Severe Storms

SPC 1730Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1210 PM CDT Sun Jun 29 2025 Valid 301200Z - 011200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS FOR PARTS OF THE MIDWEST INTO THE OHIO VALLEY...THE MID-ATLANTIC...AND ALONG THE CALIFORNIA/OREGON BORDER... ...SUMMARY... Scattered strong to severe thunderstorms remain possible across parts of the Ohio Valley, Midwest and the Mid-Atlantic tomorrow (Monday). A couple of severe thunderstorms also cannot be ruled out over parts of the Pacific Northwest. ...Synopsis... A mid-level trough will amplify while traversing the Great Lakes and Ohio Valley regions, as upper ridging builds over the Plains states and an upper-level low impinges on the California coastline tomorrow (Monday). A cold front will accompany the Midwest mid-level trough, and is poised to progress across the Mid-MS and OH Valley regions while draping across the southern Plains through the day. In advance of the cold front, adequate moisture and overall instability will be present to support at least scattered thunderstorms. Given the presence of modest vertical wind shear, a few of the storms could become strong to locally severe. Thunderstorms may also develop north of a surface low along the CA/OR border, amid an unstable airmass supportive of scattered strong thunderstorms. ...Midwest into the OH Valley... Preceding an advancing cold front, diurnal heating of a moist boundary layer, atop relatively poor mid-level lapse rates, will result in airmass destabilization and 1500-3000 J/kg SBCAPE by afternoon. While MLCINH will minimize by late morning, the poor mid-level lapse rates suggest that CAPE should be constrained to tall/thin profiles. Furthermore, unidirectional vertical wind profiles with little strengthening with height, should lead to mediocre deep-layer shear. While many scattered storms should develop along the cold front, and ahead in the uncapped warm sector, most storms should be pulse-cellular to multicellular in nature. A few of the stronger storms may support wet downbursts capable of producing localized damaging gusts. ...Mid-Atlantic... Similar to the Great Lakes/OH Valley vicinity, strong boundary-layer heating will quickly reduce convective inhibition and support scattered thunderstorm development amid weak vertical wind shear. 2000+ J/kg of tall/thin SBCAPE will support wet downburst potential, and a couple of damaging wind gusts are possible. ...Southern Plains... Scattered thunderstorms should develop by afternoon peak heating ahead of the trailing cold front over the southern Plains. Surface temperatures should warm to near 90 F amid low to mid 70s F dewpoints, yielding as much as 3000-4000 J/kg MLCAPE given modest mid-level lapse rates. Though vertical wind shear should be relatively poor, the strong buoyancy in place may compensate to support wet downbursts and associated isolated severe gusts with the stronger storms. ...Northern California into Southern Oregon... Scattered thunderstorms will develop immediately north of a weak surface low, where localized forcing for ascent will be in place. These thunderstorms should develop atop a mixed boundary layer that may deepen to 600-500 mb. Furthermore, the presence of 9+ C/km lapse rates through the troposphere may promote enough thermodynamically-driven downward momentum transport to support isolated strong to severe wind gusts. Point forecast soundings also depict curved/elongated hodographs, which may support multicells and transient supercells with a marginal hail threat. ..Squitieri.. 06/29/2025 Read more

SPC 1730Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1210 PM CDT Sun Jun 29 2025 Valid 301200Z - 011200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS FOR PARTS OF THE MIDWEST INTO THE OHIO VALLEY...THE MID-ATLANTIC...AND ALONG THE CALIFORNIA/OREGON BORDER... ...SUMMARY... Scattered strong to severe thunderstorms remain possible across parts of the Ohio Valley, Midwest and the Mid-Atlantic tomorrow (Monday). A couple of severe thunderstorms also cannot be ruled out over parts of the Pacific Northwest. ...Synopsis... A mid-level trough will amplify while traversing the Great Lakes and Ohio Valley regions, as upper ridging builds over the Plains states and an upper-level low impinges on the California coastline tomorrow (Monday). A cold front will accompany