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SPC 1930Z Day 3 Outlook
Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0209 PM CDT Wed Sep 17 2025 Valid 191200Z - 201200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Organized severe storms are not currently expected on Friday. ...Synopsis... A mid/upper-level trough is forecast to remain in place across the central/northern Plains and Upper Midwest on Friday, as an embedded midlevel cyclone moves eastward across SD. Scattered diurnal storm development will be possible from the ArkLaTex into much of the MS Valley, within a relatively moist and moderately unstable environment. With weak deep-layer flow/shear expected across this region, the threat for organized severe storms currently appears low. Late in the period, elevated storms may develop within a low-level warm advection regime across parts of KS/OK. Farther west, a midlevel shortwave trough is forecast to move from central CA toward the Great Basin, while a broader mid/upper-level trough remains offshore of southern CA. This pattern will favor potential for scattered storms across parts of the Southwest, with at least isolated storm development possible from central/northern CA into adjacent parts of NV. ..Dean.. 09/17/2025 Read more

SPC 1930Z Day 3 Outlook
Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0209 PM CDT Wed Sep 17 2025 Valid 191200Z - 201200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Organized severe storms are not currently expected on Friday. ...Synopsis... A mid/upper-level trough is forecast to remain in place across the central/northern Plains and Upper Midwest on Friday, as an embedded midlevel cyclone moves eastward across SD. Scattered diurnal storm development will be possible from the ArkLaTex into much of the MS Valley, within a relatively moist and moderately unstable environment. With weak deep-layer flow/shear expected across this region, the threat for organized severe storms currently appears low. Late in the period, elevated storms may develop within a low-level warm advection regime across parts of KS/OK. Farther west, a midlevel shortwave trough is forecast to move from central CA toward the Great Basin, while a broader mid/upper-level trough remains offshore of southern CA. This pattern will favor potential for scattered storms across parts of the Southwest, with at least isolated storm development possible from central/northern CA into adjacent parts of NV. ..Dean.. 09/17/2025 Read more

SPC 1930Z Day 3 Outlook
Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0209 PM CDT Wed Sep 17 2025 Valid 191200Z - 201200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Organized severe storms are not currently expected on Friday. ...Synopsis... A mid/upper-level trough is forecast to remain in place across the central/northern Plains and Upper Midwest on Friday, as an embedded midlevel cyclone moves eastward across SD. Scattered diurnal storm development will be possible from the ArkLaTex into much of the MS Valley, within a relatively moist and moderately unstable environment. With weak deep-layer flow/shear expected across this region, the threat for organized severe storms currently appears low. Late in the period, elevated storms may develop within a low-level warm advection regime across parts of KS/OK. Farther west, a midlevel shortwave trough is forecast to move from central CA toward the Great Basin, while a broader mid/upper-level trough remains offshore of southern CA. This pattern will favor potential for scattered storms across parts of the Southwest, with at least isolated storm development possible from central/northern CA into adjacent parts of NV. ..Dean.. 09/17/2025 Read more

SPC 1930Z Day 3 Outlook
Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0209 PM CDT Wed Sep 17 2025 Valid 191200Z - 201200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Organized severe storms are not currently expected on Friday. ...Synopsis... A mid/upper-level trough is forecast to remain in place across the central/northern Plains and Upper Midwest on Friday, as an embedded midlevel cyclone moves eastward across SD. Scattered diurnal storm development will be possible from the ArkLaTex into much of the MS Valley, within a relatively moist and moderately unstable environment. With weak deep-layer flow/shear expected across this region, the threat for organized severe storms currently appears low. Late in the period, elevated storms may develop within a low-level warm advection regime across parts of KS/OK. Farther west, a midlevel shortwave trough is forecast to move from central CA toward the Great Basin, while a broader mid/upper-level trough remains offshore of southern CA. This pattern will favor potential for scattered storms across parts of the Southwest, with at least isolated storm development possible from central/northern CA into adjacent parts of NV. ..Dean.. 09/17/2025 Read more

