Severe Storms

SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0139 AM CDT Sun Sep 07 2025 Valid 071200Z - 081200Z ...Synopsis... A mid-level trough will impinge on the West Coast while upper ridging persists over the Rockies today. The approach of this upper trough will encourage locally dry and breezy conditions across portions of the western and northern Great Basin, though these conditions should largely remain below Elevated thresholds. Upper support with this trough will also lift a buoyant airmass across eastern parts of the Pacific Northwest into the northern Rockies, where both a dry boundary layer (extending to over 700 mb) and dry fuels will overlap. Thunderstorms that develop within this regime will be both wet and dry and nature. However, the degree of fuel receptiveness over eastern parts of the Pacific Northwest into the northern Rockies suggests that lightning-induced ignitions may be efficient, warranting the continuance of isolated dry thunderstorm highlights. ..Squitieri.. 09/07/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0139 AM CDT Sun Sep 07 2025 Valid 071200Z - 081200Z ...Synopsis... A mid-level trough will impinge on the West Coast while upper ridging persists over the Rockies today. The approach of this upper trough will encourage locally dry and breezy conditions across portions of the western and northern Great Basin, though these conditions should largely remain below Elevated thresholds. Upper support with this trough will also lift a buoyant airmass across eastern parts of the Pacific Northwest into the northern Rockies, where both a dry boundary layer (extending to over 700 mb) and dry fuels will overlap. Thunderstorms that develop within this regime will be both wet and dry and nature. However, the degree of fuel receptiveness over eastern parts of the Pacific Northwest into the northern Rockies suggests that lightning-induced ignitions may be efficient, warranting the continuance of isolated dry thunderstorm highlights. ..Squitieri.. 09/07/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0139 AM CDT Sun Sep 07 2025 Valid 071200Z - 081200Z ...Synopsis... A mid-level trough will impinge on the West Coast while upper ridging persists over the Rockies today. The approach of this upper trough will encourage locally dry and breezy conditions across portions of the western and northern Great Basin, though these conditions should largely remain below Elevated thresholds. Upper support with this trough will also lift a buoyant airmass across eastern parts of the Pacific Northwest into the northern Rockies, where both a dry boundary layer (extending to over 700 mb) and dry fuels will overlap. Thunderstorms that develop within this regime will be both wet and dry and nature. However, the degree of fuel receptiveness over eastern parts of the Pacific Northwest into the northern Rockies suggests that lightning-induced ignitions may be efficient, warranting the continuance of isolated dry thunderstorm highlights. ..Squitieri.. 09/07/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0139 AM CDT Sun Sep 07 2025 Valid 071200Z - 081200Z ...Synopsis... A mid-level trough will impinge on the West Coast while upper ridging persists over the Rockies today. The approach of this upper trough will encourage locally dry and breezy conditions across portions of the western and northern Great Basin, though these conditions should largely remain below Elevated thresholds. Upper support with this trough will also lift a buoyant airmass across eastern parts of the Pacific Northwest into the northern Rockies, where both a dry boundary layer (extending to over 700 mb) and dry fuels will overlap. Thunderstorms that develop within this regime will be both wet and dry and nature. However, the degree of fuel receptiveness over eastern parts of the Pacific Northwest into the northern Rockies suggests that lightning-induced ignitions may be efficient, warranting the continuance of isolated dry thunderstorm highlights. ..Squitieri.. 09/07/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0139 AM CDT Sun Sep 07 2025 Valid 071200Z - 081200Z ...Synopsis... A mid-level trough will impinge on the West Coast while upper ridging persists over the Rockies today. The approach of this upper trough will encourage locally dry and breezy conditions across portions of the western and northern Great Basin, though these conditions should largely remain below Elevated thresholds. Upper support with this trough will also lift a buoyant airmass across eastern parts of the Pacific Northwest into the northern Rockies, where both a dry boundary layer (extending to over 700 mb) and dry fuels will overlap. Thunderstorms that develop within this regime will be both wet and dry and nature. However, the degree of fuel receptiveness over eastern parts of the Pacific Northwest into the northern Rockies suggests that lightning-induced ignitions may be efficient, warranting the continuance of isolated dry thunderstorm highlights. ..Squitieri.. 09/07/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC 0600Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1248 AM CDT Sun Sep 07 2025 Valid 081200Z - 091200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS OVER PORTIONS OF THE CENTRAL AND SOUTHERN PLAINS.... ...SUMMARY... Isolated hail and damaging gusts are possible over portions of the central and southern High Plains Monday. ...Synopsis... Northwesterly mid/upper flow will persist over the central U.S., flanked by an upper ridge over the Rockies and an upper trough from the Great Lakes to central Gulf Coast. An embedded shortwave trough will emanate from the central Rockies into the Plains. At the surface, a weak lee low should form over the Dakotas with a trailing surface trough from the Upper MS Valley into the southern High Plains. Southerly flow will transport low 60s F dewpoints north/northeast within a narrow corridor over portions of the High Plains northeast into the eastern Dakotas and MN. ...Central and Southern Plains... A moderately strong remnant low-level jet will likely be ongoing at the start of the period aiding in modest return flow over the High Plains. One or more clusters of storms may also be ongoing near the apex of the LLJ across KS and NE. A narrow plume of 60s F surface dewpoints will likely extend northward along the lee trough to the low into the Dakotas. Heating of the moistening air mass and ascent from the impinging shortwave moving out of the Rockies will support diurnal destabilization along and east of the trailing lee trough, potentially allowing for re-intensification of the early morning storms. Additional isolated thunderstorm development is also possible by late afternoon along the length of the lee trough. However, strong capping and early-day clouds/remnant convection could limit storm coverage/development. Should storms form/redevelop, moderate buoyancy and increasing northwesterly flow aloft will support some storm organization. Veering wind profiles with around 25-35 kt effective shear magnitudes would support a supercell or organized multicell risk. Steepening mid-level lapse rates, and supportive shear could favor some hail, while drier low-levels suggest damaging gusts are possible. ...Pacific Northwest... Ahead of the upper low moving onshore over the Northwest, scattered thunderstorms appear likely Monday afternoon and evening. Moderate southwesterly flow will overspread a warm but modestly moist air mass. Given the limited moisture, buoyancy is expected to be fairly weak as well. Still, steep lapse rates and the stronger mid-level flow could support sporadic strong gusts from high-based storms across central OR into southern WA. ..Lyons.. 09/07/2025 Read more