the Midwest mid-level trough, and is poised to progress across the Mid-MS and OH Valley regions while draping across the southern Plains through the day. In advance of the cold front, adequate moisture and overall instability will be present to support at least scattered thunderstorms. Given the presence of modest vertical wind shear, a few of the storms could become strong to locally severe. Thunderstorms may also develop north of a surface low along the CA/OR border, amid an unstable airmass supportive of scattered strong thunderstorms. ...Midwest into the OH Valley... Preceding an advancing cold front, diurnal heating of a moist boundary layer, atop relatively poor mid-level lapse rates, will result in airmass destabilization and 1500-3000 J/kg SBCAPE by afternoon. While MLCINH will minimize by late morning, the poor mid-level lapse rates suggest that CAPE should be constrained to tall/thin profiles. Furthermore, unidirectional vertical wind profiles with little strengthening with height, should lead to mediocre deep-layer shear. While many scattered storms should develop along the cold front, and ahead in the uncapped warm sector, most storms should be pulse-cellular to multicellular in nature. A few of the stronger storms may support wet downbursts capable of producing localized damaging gusts. ...Mid-Atlantic... Similar to the Great Lakes/OH Valley vicinity, strong boundary-layer heating will quickly reduce convective inhibition and support scattered thunderstorm development amid weak vertical wind shear. 2000+ J/kg of tall/thin SBCAPE will support wet downburst potential, and a couple of damaging wind gusts are possible. ...Southern Plains... Scattered thunderstorms should develop by afternoon peak heating ahead of the trailing cold front over the southern Plains. Surface temperatures should warm to near 90 F amid low to mid 70s F dewpoints, yielding as much as 3000-4000 J/kg MLCAPE given modest mid-level lapse rates. Though vertical wind shear should be relatively poor, the strong buoyancy in place may compensate to support wet downbursts and associated isolated severe gusts with the stronger storms. ...Northern California into Southern Oregon... Scattered thunderstorms will develop immediately north of a weak surface low, where localized forcing for ascent will be in place. These thunderstorms should develop atop a mixed boundary layer that may deepen to 600-500 mb. Furthermore, the presence of 9+ C/km lapse rates through the troposphere may promote enough thermodynamically-driven downward momentum transport to support isolated strong to severe wind gusts. Point forecast soundings also depict curved/elongated hodographs, which may support multicells and transient supercells with a marginal hail threat. ..Squitieri.. 06/29/2025 Read more

SPC 1730Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1210 PM CDT Sun Jun 29 2025 Valid 301200Z - 011200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS FOR PARTS OF THE MIDWEST INTO THE OHIO VALLEY...THE MID-ATLANTIC...AND ALONG THE CALIFORNIA/OREGON BORDER... ...SUMMARY... Scattered strong to severe thunderstorms remain possible across parts of the Ohio Valley, Midwest and the Mid-Atlantic tomorrow (Monday). A couple of severe thunderstorms also cannot be ruled out over parts of the Pacific Northwest. ...Synopsis... A mid-level trough will amplify while traversing the Great Lakes and Ohio Valley regions, as upper ridging builds over the Plains states and an upper-level low impinges on the California coastline tomorrow (Monday). A cold front will accompany the Midwest mid-level trough, and is poised to progress across the Mid-MS and OH Valley regions while draping across the southern Plains through the day. In advance of the cold front, adequate moisture and overall instability will be present to support at least scattered thunderstorms. Given the presence of modest vertical wind shear, a few of the storms could become strong to locally severe. Thunderstorms may also develop north of a surface low along the CA/OR border, amid an unstable airmass supportive of scattered strong thunderstorms. ...Midwest into the OH Valley... Preceding an advancing cold front, diurnal heating of a moist boundary layer, atop relatively poor mid-level lapse rates, will result in airmass destabilization and 1500-3000 J/kg SBCAPE by afternoon. While MLCINH will