seaboard... Potential convective evolution remains unclear, but guidance remains suggestive that ongoing convective development propagating across northeastern and north central Texas will be in the process of weakening while spreading into Louisiana and upper Texas coastal areas early in the period. Additional convection is also likely to be ongoing downstream of the emerging mesoscale vortex, aided by low-level warm advection, as it migrates east of the Mississippi Valley. The impact of this convection on boundary-layer destabilization remains unclear. However, while mid-level lapse rates may be weak, with at least some insolation, boundary-layer dew points in excess of 70 F across the Gulf Coast region may contribute to sufficient destabilization to support at least scattered intensifying thunderstorm development, both upstream and downstream of the convective vortex. Some of this activity may pose a risk for, mainly, strong surface gusts. A brief tornado also might be possible, particularly near the convective vortex as long as it remains relatively well-defined. This severe risk may continue into the south Atlantic Seaboard tonight, but this remains more unclear. ...Ohio Valley into Appalachians... Moderate boundary-layer destabilization ahead of the lead cold front might provide support for scattered strong to severe thunderstorm development, including supercells, in the presence of strong deep-layer shear beneath 40-60+ kt southwesterly mid/upper flow. Toward mid to late afternoon, it is possible that modestly deepening surface troughing across the upper Ohio Valley into the lee of the Allegheny front may provide a better defined focus for this threat. ...Great Lakes vicinity... Convection-allowing model output and associated guidance suggest that destabilization and shear may become supportive of convection capable of producing severe hail and wind in a narrow corridor ahead of a secondary surface cold front (closer to the mid-level cold core overspreading the Great Lakes), as it advances across and east-southeast of Lake Michigan this afternoon. ...Southern Rockies through northwestern Gulf coast... Extensive convective outflow appears likely to be progressing into and through the upper Texas coastal plain by the beginning of the period, and perhaps gradually stalling across parts of south central Texas into the Pecos Valley. The gust front might still be a focus for widely scattered strong thunderstorm development early in the day, otherwise the extent of the outflow's stabilizing influence remains unclear, particularly later in period to the lee of the southern Rockies. Downstream of the Southwestern mid-level tough, models suggest that destabilizing, moist upslope flow into the Raton Mesa/eastern slopes of the Sangre de Cristo Mountains might become supportive of a couple of supercells and one or two small upscale growing thunderstorm clusters. Beneath modest to weak northwest mid-level flow, this activity may pose a risk for severe hail and wind while propagating off the higher terrain through this evening. Continuing development into portions of west Texas overnight is more unclear. ..Kerr/Squitieri.. 06/09/2025 Read more

SPC Jun 9, 2025 0600 UTC Day 1 Convective Outlook

3 months ago
SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1254 AM CDT Mon Jun 09 2025 Valid 091200Z - 101200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TODAY ACROSS PARTS OF THE OHIO AND LOWER MISSISSIPPI VALLEYS INTO THE APPALACHIANS AND SOUTH ATLANTIC SEABOARD,...AS WELL PARTS OF NORTHEASTERN NEW MEXICO... ...SUMMARY... Scattered strong to severe thunderstorm development appears probable today, particularly across parts of the Ohio Valley into Appalachians, and east of the lower Mississippi Valley into eastern Gulf Coast states. ...Discussion... It appears that mid/upper ridging inland of the Pacific coast through the western Canadian Prairies and northern U.S. Rockies is beginning to become suppressed by a short wave perturbation. As this continues, a seasonably deep downstream trough, currently still digging through the northern Great Plains/Upper Midwest vicinity, is forecast to pivot east-northeastward across the Great Lakes and Ohio Valley, gradually taking on a negative tilt as it does. An initially broad, modest associated surface cyclone may deepen some, mainly across northern Ontario into the James Bay vicinity, with at least a couple of reinforcing surges of cooler air overspreading the Great Lakes region, Ohio and Mississippi Valleys. Within a belt of more modest cyclonic mid/upper flow in latitudes to the east of the southern Rockies, at least one notable meso-beta to meso-alpha scale cyclonic circulation appears to be in the process of developing near the Ark-La-Tex vicinity. It appears that this circulation will tend to migrate east-northeastward across and to the east of the lower Mississippi Valley during the day. However, the extent to which it is maintained or becomes sheared, as larger-scale troughing within the two branches of westerlies tends to come in phase, remains unclear based on latest model output. Upstream, weak mid-level troughing is forecast to dig inland of the southern California coast, through the Southwest, around the northeastern periphery of a prominent mid-level high over the subtropical eastern Pacific. Seasonably moist air appears likely to remain largely confined to a remnant frontal zone across the southern tier of the U.S., associated with the modest southern mid- and subtropical westerlies. However, a narrow plume of southerly return flow is ongoing ahead of the lead reinforcing cold front now advancing southeast of the upper Great Lakes and Midwest. ...Lower Mississippi Valley into south Atlantic Seaboard... Potential convective evolution remains unclear, but guidance remains suggestive that ongoing convective development propagating across northeastern and north central Texas will be in the process of weakening while spreading into Louisiana and upper Texas coastal areas early in the period. Additional convection is also likely to be ongoing downstream of the emerging mesoscale vortex, aided by low-level warm advection, as it migrates east of the Mississippi Valley. The impact of this convection on boundary-layer destabilization remains unclear. However, while mid-level lapse rates may be weak, with at least some insolation, boundary-layer dew points in excess of 70 F across the Gulf Coast region may contribute to sufficient destabilization to support at least scattered intensifying thunderstorm development, both upstream and downstream of the convective vortex. Some of this activity may pose a risk for, mainly, strong surface gusts. A brief tornado also might be possible, particularly near the convective vortex as long as it remains relatively well-defined. This severe risk may continue into the south Atlantic Seaboard tonight, but this remains more unclear. ...Ohio Valley into Appalachians... Moderate boundary-layer destabilization ahead of the lead cold front might provide support for scattered strong to severe thunderstorm development, including supercells, in the presence of strong deep-layer shear beneath 40-60+ kt southwesterly mid/upper flow. Toward mid to late afternoon, it is possible that modestly deepening surface troughing across the upper Ohio Valley into the lee of the Allegheny front may provide a better defined focus for this threat. ...Great Lakes vicinity... Convection-allowing model output and associated guidance suggest that destabilization and shear may become supportive of convection capable of producing severe hail and wind in a narrow corridor ahead of a secondary surface cold front (closer to the mid-level cold core overspreading the Great Lakes), as it advances across and east-southeast of Lake Michigan this afternoon. ...Southern Rockies through northwestern Gulf coast... Extensive convective outflow appears likely to be progressing into and through the upper Texas coastal plain by the beginning of the period, and perhaps gradually stalling across parts of south central Texas into the Pecos Valley. The gust front might still be a focus for widely scattered strong thunderstorm development early in the day, otherwise the extent of the outflow's stabilizing influence remains unclear, particularly later in period to the lee of the southern Rockies. Downstream of the Southwestern mid-level tough, models suggest that destabilizing, moist upslope flow into the Raton Mesa/eastern slopes of the Sangre de Cristo Mountains might become supportive of a couple of supercells and one or two small upscale growing thunderstorm clusters. Beneath modest to weak northwest mid-level flow, this activity may pose a risk for severe hail and wind while propagating off the higher terrain through this evening. Continuing development into portions of west Texas overnight is more unclear. ..Kerr/Squitieri.. 06/09/2025 Read more