SPC 0600Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1248 AM CDT Sun Sep 07 2025 Valid 081200Z - 091200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS OVER PORTIONS OF THE CENTRAL AND SOUTHERN PLAINS.... ...SUMMARY... Isolated hail and damaging gusts are possible over portions of the central and southern High Plains Monday. ...Synopsis... Northwesterly mid/upper flow will persist over the central U.S., flanked by an upper ridge over the Rockies and an upper trough from the Great Lakes to central Gulf Coast. An embedded shortwave trough will emanate from the central Rockies into the Plains. At the surface, a weak lee low should form over the Dakotas with a trailing surface trough from the Upper MS Valley into the southern High Plains. Southerly flow will transport low 60s F dewpoints north/northeast within a narrow corridor over portions of the High Plains northeast into the eastern Dakotas and MN. ...Central and Southern Plains... A moderately strong remnant low-level jet will likely be ongoing at the start of the period aiding in modest return flow over the High Plains. One or more clusters of storms may also be ongoing near the apex of the LLJ across KS and NE. A narrow plume of 60s F surface dewpoints will likely extend northward along the lee trough to the low into the Dakotas. Heating of the moistening air mass and ascent from the impinging shortwave moving out of the Rockies will support diurnal destabilization along and east of the trailing lee trough, potentially allowing for re-intensification of the early morning storms. Additional isolated thunderstorm development is also possible by late afternoon along the length of the lee trough. However, strong capping and early-day clouds/remnant convection could limit storm coverage/development. Should storms form/redevelop, moderate buoyancy and increasing northwesterly flow aloft will support some storm organization. Veering wind profiles with around 25-35 kt effective shear magnitudes would support a supercell or organized multicell risk. Steepening mid-level lapse rates, and supportive shear could favor some hail, while drier low-levels suggest damaging gusts are possible. ...Pacific Northwest... Ahead of the upper low moving onshore over the Northwest, scattered thunderstorms appear likely Monday afternoon and evening. Moderate southwesterly flow will overspread a warm but modestly moist air mass. Given the limited moisture, buoyancy is expected to be fairly weak as well. Still, steep lapse rates and the stronger mid-level flow could support sporadic strong gusts from high-based storms across central OR into southern WA. ..Lyons.. 09/07/2025 Read more