minimize by late morning, the poor mid-level lapse rates suggest that CAPE should be constrained to tall/thin profiles. Furthermore, unidirectional vertical wind profiles with little strengthening with height, should lead to mediocre deep-layer shear. While many scattered storms should develop along the cold front, and ahead in the uncapped warm sector, most storms should be pulse-cellular to multicellular in nature. A few of the stronger storms may support wet downbursts capable of producing localized damaging gusts. ...Mid-Atlantic... Similar to the Great Lakes/OH Valley vicinity, strong boundary-layer heating will quickly reduce convective inhibition and support scattered thunderstorm development amid weak vertical wind shear. 2000+ J/kg of tall/thin SBCAPE will support wet downburst potential, and a couple of damaging wind gusts are possible. ...Southern Plains... Scattered thunderstorms should develop by afternoon peak heating ahead of the trailing cold front over the southern Plains. Surface temperatures should warm to near 90 F amid low to mid 70s F dewpoints, yielding as much as 3000-4000 J/kg MLCAPE given modest mid-level lapse rates. Though vertical wind shear should be relatively poor, the strong buoyancy in place may compensate to support wet downbursts and associated isolated severe gusts with the stronger storms. ...Northern California into Southern Oregon... Scattered thunderstorms will develop immediately north of a weak surface low, where localized forcing for ascent will be in place. These thunderstorms should develop atop a mixed boundary layer that may deepen to 600-500 mb. Furthermore, the presence of 9+ C/km lapse rates through the troposphere may promote enough thermodynamically-driven downward momentum transport to support isolated strong to severe wind gusts. Point forecast soundings also depict curved/elongated hodographs, which may support multicells and transient supercells with a marginal hail threat. ..Squitieri.. 06/29/2025 Read more

SPC 1730Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1210 PM CDT Sun Jun 29 2025 Valid 301200Z - 011200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS FOR PARTS OF THE MIDWEST INTO THE OHIO VALLEY...THE MID-ATLANTIC...AND ALONG THE CALIFORNIA/OREGON BORDER... ...SUMMARY... Scattered strong to severe thunderstorms remain possible across parts of the Ohio Valley, Midwest and the Mid-Atlantic tomorrow (Monday). A couple of severe thunderstorms also cannot be ruled out over parts of the Pacific Northwest. ...Synopsis... A mid-level trough will amplify while traversing the Great Lakes and Ohio Valley regions, as upper ridging builds over the Plains states and an upper-level low impinges on the California coastline tomorrow (Monday). A cold front will accompany the Midwest mid-level trough, and is poised to progress across the Mid-MS and OH Valley regions while draping across the southern Plains through the day. In advance of the cold front, adequate moisture and overall instability will be present to support at least scattered thunderstorms. Given the presence of modest vertical wind shear, a few of the storms could become strong to locally severe. Thunderstorms may also develop north of a surface low along the CA/OR border, amid an unstable airmass supportive of scattered strong thunderstorms. ...Midwest into the OH Valley... Preceding an advancing cold front, diurnal heating of a moist boundary layer, atop relatively poor mid-level lapse rates, will result in airmass destabilization and 1500-3000 J/kg SBCAPE by afternoon. While MLCINH will minimize by late morning, the poor mid-level lapse rates suggest that CAPE should be constrained to tall/thin profiles. Furthermore, unidirectional vertical wind profiles with little strengthening with height, should lead to mediocre deep-layer shear. While many scattered storms should develop along the cold front, and ahead in the uncapped warm sector, most storms should be pulse-cellular to multicellular in nature. A few of the stronger storms may support wet downbursts capable of producing localized damaging gusts. ...Mid-Atlantic... Similar to the Great Lakes/OH Valley vicinity, strong boundary-layer heating will quickly reduce convective inhibition and support scattered thunderstorm development amid weak vertical wind shear. 