SPC Jun 9, 2025 0600 UTC Day 1 Convective Outlook

3 months ago
SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1254 AM CDT Mon Jun 09 2025 Valid 091200Z - 101200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TODAY ACROSS PARTS OF THE OHIO AND LOWER MISSISSIPPI VALLEYS INTO THE APPALACHIANS AND SOUTH ATLANTIC SEABOARD,...AS WELL PARTS OF NORTHEASTERN NEW MEXICO... ...SUMMARY... Scattered strong to severe thunderstorm development appears probable today, particularly across parts of the Ohio Valley into Appalachians, and east of the lower Mississippi Valley into eastern Gulf Coast states. ...Discussion... It appears that mid/upper ridging inland of the Pacific coast through the western Canadian Prairies and northern U.S. Rockies is beginning to become suppressed by a short wave perturbation. As this continues, a seasonably deep downstream trough, currently still digging through the northern Great Plains/Upper Midwest vicinity, is forecast to pivot east-northeastward across the Great Lakes and Ohio Valley, gradually taking on a negative tilt as it does. An initially broad, modest associated surface cyclone may deepen some, mainly across northern Ontario into the James Bay vicinity, with at least a couple of reinforcing surges of cooler air overspreading the Great Lakes region, Ohio and Mississippi Valleys. Within a belt of more modest cyclonic mid/upper flow in latitudes to the east of the southern Rockies, at least one notable meso-beta to meso-alpha scale cyclonic circulation appears to be in the process of developing near the Ark-La-Tex vicinity. It appears that this circulation will tend to migrate east-northeastward across and to the east of the lower Mississippi Valley during the day. However, the extent to which it is maintained or becomes sheared, as larger-scale troughing within the two branches of westerlies tends to come in phase, remains unclear based on latest model output. Upstream, weak mid-level troughing is forecast to dig inland of the southern California coast, through the Southwest, around the northeastern periphery of a prominent mid-level high over the subtropical eastern Pacific. Seasonably moist air appears likely to remain largely confined to a remnant frontal zone across the southern tier of the U.S., associated with the modest southern mid- and subtropical westerlies. However, a narrow plume of southerly return flow is ongoing ahead of the lead reinforcing cold front now advancing southeast of the upper Great Lakes and Midwest. ...Lower Mississippi Valley into south Atlantic Seaboard... Potential convective evolution remains unclear, but guidance remains suggestive that ongoing convective development propagating across northeastern and north central Texas will be in the process of weakening while spreading into Louisiana and upper Texas coastal areas early in the period. Additional convection is also likely to be ongoing downstream of the emerging mesoscale vortex, aided by low-level warm advection, as it migrates east of the Mississippi Valley. The impact of this convection on boundary-layer destabilization remains unclear. However, while mid-level lapse rates may be weak, with at least some insolation, boundary-layer dew points in excess of 70 F across the Gulf Coast region may contribute to sufficient destabilization to support at least scattered intensifying thunderstorm development, both upstream and downstream of the convective vortex. Some of this activity may pose a risk for, mainly, strong surface gusts. A brief tornado also might be possible, particularly near the convective vortex as long as it remains relatively well-defined. This severe risk may continue into the south Atlantic Seaboard tonight, but this remains more unclear. ...Ohio Valley into Appalachians... Moderate boundary-layer destabilization ahead of the lead cold front might provide support for scattered strong to severe thunderstorm development, including supercells, in the presence of strong deep-layer shear beneath 40-60+ kt southwesterly mid/upper flow. Toward mid to late afternoon, it is possible that modestly deepening surface troughing across the upper Ohio Valley into the lee of the Allegheny front may provide a better defined focus for this threat. ...Great Lakes vicinity... Convection-allowing model output and associated guidance suggest that destabilization and shear may become supportive of convection capable of producing severe hail and wind in a narrow corridor ahead of a secondary surface cold front (closer to the mid-level cold core overspreading the Great Lakes), as it advances across and east-southeast of Lake Michigan this afternoon. ...Southern Rockies through northwestern Gulf coast... Extensive convective outflow appears likely to be progressing into and through the upper Texas coastal plain by the beginning of the period, and perhaps gradually stalling across parts of south central Texas into the Pecos Valley. The gust front might still be a focus for widely scattered strong thunderstorm development early in the day, otherwise the extent of the outflow's stabilizing influence remains unclear, particularly later in period to the lee of the southern Rockies. Downstream of the Southwestern mid-level tough, models suggest that destabilizing, moist upslope flow into the Raton Mesa/eastern slopes of the Sangre de Cristo Mountains might become supportive of a couple of supercells and one or two small upscale growing thunderstorm clusters. Beneath modest to weak northwest mid-level flow, this activity may pose a risk for severe hail and wind while propagating off the higher terrain through this evening. Continuing development into portions of west Texas overnight is more unclear. ..Kerr/Squitieri.. 06/09/2025 Read more