SPC 0600Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1248 AM CDT Sun Sep 07 2025 Valid 081200Z - 091200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS OVER PORTIONS OF THE CENTRAL AND SOUTHERN PLAINS.... ...SUMMARY... Isolated hail and damaging gusts are possible over portions of the central and southern High Plains Monday. ...Synopsis... Northwesterly mid/upper flow will persist over the central U.S., flanked by an upper ridge over the Rockies and an upper trough from the Great Lakes to central Gulf Coast. An embedded shortwave trough will emanate from the central Rockies into the Plains. At the surface, a weak lee low should form over the Dakotas with a trailing surface trough from the Upper MS Valley into the southern High Plains. Southerly flow will transport low 60s F dewpoints north/northeast within a narrow corridor over portions of the High Plains northeast into the eastern Dakotas and MN. ...Central and Southern Plains... A moderately strong remnant low-level jet will likely be ongoing at the start of the period aiding in modest return flow over the High Plains. One or more clusters of storms may also be ongoing near the apex of the LLJ across KS and NE. A narrow plume of 60s F surface dewpoints will likely extend northward along the lee trough to the low into the Dakotas. Heating of the moistening air mass and ascent from the impinging shortwave moving out of the Rockies will support diurnal destabilization along and east of the trailing lee trough, potentially allowing for re-intensification of the early morning storms. Additional isolated thunderstorm development is also possible by late afternoon along the length of the lee trough. However, strong capping and early-day clouds/remnant convection could limit storm coverage/development. Should storms form/redevelop, moderate buoyancy and increasing northwesterly flow aloft will support some storm organization. Veering wind profiles with around 25-35 kt effective shear magnitudes would support a supercell or organized multicell risk. Steepening mid-level lapse rates, and supportive shear could favor some hail, while drier low-levels suggest damaging gusts are possible. ...Pacific Northwest... Ahead of the upper low moving onshore over the Northwest, scattered thunderstorms appear likely Monday afternoon and evening. Moderate southwesterly flow will overspread a warm but modestly moist air mass. Given the limited moisture, buoyancy is expected to be fairly weak as well. Still, steep lapse rates and the stronger mid-level flow could support sporadic strong gusts from high-based storms across central OR into southern WA. ..Lyons.. 09/07/2025 Read more

SPC 0600Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1248 AM CDT Sun Sep 07 2025 Valid 081200Z - 091200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS OVER PORTIONS OF THE CENTRAL AND SOUTHERN PLAINS.... ...SUMMARY... Isolated hail and damaging gusts are possible over portions of the central and southern High Plains Monday. ...Synopsis... Northwesterly mid/upper flow will persist over the central U.S., flanked by an upper ridge over the Rockies and an upper trough from the Great Lakes to central Gulf Coast. An embedded shortwave trough will emanate from the central Rockies into the Plains. At the surface, a weak lee low should form over the Dakotas with a trailing surface trough from the Upper MS Valley into the southern High Plains. Southerly flow will transport low 60s F dewpoints north/northeast within a narrow corridor over portions of the High Plains northeast into the eastern Dakotas and MN. ...Central and Southern Plains... A moderately strong remnant low-level jet will likely be ongoing at the start of the period aiding in modest return flow over the High Plains. One or more clusters of storms may also be ongoing near the apex of the LLJ across KS and NE. A narrow plume of 60s F surface dewpoints will likely extend northward along the lee trough to the low into the Dakotas. Heating of the moistening air mass and ascent from the impinging shortwave moving out of the Rockies will support diurnal destabilization along and east of the trailing lee trough, potentially allowing for re-intensification of the early morning storms. Additional isolated thunderstorm development is also possible by late afternoon along the length of the lee trough. However, strong capping and early-day clouds/remnant convection could limit storm coverage/development. Should storms form/redevelop, moderate buoyancy and increasing northwesterly flow aloft will support some storm organization. Veering wind profiles with around 25-35 kt effective shear magnitudes would support a supercell or organized multicell risk. Steepening mid-level lapse rates, and supportive shear could favor some hail, while drier low-levels suggest damaging gusts are possible. ...Pacific Northwest... Ahead of the upper low moving onshore over the Northwest, scattered thunderstorms appear likely Monday afternoon and evening. Moderate southwesterly flow will overspread a warm but modestly moist air mass. Given the limited moisture, buoyancy is expected to be fairly weak as well. Still, steep lapse rates and the stronger mid-level flow could support sporadic strong gusts from high-based storms across central OR into southern WA. ..Lyons.. 09/07/2025 Read more