2000+ J/kg of tall/thin SBCAPE will support wet downburst potential, and a couple of damaging wind gusts are possible. ...Southern Plains... Scattered thunderstorms should develop by afternoon peak heating ahead of the trailing cold front over the southern Plains. Surface temperatures should warm to near 90 F amid low to mid 70s F dewpoints, yielding as much as 3000-4000 J/kg MLCAPE given modest mid-level lapse rates. Though vertical wind shear should be relatively poor, the strong buoyancy in place may compensate to support wet downbursts and associated isolated severe gusts with the stronger storms. ...Northern California into Southern Oregon... Scattered thunderstorms will develop immediately north of a weak surface low, where localized forcing for ascent will be in place. These thunderstorms should develop atop a mixed boundary layer that may deepen to 600-500 mb. Furthermore, the presence of 9+ C/km lapse rates through the troposphere may promote enough thermodynamically-driven downward momentum transport to support isolated strong to severe wind gusts. Point forecast soundings also depict curved/elongated hodographs, which may support multicells and transient supercells with a marginal hail threat. ..Squitieri.. 06/29/2025 Read more

SPC 1730Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1210 PM CDT Sun Jun 29 2025 Valid 301200Z - 011200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS FOR PARTS OF THE MIDWEST INTO THE OHIO VALLEY...THE MID-ATLANTIC...AND ALONG THE CALIFORNIA/OREGON BORDER... ...SUMMARY... Scattered strong to severe thunderstorms remain possible across parts of the Ohio Valley, Midwest and the Mid-Atlantic tomorrow (Monday). A couple of severe thunderstorms also cannot be ruled out over parts of the Pacific Northwest. ...Synopsis... A mid-level trough will amplify while traversing the Great Lakes and Ohio Valley regions, as upper ridging builds over the Plains states and an upper-level low impinges on the California coastline tomorrow (Monday). A cold front will accompany the Midwest mid-level trough, and is poised to progress across the Mid-MS and OH Valley regions while draping across the southern Plains through the day. In advance of the cold front, adequate moisture and overall instability will be present to support at least scattered thunderstorms. Given the presence of modest vertical wind shear, a few of the storms could become strong to locally severe. Thunderstorms may also develop north of a surface low along the CA/OR border, amid an unstable airmass supportive of scattered strong thunderstorms. ...Midwest into the OH Valley... Preceding an advancing cold front, diurnal heating of a moist boundary layer, atop relatively poor mid-level lapse rates, will result in airmass destabilization and 1500-3000 J/kg SBCAPE by afternoon. While MLCINH will minimize by late morning, the poor mid-level lapse rates suggest that CAPE should be constrained to tall/thin profiles. Furthermore, unidirectional vertical wind profiles with little strengthening with height, should lead to mediocre deep-layer shear. While many scattered storms should develop along the cold front, and ahead in the uncapped warm sector, most storms should be pulse-cellular to multicellular in nature. A few of the stronger storms may support wet downbursts capable of producing localized damaging gusts. ...Mid-Atlantic... Similar to the Great Lakes/OH Valley vicinity, strong boundary-layer heating will quickly reduce convective inhibition and support scattered thunderstorm development amid weak vertical wind shear. 2000+ J/kg of tall/thin SBCAPE will support wet downburst potential, and a couple of damaging wind gusts are possible. ...Southern Plains... Scattered thunderstorms should develop by afternoon peak heating ahead of the trailing cold front over the southern Plains. Surface temperatures should warm to near 90 F amid low to mid 70s F dewpoints, yielding as much as 3000-4000 J/kg MLCAPE given modest mid-level lapse rates. Though vertical wind shear should be relatively poor, the strong buoyancy in place may compensate to support wet downbursts and associated isolated severe gusts with the stronger storms. ...Northern California into Southern Oregon... Scattered thunderstorms will develop immediately north of a weak surface low, where localized forcing for ascent will be in place. These thunderstorms should develop atop a mixed boundary layer that may deepen to 600-500 mb. Furthermore, the presence of 9+ C/km lapse rates through the troposphere may promote enough thermodynamically-driven downward momentum transport to support isolated strong to severe wind gusts. Point forecast soundings also depict curved/elongated hodographs, which may support multicells and transient supercells with a marginal hail threat. ..Squitieri.. 06/29/2025 Read more