SPC Jun 9, 2025 0600 UTC Day 1 Convective Outlook

3 months ago
SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1254 AM CDT Mon Jun 09 2025 Valid 091200Z - 101200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TODAY ACROSS PARTS OF THE OHIO AND LOWER MISSISSIPPI VALLEYS INTO THE APPALACHIANS AND SOUTH ATLANTIC SEABOARD,...AS WELL PARTS OF NORTHEASTERN NEW MEXICO... ...SUMMARY... Scattered strong to severe thunderstorm development appears probable today, particularly across parts of the Ohio Valley into Appalachians, and east of the lower Mississippi Valley into eastern Gulf Coast states. ...Discussion... It appears that mid/upper ridging inland of the Pacific coast through the western Canadian Prairies and northern U.S. Rockies is beginning to become suppressed by a short wave perturbation. As this continues, a seasonably deep downstream trough, currently still digging through the northern Great Plains/Upper Midwest vicinity, is forecast to pivot east-northeastward across the Great Lakes and Ohio Valley, gradually taking on a negative tilt as it does. An initially broad, modest associated surface cyclone may deepen some, mainly across northern Ontario into the James Bay vicinity, with at least a couple of reinforcing surges of cooler air overspreading the Great Lakes region, Ohio and Mississippi Valleys. Within a belt of more modest cyclonic mid/upper flow in latitudes to the east of the southern Rockies, at least one notable meso-beta to meso-alpha scale cyclonic circulation appears to be in the process of developing near the Ark-La-Tex vicinity. It appears that this circulation will tend to migrate east-northeastward across and to the east of the lower Mississippi Valley during the day. However, the extent to which it is maintained or becomes sheared, as larger-scale troughing within the two branches of westerlies tends to come in phase, remains unclear based on latest model output. Upstream, weak mid-level troughing is forecast to dig inland of the southern California coast, through the Southwest, around the northeastern periphery of a prominent mid-level high over the subtropical eastern Pacific. Seasonably moist air appears likely to remain largely confined to a remnant frontal zone across the southern tier of the U.S., associated with the modest southern mid- and subtropical westerlies. However, a narrow plume of southerly return flow is ongoing ahead of the lead reinforcing cold front now advancing southeast of the upper Great Lakes and Midwest. ...Lower Mississippi Valley into south Atlantic Seaboard... Potential convective evolution remains unclear, but guidance remains suggestive that ongoing convective development propagating across northeastern and north central Texas will be in the process of weakening while spreading into Louisiana and upper Texas coastal areas early in the period. Additional convection is also likely to be ongoing downstream of the emerging mesoscale vortex, aided by low-level warm advection, as it migrates east of the Mississippi Valley. The impact of this convection on boundary-layer destabilization remains unclear. However, while mid-level lapse rates may be weak, with at least some insolation, boundary-layer dew points in excess of 70 F across the Gulf Coast region may contribute to sufficient destabilization to support at least scattered intensifying thunderstorm development, both upstream and downstream of the convective vortex. Some of this activity may pose a risk for, mainly, strong surface gusts. A brief tornado also might be possible, particularly near the convective vortex as long as it remains relatively well-defined. This severe risk may continue into the south Atlantic Seaboard tonight, but this remains more unclear. ...Ohio Valley into Appalachians... Moderate boundary-layer destabilization ahead of the lead cold front might provide support for scattered strong to severe thunderstorm development, including supercells, in the presence of strong deep-layer shear beneath 40-60+ kt southwesterly mid/upper flow. Toward mid to late afternoon, it is possible that modestly deepening surface troughing across the upper Ohio Valley into the lee of the Allegheny front may provide a better defined focus for this threat. ...Great Lakes vicinity... Convection-allowing model output and associated guidance suggest that destabilization and shear may become supportive of convection capable of producing severe hail and wind in a narrow corridor ahead of a secondary surface cold front (closer to the mid-level cold core overspreading the Great Lakes), as it advances across and east-southeast of Lake Michigan this afternoon. ...Southern Rockies through northwestern Gulf coast... Extensive convective outflow appears likely to be progressing into and through the upper Texas coastal plain by the beginning of the period, and perhaps gradually stalling across parts of south central Texas into the Pecos Valley. The gust front might still be a focus for widely scattered strong thunderstorm development early in the day, otherwise the extent of the outflow's stabilizing influence remains unclear, particularly later in period to the lee of the southern Rockies. Downstream of the Southwestern mid-level tough, models suggest that destabilizing, moist upslope flow into the Raton Mesa/eastern slopes of the Sangre de Cristo Mountains might become supportive of a couple of supercells and one or two small upscale growing thunderstorm clusters. Beneath modest to weak northwest mid-level flow, this activity may pose a risk for severe hail and wind while propagating off the higher terrain through this evening. Continuing development into portions of west Texas overnight is more unclear. ..Kerr/Squitieri.. 06/09/2025 Read more