SPC 1930Z Day 3 Outlook
Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0209 PM CDT Wed Sep 17 2025 Valid 191200Z - 201200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Organized severe storms are not currently expected on Friday. ...Synopsis... A mid/upper-level trough is forecast to remain in place across the central/northern Plains and Upper Midwest on Friday, as an embedded midlevel cyclone moves eastward across SD. Scattered diurnal storm development will be possible from the ArkLaTex into much of the MS Valley, within a relatively moist and moderately unstable environment. With weak deep-layer flow/shear expected across this region, the threat for organized severe storms currently appears low. Late in the period, elevated storms may develop within a low-level warm advection regime across parts of KS/OK. Farther west, a midlevel shortwave trough is forecast to move from central CA toward the Great Basin, while a broader mid/upper-level trough remains offshore of southern CA. This pattern will favor potential for scattered storms across parts of the Southwest, with at least isolated storm development possible from central/northern CA into adjacent parts of NV. ..Dean.. 09/17/2025 Read more

SPC 1930Z Day 3 Outlook
Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0209 PM CDT Wed Sep 17 2025 Valid 191200Z - 201200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Organized severe storms are not currently expected on Friday. ...Synopsis... A mid/upper-level trough is forecast to remain in place across the central/northern Plains and Upper Midwest on Friday, as an embedded midlevel cyclone moves eastward across SD. Scattered diurnal storm development will be possible from the ArkLaTex into much of the MS Valley, within a relatively moist and moderately unstable environment. With weak deep-layer flow/shear expected across this region, the threat for organized severe storms currently appears low. Late in the period, elevated storms may develop within a low-level warm advection regime across parts of KS/OK. Farther west, a midlevel shortwave trough is forecast to move from central CA toward the Great Basin, while a broader mid/upper-level trough remains offshore of southern CA. This pattern will favor potential for scattered storms across parts of the Southwest, with at least isolated storm development possible from central/northern CA into adjacent parts of NV. ..Dean.. 09/17/2025 Read more

SPC 1930Z Day 3 Outlook
Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0209 PM CDT Wed Sep 17 2025 Valid 191200Z - 201200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Organized severe storms are not currently expected on Friday. ...Synopsis... A mid/upper-level trough is forecast to remain in place across the central/northern Plains and Upper Midwest on Friday, as an embedded midlevel cyclone moves eastward across SD. Scattered diurnal storm development will be possible from the ArkLaTex into much of the MS Valley, within a relatively moist and moderately unstable environment. With weak deep-layer flow/shear expected across this region, the threat for organized severe storms currently appears low. Late in the period, elevated storms may develop within a low-level warm advection regime across parts of KS/OK. Farther west, a midlevel shortwave trough is forecast to move from central CA toward the Great Basin, while a broader mid/upper-level trough remains offshore of southern CA. This pattern will favor potential for scattered storms across parts of the Southwest, with at least isolated storm development possible from central/northern CA into adjacent parts of NV. ..Dean.. 09/17/2025 Read more

SPC 1930Z Day 3 Outlook
Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0209 PM CDT Wed Sep 17 2025 Valid 191200Z - 201200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Organized severe storms are not currently expected on Friday. ...Synopsis... A mid/upper-level trough is forecast to remain in place across the central/northern Plains and Upper Midwest on Friday, as an embedded midlevel cyclone moves eastward across SD. Scattered diurnal storm development will be possible from the ArkLaTex into much of the MS Valley, within a relatively moist and moderately unstable environment. With weak deep-layer flow/shear expected across this region, the threat for organized severe storms currently appears low. Late in the period, elevated storms may develop within a low-level warm advection regime across parts of KS/OK. Farther west, a midlevel shortwave trough is forecast to move from central CA toward the Great Basin, while a broader mid/upper-level trough remains offshore of southern CA. This pattern will favor potential for scattered storms across parts of the Southwest, with at least isolated storm development possible from central/northern CA into adjacent parts of NV. ..Dean.. 09/17/2025 Read more

SPC 1930Z Day 3 Outlook
Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0209 PM CDT Wed Sep 17 2025 Valid 191200Z - 201200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Organized severe storms are not currently expected on Friday. ...Synopsis... A mid/upper-level trough is forecast to remain in place across the central/northern Plains and Upper Midwest on Friday, as an embedded midlevel cyclone moves eastward across SD. Scattered diurnal storm development will be possible from the ArkLaTex into much of the MS Valley, within a relatively moist and moderately unstable environment. With weak deep-layer flow/shear expected across this region, the threat for organized severe storms currently appears low. Late in the period, elevated storms may develop within a low-level warm advection regime across parts of KS/OK. Farther west, a midlevel shortwave trough is forecast to move from central CA toward the Great Basin, while a broader mid/upper-level trough remains offshore of southern CA. This pattern will favor potential for scattered storms across parts of the Southwest, with at least isolated storm development possible from central/northern CA into adjacent parts of NV. ..Dean.. 09/17/2025 Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0157 PM CDT Wed Sep 17 2025 Valid 181200Z - 191200Z ...NO CRITICAL AREAS... ...Afternoon update... Predominately wet thunderstorms associated with the remnants of TS Mario are expected over much of central and Southern CA D2/Thursday. More isolated storms may develop across parts of northern CA and southern OR into early D3/Friday. However, weak CAPE and rapidly increasing humidity suggest any risk for lightning ignitions will be short-lived and localized. Thereafter, higher chances of wetting rainfall are expected to continue to temper fuels. Otherwise, no changes were made, overall fire-weather concerns are low. ..Lyons.. 09/17/2025 .PREV DISCUSSION... /ISSUED 0159 AM CDT Wed Sep 17 2025/ ...Synopsis... A mid-level trough will slowly progress eastward across the Plains into the Upper Mississippi Valley while another diffuse upper trough lingers along the West Coast, and upper ridging persists over the Ohio Valley tomorrow (Thursday). Another day of quiescent fire weather conditions is in store for much of the U.S. west of the Rockies. However, a dry low-level airmass will continue to overspread the Ohio Valley, where fuels continue to dry and appreciable rainfall remains absent. As on Day 1, the surface wind field will be too weak to support rapid wildfire-spread potential. However, the aforementioned dry airmass over dry fuels suggests that localized fire weather conditions may be a concern with the most vulnerable fuel beds. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0157 PM CDT Wed Sep 17 2025 Valid 181200Z - 191200Z ...NO CRITICAL AREAS... ...Afternoon update... Predominately wet thunderstorms associated with the remnants of TS Mario are expected over much of central and Southern CA D2/Thursday. More isolated storms may develop across parts of northern CA and southern OR into early D3/Friday. However, weak CAPE and rapidly increasing humidity suggest any risk for lightning ignitions will be short-lived and localized. Thereafter, higher chances of wetting rainfall are expected to continue to temper fuels. Otherwise, no changes were made, overall fire-weather concerns are low. ..Lyons.. 09/17/2025 .PREV DISCUSSION... /ISSUED 0159 AM CDT Wed Sep 17 2025/ ...Synopsis... A mid-level trough will slowly progress eastward across the Plains into the Upper Mississippi Valley while another diffuse upper trough lingers along the West Coast, and upper ridging persists over the Ohio Valley tomorrow (Thursday). Another day of quiescent fire weather conditions is in store for much of the U.S. west of the Rockies. However, a dry low-level airmass will continue to overspread the Ohio Valley, where fuels continue to dry and appreciable rainfall remains absent. As on Day 1, the surface wind field will be too weak to support rapid wildfire-spread potential. However, the aforementioned dry airmass over dry fuels suggests that localized fire weather conditions may be a concern with the most vulnerable fuel beds. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0157 PM CDT Wed Sep 17 2025 Valid 181200Z - 191200Z ...NO CRITICAL AREAS... ...Afternoon update... Predominately wet thunderstorms associated with the remnants of TS Mario are expected over much of central and Southern CA D2/Thursday. More isolated storms may develop across parts of northern CA and southern OR into early D3/Friday. However, weak CAPE and rapidly increasing humidity suggest any risk for lightning ignitions will be short-lived and localized. Thereafter, higher chances of wetting rainfall are expected to continue to temper fuels. Otherwise, no changes were made, overall fire-weather concerns are low. ..Lyons.. 09/17/2025 .PREV DISCUSSION... /ISSUED 0159 AM CDT Wed Sep 17 2025/ ...Synopsis... A mid-level trough will slowly progress eastward across the Plains into the Upper Mississippi Valley while another diffuse upper trough lingers along the West Coast, and upper ridging persists over the Ohio Valley tomorrow (Thursday). Another day of quiescent fire weather conditions is in store for much of the U.S. west of the Rockies. However, a dry low-level airmass will continue to overspread the Ohio Valley, where fuels continue to dry and appreciable rainfall remains absent. As on Day 1, the surface wind field will be too weak to support rapid wildfire-spread potential. However, the aforementioned dry airmass over dry fuels suggests that localized fire weather conditions may be a concern with the most vulnerable fuel beds. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0157 PM CDT Wed Sep 17 2025 Valid 181200Z - 191200Z ...NO CRITICAL AREAS... ...Afternoon update... Predominately wet thunderstorms associated with the remnants of TS Mario are expected over much of central and Southern CA D2/Thursday. More isolated storms may develop across parts of northern CA and southern OR into early D3/Friday. However, weak CAPE and rapidly increasing humidity suggest any risk for lightning ignitions will be short-lived and localized. Thereafter, higher chances of wetting rainfall are expected to continue to temper fuels. Otherwise, no changes were made, overall fire-weather concerns are low. ..Lyons.. 09/17/2025 .PREV DISCUSSION... /ISSUED 0159 AM CDT Wed Sep 17 2025/ ...Synopsis... A mid-level trough will slowly progress eastward across the Plains into the Upper Mississippi Valley while another diffuse upper trough lingers along the West Coast, and upper ridging persists over the Ohio Valley tomorrow (Thursday). Another day of quiescent fire weather conditions is in store for much of the U.S. west of the Rockies. However, a dry low-level airmass will continue to overspread the Ohio Valley, where fuels continue to dry and appreciable rainfall remains absent. As on Day 1, the surface wind field will be too weak to support rapid wildfire-spread potential. However, the aforementioned dry airmass over dry fuels suggests that localized fire weather conditions may be a concern with the most vulnerable fuel beds. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0157 PM CDT Wed Sep 17 2025 Valid 181200Z - 191200Z ...NO CRITICAL AREAS... ...Afternoon update... Predominately wet thunderstorms associated with the remnants of TS Mario are expected over much of central and Southern CA D2/Thursday. More isolated storms may develop across parts of northern CA and southern OR into early D3/Friday. However, weak CAPE and rapidly increasing humidity suggest any risk for lightning ignitions will be short-lived and localized. Thereafter, higher chances of wetting rainfall are expected to continue to temper fuels. Otherwise, no changes were made, overall fire-weather concerns are low. ..Lyons.. 09/17/2025 .PREV DISCUSSION... /ISSUED 0159 AM CDT Wed Sep 17 2025/ ...Synopsis... A mid-level trough will slowly progress eastward across the Plains into the Upper Mississippi Valley while another diffuse upper trough lingers along the West Coast, and upper ridging persists over the Ohio Valley tomorrow (Thursday). Another day of quiescent fire weather conditions is in store for much of the U.S. west of the Rockies. However, a dry low-level airmass will continue to overspread the Ohio Valley, where fuels continue to dry and appreciable rainfall remains absent. As on Day 1, the surface wind field will be too weak to support rapid wildfire-spread potential. However, the aforementioned dry airmass over dry fuels suggests that localized fire weather conditions may be a concern with the most vulnerable fuel beds. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0157 PM CDT Wed Sep 17 2025 Valid 181200Z - 191200Z ...NO CRITICAL AREAS... ...Afternoon update... Predominately wet thunderstorms associated with the remnants of TS Mario are expected over much of central and Southern CA D2/Thursday. More isolated storms may develop across parts of northern CA and southern OR into early D3/Friday. However, weak CAPE and rapidly increasing humidity suggest any risk for lightning ignitions will be short-lived and localized. Thereafter, higher chances of wetting rainfall are expected to continue to temper fuels. Otherwise, no changes were made, overall fire-weather concerns are low. ..Lyons.. 09/17/2025 .PREV DISCUSSION... /ISSUED 0159 AM CDT Wed Sep 17 2025/ ...Synopsis... A mid-level trough will slowly progress eastward across the Plains into the Upper Mississippi Valley while another diffuse upper trough lingers along the West Coast, and upper ridging persists over the Ohio Valley tomorrow (Thursday). Another day of quiescent fire weather conditions is in store for much of the U.S. west of the Rockies. However, a dry low-level airmass will continue to overspread the Ohio Valley, where fuels continue to dry and appreciable rainfall remains absent. As on Day 1, the surface wind field will be too weak to support rapid wildfire-spread potential. However, the aforementioned dry airmass over dry fuels suggests that localized fire weather conditions may be a concern with the most vulnerable fuel beds. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0157 PM CDT Wed Sep 17 2025 Valid 181200Z - 191200Z ...NO CRITICAL AREAS... ...Afternoon update... Predominately wet thunderstorms associated with the remnants of TS Mario are expected over much of central and Southern CA D2/Thursday. More isolated storms may develop across parts of northern CA and southern OR into early D3/Friday. However, weak CAPE and rapidly increasing humidity suggest any risk for lightning ignitions will be short-lived and localized. Thereafter, higher chances of wetting rainfall are expected to continue to temper fuels. Otherwise, no changes were made, overall fire-weather concerns are low. ..Lyons.. 09/17/2025 .PREV DISCUSSION... /ISSUED 0159 AM CDT Wed Sep 17 2025/ ...Synopsis... A mid-level trough will slowly progress eastward across the Plains into the Upper Mississippi Valley while another diffuse upper trough lingers along the West Coast, and upper ridging persists over the Ohio Valley tomorrow (Thursday). Another day of quiescent fire weather conditions is in store for much of the U.S. west of the Rockies. However, a dry low-level airmass will continue to overspread the Ohio Valley, where fuels continue to dry and appreciable rainfall remains absent. As on Day 1, the surface wind field will be too weak to support rapid wildfire-spread potential. However, the aforementioned dry airmass over dry fuels suggests that localized fire weather conditions may be a concern with the most vulnerable fuel beds. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0157 PM CDT Wed Sep 17 2025 Valid 181200Z - 191200Z ...NO CRITICAL AREAS... ...Afternoon update... Predominately wet thunderstorms associated with the remnants of TS Mario are expected over much of central and Southern CA D2/Thursday. More isolated storms may develop across parts of northern CA and southern OR into early D3/Friday. However, weak CAPE and rapidly increasing humidity suggest any risk for lightning ignitions will be short-lived and localized. Thereafter, higher chances of wetting rainfall are expected to continue to temper fuels. Otherwise, no changes were made, overall fire-weather concerns are low. ..Lyons.. 09/17/2025 .PREV DISCUSSION... /ISSUED 0159 AM CDT Wed Sep 17 2025/ ...Synopsis... A mid-level trough will slowly progress eastward across the Plains into the Upper Mississippi Valley while another diffuse upper trough lingers along the West Coast, and upper ridging persists over the Ohio Valley tomorrow (Thursday). Another day of quiescent fire weather conditions is in store for much of the U.S. west of the Rockies. However, a dry low-level airmass will continue to overspread the Ohio Valley, where fuels continue to dry and appreciable rainfall remains absent. As on Day 1, the surface wind field will be too weak to support rapid wildfire-spread potential. However, the aforementioned dry airmass over dry fuels suggests that localized fire weather conditions may be a concern with the most vulnerable fuel beds. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0157 PM CDT Wed Sep 17 2025 Valid 181200Z - 191200Z ...NO CRITICAL AREAS... ...Afternoon update... Predominately wet thunderstorms associated with the remnants of TS Mario are expected over much of central and Southern CA D2/Thursday. More isolated storms may develop across parts of northern CA and southern OR into early D3/Friday. However, weak CAPE and rapidly increasing humidity suggest any risk for lightning ignitions will be short-lived and localized. Thereafter, higher chances of wetting rainfall are expected to continue to temper fuels. Otherwise, no changes were made, overall fire-weather concerns are low. ..Lyons.. 09/17/2025 .PREV DISCUSSION... /ISSUED 0159 AM CDT Wed Sep 17 2025/ ...Synopsis... A mid-level trough will slowly progress eastward across the Plains into the Upper Mississippi Valley while another diffuse upper trough lingers along the West Coast, and upper ridging persists over the Ohio Valley tomorrow (Thursday). Another day of quiescent fire weather conditions is in store for much of the U.S. west of the Rockies. However, a dry low-level airmass will continue to overspread the Ohio Valley, where fuels continue to dry and appreciable rainfall remains absent. As on Day 1, the surface wind field will be too weak to support rapid wildfire-spread potential. However, the aforementioned dry airmass over dry fuels suggests that localized fire weather conditions may be a concern with the most vulnerable fuel beds. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0157 PM CDT Wed Sep 17 2025 Valid 181200Z - 191200Z ...NO CRITICAL AREAS... ...Afternoon update... Predominately wet thunderstorms associated with the remnants of TS Mario are expected over much of central and Southern CA D2/Thursday. More isolated storms may develop across parts of northern CA and southern OR into early D3/Friday. However, weak CAPE and rapidly increasing humidity suggest any risk for lightning ignitions will be short-lived and localized. Thereafter, higher chances of wetting rainfall are expected to continue to temper fuels. Otherwise, no changes were made, overall fire-weather concerns are low. ..Lyons.. 09/17/2025 .PREV DISCUSSION... /ISSUED 0159 AM CDT Wed Sep 17 2025/ ...Synopsis... A mid-level trough will slowly progress eastward across the Plains into the Upper Mississippi Valley while another diffuse upper trough lingers along the West Coast, and upper ridging persists over the Ohio Valley tomorrow (Thursday). Another day of quiescent fire weather conditions is in store for much of the U.S. west of the Rockies. However, a dry low-level airmass will continue to overspread the Ohio Valley, where fuels continue to dry and appreciable rainfall remains absent. As on Day 1, the surface wind field will be too weak to support rapid wildfire-spread potential. However, the aforementioned dry airmass over dry fuels suggests that localized fire weather conditions may be a concern with the most vulnerable fuel beds. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0157 PM CDT Wed Sep 17 2025 Valid 181200Z - 191200Z ...NO CRITICAL AREAS... ...Afternoon update... Predominately wet thunderstorms associated with the remnants of TS Mario are expected over much of central and Southern CA D2/Thursday. More isolated storms may develop across parts of northern CA and southern OR into early D3/Friday. However, weak CAPE and rapidly increasing humidity suggest any risk for lightning ignitions will be short-lived and localized. Thereafter, higher chances of wetting rainfall are expected to continue to temper fuels. Otherwise, no changes were made, overall fire-weather concerns are low. ..Lyons.. 09/17/2025 .PREV DISCUSSION... /ISSUED 0159 AM CDT Wed Sep 17 2025/ ...Synopsis... A mid-level trough will slowly progress eastward across the Plains into the Upper Mississippi Valley while another diffuse upper trough lingers along the West Coast, and upper ridging persists over the Ohio Valley tomorrow (Thursday). Another day of quiescent fire weather conditions is in store for much of the U.S. west of the Rockies. However, a dry low-level airmass will continue to overspread the Ohio Valley, where fuels continue to dry and appreciable rainfall remains absent. As on Day 1, the surface wind field will be too weak to support rapid wildfire-spread potential. However, the aforementioned dry airmass over dry fuels suggests that localized fire weather conditions may be a concern with the most vulnerable fuel beds. ...Please see www.spc.noaa.gov/fire for graphic product... Read more