SPC 1730Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1210 PM CDT Sun Jun 29 2025 Valid 301200Z - 011200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS FOR PARTS OF THE MIDWEST INTO THE OHIO VALLEY...THE MID-ATLANTIC...AND ALONG THE CALIFORNIA/OREGON BORDER... ...SUMMARY... Scattered strong to severe thunderstorms remain possible across parts of the Ohio Valley, Midwest and the Mid-Atlantic tomorrow (Monday). A couple of severe thunderstorms also cannot be ruled out over parts of the Pacific Northwest. ...Synopsis... A mid-level trough will amplify while traversing the Great Lakes and Ohio Valley regions, as upper ridging builds over the Plains states and an upper-level low impinges on the California coastline tomorrow (Monday). A cold front will accompany the Midwest mid-level trough, and is poised to progress across the Mid-MS and OH Valley regions while draping across the southern Plains through the day. In advance of the cold front, adequate moisture and overall instability will be present to support at least scattered thunderstorms. Given the presence of modest vertical wind shear, a few of the storms could become strong to locally severe. Thunderstorms may also develop north of a surface low along the CA/OR border, amid an unstable airmass supportive of scattered strong thunderstorms. ...Midwest into the OH Valley... Preceding an advancing cold front, diurnal heating of a moist boundary layer, atop relatively poor mid-level lapse rates, will result in airmass destabilization and 1500-3000 J/kg SBCAPE by afternoon. While MLCINH will minimize by late morning, the poor mid-level lapse rates suggest that CAPE should be constrained to tall/thin profiles. Furthermore, unidirectional vertical wind profiles with little strengthening with height, should lead to mediocre deep-layer shear. While many scattered storms should develop along the cold front, and ahead in the uncapped warm sector, most storms should be pulse-cellular to multicellular in nature. A few of the stronger storms may support wet downbursts capable of producing localized damaging gusts. ...Mid-Atlantic... Similar to the Great Lakes/OH Valley vicinity, strong boundary-layer heating will quickly reduce convective inhibition and support scattered thunderstorm development amid weak vertical wind shear. 2000+ J/kg of tall/thin SBCAPE will support wet downburst potential, and a couple of damaging wind gusts are possible. ...Southern Plains... Scattered thunderstorms should develop by afternoon peak heating ahead of the trailing cold front over the southern Plains. Surface temperatures should warm to near 90 F amid low to mid 70s F dewpoints, yielding as much as 3000-4000 J/kg MLCAPE given modest mid-level lapse rates. Though vertical wind shear should be relatively poor, the strong buoyancy in place may compensate to support wet downbursts and associated isolated severe gusts with the stronger storms. ...Northern California into Southern Oregon... Scattered thunderstorms will develop immediately north of a weak surface low, where localized forcing for ascent will be in place. These thunderstorms should develop atop a mixed boundary layer that may deepen to 600-500 mb. Furthermore, the presence of 9+ C/km lapse rates through the troposphere may promote enough thermodynamically-driven downward momentum transport to support isolated strong to severe wind gusts. Point forecast soundings also depict curved/elongated hodographs, which may support multicells and transient supercells with a marginal hail threat. ..Squitieri.. 06/29/2025 Read more

SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 1142 AM CDT Sun Jun 29 2025 Valid 291700Z - 301200Z The previous forecast (see below) remains on track with no changes to Elevated highlights across southwestern Wyoming. Locally elevated fire weather conditions are possible across southern Arizona. Drought conditions and above normal fine fuel loading along with sustained west winds of 10-15 mph and relative humidity of 10-15 percent will bring a brief and localized fire weather threat to southern Arizona today. ..Williams.. 06/29/2025 .PREV DISCUSSION... /ISSUED 0204 AM CDT Sun Jun 29 2025/ ...Synopsis... Shortwave troughing over the northern US is forecast to move eastward as sub-tropical ridging begins to build over the West. A weak cold front will move south shifting winds to northwesterly over the Rockies and northern Plains. While weaker than the preceding days, lingering flow aloft will still aid in sustaining breezy northwest winds of 15-20 mph across the Interstate 80 corridor in southwest WY. The winds overlapping with relative humidity in the 15-20 percent range amid very dry fuels will support elevated fire weather conditions across southwest WY. ...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 1142 AM CDT Sun Jun 29 2025 Valid 291700Z - 301200Z The previous forecast (see below) remains on track with no changes to Elevated highlights across southwestern Wyoming. Locally elevated fire weather conditions are possible across southern Arizona. Drought conditions and above normal fine fuel loading along with sustained west winds of 10-15 mph and relative humidity of 10-15 percent will bring a brief and localized fire weather threat to southern Arizona today. ..Williams.. 06/29/2025 .PREV DISCUSSION... /ISSUED 0204 AM CDT Sun Jun 29 2025/ ...Synopsis... Shortwave troughing over the northern US is forecast to move eastward as sub-tropical ridging begins to build over the West. A weak cold front will move south shifting winds to northwesterly over the Rockies and northern Plains. While weaker than the preceding days, lingering flow aloft will still aid in sustaining breezy northwest winds of 15-20 mph across the Interstate 80 corridor in southwest WY. The winds overlapping with relative humidity in the 15-20 percent range amid very dry fuels will support elevated fire weather conditions across southwest WY. ...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 1142 AM CDT Sun Jun 29 2025 Valid 291700Z - 301200Z The previous forecast (see below) remains on track with no changes to Elevated highlights across southwestern Wyoming. Locally elevated fire weather conditions are possible across southern Arizona. Drought conditions and above normal fine fuel loading along with sustained west winds of 10-15 mph and relative humidity of 10-15 percent will bring a brief and localized fire weather threat to southern Arizona today. ..Williams.. 06/29/2025 .PREV DISCUSSION... /ISSUED 0204 AM CDT Sun Jun 29 2025/ ...Synopsis... Shortwave troughing over the northern US is forecast to move eastward as sub-tropical ridging begins to build over the West. A weak cold front will move south shifting winds to northwesterly over the Rockies and northern Plains. While weaker than the preceding days, lingering flow aloft will still aid in sustaining breezy northwest winds of 15-20 mph across the Interstate 80 corridor in southwest WY. The winds overlapping with relative humidity in the 15-20 percent range amid very dry fuels will support elevated fire weather conditions across southwest WY. ...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 1142 AM CDT Sun Jun 29 2025 Valid 291700Z - 301200Z The previous forecast (see below) remains on track with no changes to Elevated highlights across southwestern Wyoming. Locally elevated fire weather conditions are possible across southern Arizona. Drought conditions and above normal fine fuel loading along with sustained west winds of 10-15 mph and relative humidity of 10-15 percent will bring a brief and localized fire weather threat to southern Arizona today. ..Williams.. 06/29/2025 .PREV DISCUSSION... /ISSUED 0204 AM CDT Sun Jun 29 2025/ ...Synopsis... Shortwave troughing over the northern US is forecast to move eastward as sub-tropical ridging begins to build over the West. A weak cold front will move south shifting winds to northwesterly over the Rockies and northern Plains. While weaker than the preceding days, lingering flow aloft will still aid in sustaining breezy northwest winds of 15-20 mph across the Interstate 80 corridor in southwest WY. The winds overlapping with relative humidity in the 15-20 percent range amid very dry fuels will support elevated fire weather conditions across southwest WY. ...