SPC Jun 9, 2025 0600 UTC Day 1 Convective Outlook

3 months ago
SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1254 AM CDT Mon Jun 09 2025 Valid 091200Z - 101200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TODAY ACROSS PARTS OF THE OHIO AND LOWER MISSISSIPPI VALLEYS INTO THE APPALACHIANS AND SOUTH ATLANTIC SEABOARD,...AS WELL PARTS OF NORTHEASTERN NEW MEXICO... ...SUMMARY... Scattered strong to severe thunderstorm development appears probable today, particularly across parts of the Ohio Valley into Appalachians, and east of the lower Mississippi Valley into eastern Gulf Coast states. ...Discussion... It appears that mid/upper ridging inland of the Pacific coast through the western Canadian Prairies and northern U.S. Rockies is beginning to become suppressed by a short wave perturbation. As this continues, a seasonably deep downstream trough, currently still digging through the northern Great Plains/Upper Midwest vicinity, is forecast to pivot east-northeastward across the Great Lakes and Ohio Valley, gradually taking on a negative tilt as it does. An initially broad, modest associated surface cyclone may deepen some, mainly across northern Ontario into the James Bay vicinity, with at least a couple of reinforcing surges of cooler air overspreading the Great Lakes region, Ohio and Mississippi Valleys. Within a belt of more modest cyclonic mid/upper flow in latitudes to the east of the southern Rockies, at least one notable meso-beta to meso-alpha scale cyclonic circulation appears to be in the process of developing near the Ark-La-Tex vicinity. It appears that this circulation will tend to migrate east-northeastward across and to the east of the lower Mississippi Valley during the day. However, the extent to which it is maintained or becomes sheared, as larger-scale troughing within the two branches of westerlies tends to come in phase, remains unclear based on latest model output. Upstream, weak mid-level troughing is forecast to dig inland of the southern California coast, through the Southwest, around the northeastern periphery of a prominent mid-level high over the subtropical eastern Pacific. Seasonably moist air appears likely to remain largely confined to a remnant frontal zone across the southern tier of the U.S., associated with the modest southern mid- and subtropical westerlies. However, a narrow plume of southerly return flow is ongoing ahead of the lead reinforcing cold front now advancing southeast of the upper Great Lakes and Midwest. ...Lower Mississippi Valley into south Atlantic Seaboard... Potential convective evolution remains unclear, but guidance remains suggestive that ongoing convective development propagating across northeastern and north central Texas will be in the process of weakening while spreading into Louisiana and upper Texas coastal areas early in the period. Additional convection is also likely to be ongoing downstream of the emerging mesoscale vortex, aided by low-level warm advection, as it migrates east of the Mississippi Valley. The impact of this convection on boundary-layer destabilization remains unclear. However, while mid-level lapse rates may be weak, with at least some insolation, boundary-layer dew points in excess of 70 F across the Gulf Coast region may contribute to sufficient destabilization to support at least scattered intensifying thunderstorm development, both upstream and downstream of the convective vortex. Some of this activity may pose a risk for, mainly, strong surface gusts. A brief tornado also might be possible, particularly near the convective vortex as long as it remains relatively well-defined. This severe risk may continue into the south Atlantic Seaboard tonight, but this remains more unclear. ...Ohio Valley into Appalachians... Moderate boundary-layer destabilization ahead of the lead cold front might provide support for scattered strong to severe thunderstorm development, including supercells, in the presence of strong deep-layer shear beneath 40-60+ kt southwesterly mid/upper flow. Toward mid to late afternoon, it is possible that modestly deepening surface troughing across the upper Ohio Valley into the lee of the Allegheny front may provide a better defined focus for this threat. ...Great Lakes vicinity... Convection-allowing model output and associated guidance suggest that destabilization and shear may become supportive of convection capable of producing severe hail and wind in a narrow corridor ahead of a secondary surface cold front (closer to the mid-level cold core overspreading the Great Lakes), as it advances across and east-southeast of Lake Michigan this afternoon. ...Southern Rockies through northwestern Gulf coast... Extensive convective outflow appears likely to be progressing into and through the upper Texas coastal plain by the beginning of the period, and perhaps gradually stalling across parts of south central Texas into the Pecos Valley. The gust front might still be a focus for widely scattered strong thunderstorm development early in the day, otherwise the extent of the outflow's stabilizing influence remains unclear, particularly later in period to the lee of the southern Rockies. Downstream of the Southwestern mid-level tough, models suggest that destabilizing, moist upslope flow into the Raton Mesa/eastern slopes of the Sangre de Cristo Mountains might become supportive of a couple of supercells and one or two small upscale growing thunderstorm clusters. Beneath modest to weak northwest mid-level flow, this activity may pose a risk for severe hail and wind while propagating off the higher terrain through this evening. Continuing development into portions of west Texas overnight is more unclear. ..Kerr/Squitieri.. 06/09/2025 Read more