SPC 0600Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1248 AM CDT Sun Sep 07 2025 Valid 081200Z - 091200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS OVER PORTIONS OF THE CENTRAL AND SOUTHERN PLAINS.... ...SUMMARY... Isolated hail and damaging gusts are possible over portions of the central and southern High Plains Monday. ...Synopsis... Northwesterly mid/upper flow will persist over the central U.S., flanked by an upper ridge over the Rockies and an upper trough from the Great Lakes to central Gulf Coast. An embedded shortwave trough will emanate from the central Rockies into the Plains. At the surface, a weak lee low should form over the Dakotas with a trailing surface trough from the Upper MS Valley into the southern High Plains. Southerly flow will transport low 60s F dewpoints north/northeast within a narrow corridor over portions of the High Plains northeast into the eastern Dakotas and MN. ...Central and Southern Plains... A moderately strong remnant low-level jet will likely be ongoing at the start of the period aiding in modest return flow over the High Plains. One or more clusters of storms may also be ongoing near the apex of the LLJ across KS and NE. A narrow plume of 60s F surface dewpoints will likely extend northward along the lee trough to the low into the Dakotas. Heating of the moistening air mass and ascent from the impinging shortwave moving out of the Rockies will support diurnal destabilization along and east of the trailing lee trough, potentially allowing for re-intensification of the early morning storms. Additional isolated thunderstorm development is also possible by late afternoon along the length of the lee trough. However, strong capping and early-day clouds/remnant convection could limit storm coverage/development. Should storms form/redevelop, moderate buoyancy and increasing northwesterly flow aloft will support some storm organization. Veering wind profiles with around 25-35 kt effective shear magnitudes would support a supercell or organized multicell risk. Steepening mid-level lapse rates, and supportive shear could favor some hail, while drier low-levels suggest damaging gusts are possible. ...Pacific Northwest... Ahead of the upper low moving onshore over the Northwest, scattered thunderstorms appear likely Monday afternoon and evening. Moderate southwesterly flow will overspread a warm but modestly moist air mass. Given the limited moisture, buoyancy is expected to be fairly weak as well. Still, steep lapse rates and the stronger mid-level flow could support sporadic strong gusts from high-based storms across central OR into southern WA. ..Lyons.. 09/07/2025 Read more

SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1219 AM CDT Sun Sep 07 2025 Valid 071200Z - 081200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS OF THE CENTRAL AND SOUTHERN HIGH PLAINS... ...SUMMARY... Some wind and hail risk is expected with thunderstorms across portions of the central and southern High Plains. ...Central/Southern High Plains... A few notable disturbances will top the western U.S. ridge and dig southeast toward the central High Plains later today. Modest midlevel flow will be noted across this region, and a LLJ is expected to respond and increase from the TX Panhandle across western KS during the evening. Latest model guidance depicts strong boundary-layer heating across eastern NM/CO which should allow surface temperatures to warm into the lower 80s. Forecast soundings suggest convective temperatures will be breached by 22z and steep low-level lapse rates will prove beneficial for scattered thunderstorm development by late afternoon. 0-6km bulk shear is expected to be on the order of 35kt, so a few organized updrafts may take on supercell characteristics. If so, isolated hail and gusty winds are possible. Increasing LLJ after sunset favors this activity spreading southeast toward western KS and the OK/TX Panhandles. ..Darrow/Squitieri.. 09/07/2025 Read more

SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1219 AM CDT Sun Sep 07 2025 Valid 071200Z - 081200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS OF THE CENTRAL AND SOUTHERN HIGH PLAINS... ...SUMMARY... Some wind and hail risk is expected with thunderstorms across portions of the central and southern High Plains. ...Central/Southern High Plains... A few notable disturbances will top the western U.S. ridge and dig southeast toward the central High Plains later today. Modest midlevel flow will be noted across this region, and a LLJ is expected to respond and increase from the TX Panhandle across western KS during the evening. Latest model guidance depicts strong boundary-layer heating across eastern NM/CO which should allow surface temperatures to warm into the lower 80s. Forecast soundings suggest convective temperatures will be breached by 22z and steep low-level lapse rates will prove beneficial for scattered thunderstorm development by late afternoon. 0-6km bulk shear is expected to be on the order of 35kt, so a few organized updrafts may take on supercell characteristics. If so, isolated hail and gusty winds are possible. Increasing LLJ after sunset favors this activity spreading southeast toward western KS and the OK/TX Panhandles. ..Darrow/Squitieri.. 09/07/2025 Read more

SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1219 AM CDT Sun Sep 07 2025 Valid 071200Z - 081200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS OF THE CENTRAL AND SOUTHERN HIGH PLAINS... ...SUMMARY... Some wind and hail risk is expected with thunderstorms across portions of the central and southern High Plains. ...Central/Southern High Plains... A few notable disturbances will top the western U.S. ridge and dig southeast toward the central High Plains later today. Modest midlevel flow will be noted across this region, and a LLJ is expected to respond and increase from the TX Panhandle across western KS during the evening. Latest model guidance depicts strong boundary-layer heating across eastern NM/CO which should allow surface temperatures to warm into the lower 80s. Forecast soundings suggest convective temperatures will be breached by 22z and steep low-level lapse rates will prove beneficial for scattered thunderstorm development by late afternoon. 0-6km bulk shear is expected to be on the order of 35kt, so a few organized updrafts may take on supercell characteristics. If so, isolated hail and gusty winds are possible. Increasing LLJ after sunset favors this activity spreading southeast toward western KS and the OK/TX Panhandles. ..Darrow/Squitieri.. 09/07/2025 Read more

SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1219 AM CDT Sun Sep 07 2025 Valid 071200Z - 081200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS OF THE CENTRAL AND SOUTHERN HIGH PLAINS... ...SUMMARY... Some wind and hail risk is expected with thunderstorms across portions of the central and southern High Plains. ...Central/Southern High Plains... A few notable disturbances will top the western U.S. ridge and dig southeast toward the central High Plains later today. Modest midlevel flow will be noted across this region, and a LLJ is expected to respond and increase from the TX Panhandle across western KS during the evening. Latest model guidance depicts strong boundary-layer heating across eastern NM/CO which should allow surface temperatures to warm into the lower 80s. Forecast soundings suggest convective temperatures will be breached by 22z and steep low-level lapse rates will prove beneficial for scattered thunderstorm development by late afternoon. 0-6km bulk shear is expected to be on the order of 35kt, so a few organized updrafts may take on supercell characteristics. If so, isolated hail and gusty winds are possible. Increasing LLJ after sunset favors this activity spreading southeast toward western KS and the OK/TX Panhandles. ..Darrow/Squitieri.. 09/07/2025 Read more

SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1219 AM CDT Sun Sep 07 2025 Valid 071200Z - 081200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS OF THE CENTRAL AND SOUTHERN HIGH PLAINS... ...SUMMARY... Some wind and hail risk is expected with thunderstorms across portions of the central and southern High Plains. ...Central/Southern High Plains... A few notable disturbances will top the western U.S. ridge and dig southeast toward the central High Plains later today. Modest midlevel flow will be noted across this region, and a LLJ is expected to respond and increase from the TX Panhandle across western KS during the evening. Latest model guidance depicts strong boundary-layer heating across eastern NM/CO which should allow surface temperatures to warm into the lower 80s. Forecast soundings suggest convective temperatures will be breached by 22z and steep low-level lapse rates will prove beneficial for scattered thunderstorm development by late afternoon. 0-6km bulk shear is expected to be on the order of 35kt, so a few organized updrafts may take on supercell characteristics. If so, isolated hail and gusty winds are possible. Increasing LLJ after sunset favors this activity spreading southeast toward western KS and the OK/TX Panhandles. ..Darrow/Squitieri.. 09/07/2025 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0725 PM CDT Sat Sep 06 2025 Valid 070100Z - 071200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Organized severe thunderstorms are not forecast tonight. ...01z Update... Great Lakes/OH Valley upper trough is progressing steadily east early this evening. Synoptic cold front is advancing toward the Atlantic Coast but frontal convection is decidedly weaker as pre frontal buoyancy is not that great, and now suppressed toward lower latitudes, well south of stronger deep-layer shear. Thunderstorms should gradually weaken over the next few hours as boundary layer continues to cool. Isolated thunderstorms will also linger across much of the western U.S. from the southern Rockies, across the Great Basin, into WA/OR. While a few robust storms may be noted for the next few hours, aside from locally gusty winds this activity too should weaken with boundary layer cooling. ..Darrow.. 09/07/2025 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0725 PM CDT Sat Sep 06 2025 Valid 070100Z - 071200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Organized severe thunderstorms are not forecast tonight. ...01z Update... Great Lakes/OH Valley upper trough is progressing steadily east early this evening. Synoptic cold front is advancing toward the Atlantic Coast but frontal convection is decidedly weaker as pre frontal buoyancy is not that great, and now suppressed toward lower latitudes, well south of stronger deep-layer shear. Thunderstorms should gradually weaken over the next few hours as boundary layer continues to cool. Isolated thunderstorms will also linger across much of the western U.S. from the southern Rockies, across the Great Basin, into WA/OR. While a few robust storms may be noted for the next few hours, aside from locally gusty winds this activity too should weaken with boundary layer cooling. ..Darrow.. 09/07/2025 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0725 PM CDT Sat Sep 06 2025 Valid 070100Z - 071200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Organized severe thunderstorms are not forecast tonight. ...01z Update... Great Lakes/OH Valley upper trough is progressing steadily east early this evening. Synoptic cold front is advancing toward the Atlantic Coast but frontal convection is decidedly weaker as pre frontal buoyancy is not that great, and now suppressed toward lower latitudes, well south of stronger deep-layer shear. Thunderstorms should gradually weaken over the next few hours as boundary layer continues to cool. Isolated thunderstorms will also linger across much of the western U.S. from the southern Rockies, across the Great Basin, into WA/OR. While a few robust storms may be noted for the next few hours, aside from locally gusty winds this activity too should weaken with boundary layer cooling. ..Darrow.. 09/07/2025 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0725 PM CDT Sat Sep 06 2025 Valid 070100Z - 071200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Organized severe thunderstorms are not forecast tonight. ...01z Update... Great Lakes/OH Valley upper trough is progressing steadily east early this evening. Synoptic cold front is advancing toward the Atlantic Coast but frontal convection is decidedly weaker as pre frontal buoyancy is not that great, and now suppressed toward lower latitudes, well south of stronger deep-layer shear. Thunderstorms should gradually weaken over the next few hours as boundary layer continues to cool. Isolated thunderstorms will also linger across much of the western U.S. from the southern Rockies, across the Great Basin, into WA/OR. While a few robust storms may be noted for the next few hours, aside from locally gusty winds this activity too should weaken with boundary layer cooling. ..Darrow.. 09/07/2025 Read more

No watches are valid as of Sat Sep 6 23:50:02 UTC 2025.