SPC Jun 9, 2025 0600 UTC Day 1 Convective Outlook

3 months ago
SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1254 AM CDT Mon Jun 09 2025 Valid 091200Z - 101200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TODAY ACROSS PARTS OF THE OHIO AND LOWER MISSISSIPPI VALLEYS INTO THE APPALACHIANS AND SOUTH ATLANTIC SEABOARD,...AS WELL PARTS OF NORTHEASTERN NEW MEXICO... ...SUMMARY... Scattered strong to severe thunderstorm development appears probable today, particularly across parts of the Ohio Valley into Appalachians, and east of the lower Mississippi Valley into eastern Gulf Coast states. ...Discussion... It appears that mid/upper ridging inland of the Pacific coast through the western Canadian Prairies and northern U.S. Rockies is beginning to become suppressed by a short wave perturbation. As this continues, a seasonably deep downstream trough, currently still digging through the northern Great Plains/Upper Midwest vicinity, is forecast to pivot east-northeastward across the Great Lakes and Ohio Valley, gradually taking on a negative tilt as it does. An initially broad, modest associated surface cyclone may deepen some, mainly across northern Ontario into the James Bay vicinity, with at least a couple of reinforcing surges of cooler air overspreading the Great Lakes region, Ohio and Mississippi Valleys. Within a belt of more modest cyclonic mid/upper flow in latitudes to the east of the southern Rockies, at least one notable meso-beta to meso-alpha scale cyclonic circulation appears to be in the process of developing near the Ark-La-Tex vicinity. It appears that this circulation will tend to migrate east-northeastward across and to the east of the lower Mississippi Valley during the day. However, the extent to which it is maintained or becomes sheared, as larger-scale troughing within the two branches of westerlies tends to come in phase, remains unclear based on latest model output. Upstream, weak mid-level troughing is forecast to dig inland of the southern California coast, through the Southwest, around the northeastern periphery of a prominent mid-level high over the subtropical eastern Pacific. Seasonably moist air appears likely to remain largely confined to a remnant frontal zone across the southern tier of the U.S., associated with the modest southern mid- and subtropical westerlies. However, a narrow plume of southerly return flow is ongoing ahead of the lead reinforcing cold front now advancing southeast of the upper Great Lakes and Midwest. ...Lower Mississippi Valley into south Atlantic Seaboard... Potential convective evolution remains unclear, but guidance remains suggestive that ongoing convective development propagating across northeastern and north central Texas will be in the process of weakening while spreading into Louisiana and upper Texas coastal areas early in the period. Additional convection is also likely to be ongoing downstream of the emerging mesoscale vortex, aided by low-level warm advection, as it migrates east of the Mississippi Valley. The impact of this convection on boundary-layer destabilization remains unclear. However, while mid-level lapse rates may be weak, with at least some insolation, boundary-layer dew points in excess of 70 F across the Gulf Coast region may contribute to sufficient destabilization to support at least scattered intensifying thunderstorm development, both upstream and downstream of the convective vortex. Some of this activity may pose a risk for, mainly, strong surface gusts. A brief tornado also might be possible, particularly near the convective vortex as long as it remains relatively well-defined. This severe risk may continue into the south Atlantic Seaboard tonight, but this remains more unclear. ...Ohio Valley into Appalachians... Moderate boundary-layer destabilization ahead of the lead cold front might provide support for scattered strong to severe thunderstorm development, including supercells, in the presence of strong deep-layer shear beneath 40-60+ kt southwesterly mid/upper flow. Toward mid to late afternoon, it is possible that modestly deepening surface troughing across the upper Ohio Valley into the lee of the Allegheny front may provide a better defined focus for this threat. ...Great Lakes vicinity... Convection-allowing model output and associated guidance suggest that destabilization and shear may become supportive of convection capable of producing severe hail and wind in a narrow corridor ahead of a secondary surface cold front (closer to the mid-level cold core overspreading the Great Lakes), as it advances across and east-southeast of Lake Michigan this afternoon. ...Southern Rockies through northwestern Gulf coast... Extensive convective outflow appears likely to be progressing into and through the upper Texas coastal plain by the beginning of the period, and perhaps gradually stalling across parts of south central Texas into the Pecos Valley. The gust front might still be a focus for widely scattered strong thunderstorm development early in the day, otherwise the extent of the outflow's stabilizing influence remains unclear, particularly later in period to the lee of the southern Rockies. Downstream of the Southwestern mid-level tough, models suggest that destabilizing, moist upslope flow into the Raton Mesa/eastern slopes of the Sangre de Cristo Mountains might become supportive of a couple of supercells and one or two small upscale growing thunderstorm clusters. Beneath modest to weak northwest mid-level flow, this activity may pose a risk for severe hail and wind while propagating off the higher terrain through this evening. Continuing development into portions of west Texas overnight is more unclear. ..Kerr/Squitieri.. 06/09/2025 Read more

SPC MD 1217

3 months ago
MD 1217 CONCERNING SEVERE THUNDERSTORM WATCH 399... FOR PARTS OF NORTH/CENTRAL/EAST TX INTO WESTERN LA AND EXTREME SOUTHEAST OK/SOUTHWEST AR
Mesoscale Discussion 1217 NWS Storm Prediction Center Norman OK 1129 PM CDT Sun Jun 08 2025 Areas affected...Parts of north/central/east TX into western LA and extreme southeast OK/southwest AR Concerning...Severe Thunderstorm Watch 399... Valid 090429Z - 090600Z The severe weather threat for Severe Thunderstorm Watch 399 continues. SUMMARY...Swaths of damaging wind are possible into the overnight. DISCUSSION...A well-organized bow echo has evolved across northeast TX, with regional radars suggesting the presence of a rather strong rear-inflow jet. There is some lingering influence of earlier convection and related outflow downstream of this bow, but given its current organized state and the presence of favorable buoyancy and deep-layer shear, an organized damaging-wind threat (with gusts potentially 75 mph or greater) is likely to continue southeastward into at least the early overnight hours. Line-embedded tornadoes also cannot be ruled out. Farther west, southward-moving outflow has resulted in measured severe gusts across parts of the DFW Metroplex. A small bowing segment with embedded supercells (the remnant of an earlier long-lived supercell cluster) has recently intensified and produced a 60 kt gust in Mineral Wells. This eastward-moving bow is intersecting the southward-moving outflow, and may continue eastward across parts of the Metroplex with a continued severe-wind threat, and possibly a tornado in the vicinity of the intersecting outflow boundaries. Some severe threat may eventually spread east and south of WW 399, and local watch expansion and/or new watch issuance may eventually be needed. ..Dean/Gleason.. 06/09/2025 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...SHV...TSA...HGX...FWD... LAT...LON 31859320 31169442 31049644 31549777 32499795 32809777 33119590 34159531 34069436 33849398 33169358 32509323 32149312 31859320 MOST PROBABLE PEAK TORNADO INTENSITY...85-115 MPH MOST PROBABLE PEAK WIND GUST...75-90 MPH MOST PROBABLE PEAK HAIL SIZE...1.00-1.75 IN Read more

SPC Severe Thunderstorm Watch 399 Status Reports

3 months ago
WW 0399 Status Updates
STATUS REPORT ON WW 399 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 50 NE ABI TO 45 SSW PRX TO 15 S PRX TO 30 N PRX. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1217 ..GLEASON..06/09/25 ATTN...WFO...SHV...TSA...FWD... STATUS REPORT FOR WS 399 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS ARC073-091-090540- AR . ARKANSAS COUNTIES INCLUDED ARE LAFAYETTE MILLER LAC015-017-031-090540- LA . LOUISIANA PARISHES INCLUDED ARE BOSSIER CADDO DE SOTO OKC023-089-127-090540- OK . OKLAHOMA COUNTIES INCLUDED ARE CHOCTAW MCCURTAIN PUSHMATAHA Read more

SPC Severe Thunderstorm Watch 399 Status Reports

3 months ago
WW 0399 Status Updates
STATUS REPORT ON WW 399 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 50 NE ABI TO 45 SSW PRX TO 15 S PRX TO 30 N PRX. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1217 ..GLEASON..06/09/25 ATTN...WFO...SHV...TSA...FWD... STATUS REPORT FOR WS 399 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS ARC073-091-090540- AR . ARKANSAS COUNTIES INCLUDED ARE LAFAYETTE MILLER LAC015-017-031-090540- LA . LOUISIANA PARISHES INCLUDED ARE BOSSIER CADDO DE SOTO OKC023-089-127-090540- OK . OKLAHOMA COUNTIES INCLUDED ARE CHOCTAW MCCURTAIN PUSHMATAHA Read more

SPC Severe Thunderstorm Watch 399 Status Reports

3 months ago
WW 0399 Status Updates
STATUS REPORT ON WW 399 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 50 NE ABI TO 45 SSW PRX TO 15 S PRX TO 30 N PRX. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1217 ..GLEASON..06/09/25 ATTN...WFO...SHV...TSA...FWD... STATUS REPORT FOR WS 399 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS ARC073-091-090540- AR . ARKANSAS COUNTIES INCLUDED ARE LAFAYETTE MILLER LAC015-017-031-090540- LA . LOUISIANA PARISHES INCLUDED ARE BOSSIER CADDO DE SOTO OKC023-089-127-090540- OK . OKLAHOMA COUNTIES INCLUDED ARE CHOCTAW MCCURTAIN PUSHMATAHA Read more

SPC MD 1216

3 months ago
MD 1216 CONCERNING SEVERE THUNDERSTORM WATCH 396...399... FOR PORTIONS OF NORTHERN TEXAS INTO EXTREME SOUTHEAST OKLAHOMA
Mesoscale Discussion 1216 NWS Storm Prediction Center Norman OK 0926 PM CDT Sun Jun 08 2025 Areas affected...portions of northern Texas into extreme southeast Oklahoma Concerning...Severe Thunderstorm Watch 396...399... Valid 090226Z - 090400Z The severe weather threat for Severe Thunderstorm Watch 396, 399 continues. SUMMARY...Widespread severe winds are expected across northern Texas with a growing MCS. Further organization into a bow echo is possible, along with 75-100 mph gusts. DISCUSSION...Several supercells and intense multicellular clusters have begun to merge, and they are likely connected by a singular strong/deep cold pool. This resultant MCS continues to track southeastward, with a history of several severe gusts, including those measured at 80-100 mph. Very strong instability and 40-50 kts of effective bulk shear precede this MCS. A derecho is likely over the next several hours, with additional 75-100 mph gusts embedded within a broader swath of 60+ mph winds expected, as also shown by some of the latest WoFS ensemble output. ..Squitieri.. 06/09/2025 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...SHV...TSA...FWD...OUN...SJT... LAT...LON 32430009 32749998 33539855 34349739 34719704 34509570 34309512 34139487 33769459 33099440 32509471 32019522 31709597 31549686 31459776 31479852 31979959 32239999 32430009 MOST PROBABLE PEAK TORNADO INTENSITY...85-115 MPH MOST PROBABLE PEAK WIND GUST...85-100 MPH MOST PROBABLE PEAK HAIL SIZE...1.00-1.75 IN Read more

SPC MD 1215

3 months ago
MD 1215 CONCERNING SEVERE THUNDERSTORM WATCH 396... FOR PORTIONS OF THE TEXAS PANHANDLE
Mesoscale Discussion 1215 NWS Storm Prediction Center Norman OK 0905 PM CDT Sun Jun 08 2025 Areas affected...portions of the Texas Panhandle Concerning...Severe Thunderstorm Watch 396... Valid 090205Z - 090330Z The severe weather threat for Severe Thunderstorm Watch 396 continues. SUMMARY...Some of the stronger storms may still produce a few instances of severe gusts/hail. DISCUSSION...Several multicells and supercells are propagating southward behind residual outflow boundaries across portions of the Texas Panhandle. Over the past couple of hours, a few instances of severe hail/wind have been reported. However, the passage of convective outflow, along with nocturnal cooling should begin to limit the severe threat behind the predominant cluster of thunderstorms over northwestern TX. In the short-term though, a couple more instances of severe hail/wind cannot be ruled out. ..Squitieri.. 06/09/2025 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...OUN...LUB...AMA... LAT...LON 33580155 33960215 34540246 35050257 35010085 34629980 33949980 33550015 33470075 33580155 MOST PROBABLE PEAK WIND GUST...55-70 MPH MOST PROBABLE PEAK HAIL SIZE...1.00-1.75 IN Read more

SPC MD 1214

3 months ago
MD 1214 CONCERNING SEVERE THUNDERSTORM WATCH 395... FOR CENTRAL/SOUTHERN MO INTO SOUTHWEST IL
Mesoscale Discussion 1214 NWS Storm Prediction Center Norman OK 0839 PM CDT Sun Jun 08 2025 Areas affected...Central/southern MO into southwest IL Concerning...Severe Thunderstorm Watch 395... Valid 090139Z - 090315Z The severe weather threat for Severe Thunderstorm Watch 395 continues. SUMMARY...Strong to locally severe storms may spread southeast into late evening. DISCUSSION...Some recent intensification has been noted with storms near a cold front across south-central/southeast MO, with other strong storms ongoing within the post-frontal regime into west-central MO. For the storms near the front, MLCAPE of 1500-2000 J/kg and modest deep-layer shear could support some threat for hail and damaging gusts. Longevity of these storms remains uncertain, but there is some potential for an isolated severe threat to eventually spread southeast out of WW 395. Any potential downstream watch issuance will depend on short-term trends regarding these storms over the next 60-90 minutes. MUCAPE is still on the order of 1000 J/kg immediately north of the front, and an isolated severe threat cannot be ruled out with these storms as well through the evening. Any remaining severe threat should subside in the wake of the post-frontal storms, as cooler and more stable conditions move into the region. ..Dean/Gleason.. 06/09/2025 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...PAH...LSX...SGF...EAX... LAT...LON 36779245 37229378 37699454 38049409 38649235 38459053 38088933 37688926 37348935 37018984 36809037 36689083 36659142 36689190 36779245 MOST PROBABLE PEAK WIND GUST...55-70 MPH MOST PROBABLE PEAK HAIL SIZE...1.00-1.75 IN Read more

SPC MD 1213

3 months ago
MD 1213 CONCERNING SEVERE THUNDERSTORM WATCH 394...396... FOR PORTIONS OF CENTRAL OKLAHOMA
Mesoscale Discussion 1213 NWS Storm Prediction Center Norman OK 0822 PM CDT Sun Jun 08 2025 Areas affected...portions of central Oklahoma Concerning...Severe Thunderstorm Watch 394...396... Valid 090122Z - 090245Z The severe weather threat for Severe Thunderstorm Watch 394, 396 continues. SUMMARY...Thunderstorms have begun increasing in intensity, and a few severe gusts may occur with the stronger storm cores over the next few hours. DISCUSSION...MRMS mosaic radar imagery depicts strengthening multicells and possible supercells in central OK along the leading outflow from earlier convection to the west. KTLX radar data is showing strong inbound velocities with storms immediately west of the OKC metro area, and they are overspreading a very unstable airmass (over 4000 J/kg MLCAPE). As such, severe gusts may accompany the stronger storm cores over the next few hours, as also suggested by some of the latest WoFS ensemble output. ..Squitieri.. 06/09/2025 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...TSA...OUN... LAT...LON 35429814 35409706 35139631 34809606 34569608 34379639 34409692 34569751 34859783 35429814 MOST PROBABLE PEAK WIND GUST...65-80 MPH MOST PROBABLE PEAK HAIL SIZE...1.00-1.75 IN Read more

SPC Severe Thunderstorm Watch 399 Status Reports

3 months ago
WW 0399 Status Updates
STATUS REPORT ON WW 399 THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1216 ..SQUITIERI..06/09/25 ATTN...WFO...SHV...TSA...FWD... STATUS REPORT FOR WS 399 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS ARC073-091-090340- AR . ARKANSAS COUNTIES INCLUDED ARE LAFAYETTE MILLER LAC015-017-031-090340- LA . LOUISIANA PARISHES INCLUDED ARE BOSSIER CADDO DE SOTO OKC023-089-127-090340- OK . OKLAHOMA COUNTIES INCLUDED ARE CHOCTAW MCCURTAIN PUSHMATAHA Read more

SPC Severe Thunderstorm Watch 399 Status Reports

3 months ago
WW 0399 Status Updates
STATUS REPORT ON WW 399 THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1216 ..SQUITIERI..06/09/25 ATTN...WFO...SHV...TSA...FWD... STATUS REPORT FOR WS 399 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS ARC073-091-090340- AR . ARKANSAS COUNTIES INCLUDED ARE LAFAYETTE MILLER LAC015-017-031-090340- LA . LOUISIANA PARISHES INCLUDED ARE BOSSIER CADDO DE SOTO OKC023-089-127-090340- OK . OKLAHOMA COUNTIES INCLUDED ARE CHOCTAW MCCURTAIN PUSHMATAHA Read more

SPC Severe Thunderstorm Watch 396 Status Reports

3 months ago
WW 0396 Status Updates
STATUS REPORT ON WW 396 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 40 ESE AMA TO 10 N CDS TO 35 SSW LTS TO 45 SE SPS. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1216 ..SQUITIERI..06/09/25 ATTN...WFO...OUN...LUB...SJT...MAF... STATUS REPORT FOR WS 396 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS OKC005-013-029-069-095-123-090340- OK . OKLAHOMA COUNTIES INCLUDED ARE ATOKA BRYAN COAL JOHNSTON MARSHALL PONTOTOC TXC009-023-045-059-069-101-107-125-151-153-155-169-189-191-207- 253-263-269-275-303-345-353-369-415-417-433-437-441-447- 090340- TX . TEXAS COUNTIES INCLUDED ARE ARCHER BAYLOR BRISCOE CALLAHAN CASTRO COTTLE CROSBY DICKENS FISHER FLOYD FOARD GARZA HALE HALL HASKELL JONES KENT KING KNOX LUBBOCK MOTLEY Read more

SPC Severe Thunderstorm Watch 396 Status Reports

3 months ago
WW 0396 Status Updates
STATUS REPORT ON WW 396 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 40 ESE AMA TO 10 N CDS TO 35 SSW LTS TO 45 SE SPS. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1216 ..SQUITIERI..06/09/25 ATTN...WFO...OUN...LUB...SJT...MAF... STATUS REPORT FOR WS 396 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS OKC005-013-029-069-095-123-090340- OK . OKLAHOMA COUNTIES INCLUDED ARE ATOKA BRYAN COAL JOHNSTON MARSHALL PONTOTOC TXC009-023-045-059-069-101-107-125-151-153-155-169-189-191-207- 253-263-269-275-303-345-353-369-415-417-433-437-441-447- 090340- TX . TEXAS COUNTIES INCLUDED ARE ARCHER BAYLOR BRISCOE CALLAHAN CASTRO COTTLE CROSBY DICKENS FISHER FLOYD FOARD GARZA HALE HALL HASKELL JONES KENT KING KNOX LUBBOCK MOTLEY Read more
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