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 1142 AM CDT Sun Jun 29 2025 Valid 291700Z - 301200Z The previous forecast (see below) remains on track with no changes to Elevated highlights across southwestern Wyoming. Locally elevated fire weather conditions are possible across southern Arizona. Drought conditions and above normal fine fuel loading along with sustained west winds of 10-15 mph and relative humidity of 10-15 percent will bring a brief and localized fire weather threat to southern Arizona today. ..Williams.. 06/29/2025 .PREV DISCUSSION... /ISSUED 0204 AM CDT Sun Jun 29 2025/ ...Synopsis... Shortwave troughing over the northern US is forecast to move eastward as sub-tropical ridging begins to build over the West. A weak cold front will move south shifting winds to northwesterly over the Rockies and northern Plains. While weaker than the preceding days, lingering flow aloft will still aid in sustaining breezy northwest winds of 15-20 mph across the Interstate 80 corridor in southwest WY. The winds overlapping with relative humidity in the 15-20 percent range amid very dry fuels will support elevated fire weather conditions across southwest WY. ...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 1142 AM CDT Sun Jun 29 2025 Valid 291700Z - 301200Z The previous forecast (see below) remains on track with no changes to Elevated highlights across southwestern Wyoming. Locally elevated fire weather conditions are possible across southern Arizona. Drought conditions and above normal fine fuel loading along with sustained west winds of 10-15 mph and relative humidity of 10-15 percent will bring a brief and localized fire weather threat to southern Arizona today. ..Williams.. 06/29/2025 .PREV DISCUSSION... /ISSUED 0204 AM CDT Sun Jun 29 2025/ ...Synopsis... Shortwave troughing over the northern US is forecast to move eastward as sub-tropical ridging begins to build over the West. A weak cold front will move south shifting winds to northwesterly over the Rockies and northern Plains. While weaker than the preceding days, lingering flow aloft will still aid in sustaining breezy northwest winds of 15-20 mph across the Interstate 80 corridor in southwest WY. The winds overlapping with relative humidity in the 15-20 percent range amid very dry fuels will support elevated fire weather conditions across southwest WY. ...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 1142 AM CDT Sun Jun 29 2025 Valid 291700Z - 301200Z The previous forecast (see below) remains on track with no changes to Elevated highlights across southwestern Wyoming. Locally elevated fire weather conditions are possible across southern Arizona. Drought conditions and above normal fine fuel loading along with sustained west winds of 10-15 mph and relative humidity of 10-15 percent will bring a brief and localized fire weather threat to southern Arizona today. ..Williams.. 06/29/2025 .PREV DISCUSSION... /ISSUED 0204 AM CDT Sun Jun 29 2025/ ...Synopsis... Shortwave troughing over the northern US is forecast to move eastward as sub-tropical ridging begins to build over the West. A weak cold front will move south shifting winds to northwesterly over the Rockies and northern Plains. While weaker than the preceding days, lingering flow aloft will still aid in sustaining breezy northwest winds of 15-20 mph across the Interstate 80 corridor in southwest WY. The winds overlapping with relative humidity in the 15-20 percent range amid very dry fuels will support elevated fire weather conditions across southwest WY. ...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 1142 AM CDT Sun Jun 29 2025 Valid 291700Z - 301200Z The previous forecast (see below) remains on track with no changes to Elevated highlights across southwestern Wyoming. Locally elevated fire weather conditions are possible across southern Arizona. Drought conditions and above normal fine fuel loading along with sustained west winds of 10-15 mph and relative humidity of 10-15 percent will bring a brief and localized fire weather threat to southern Arizona today. ..Williams.. 06/29/2025 .PREV DISCUSSION... /ISSUED 0204 AM CDT Sun Jun 29 2025/ ...Synopsis... Shortwave troughing over the northern US is forecast to move eastward as sub-tropical ridging begins to build over the West. A weak cold front will move south shifting winds to northwesterly over the Rockies and northern Plains. While weaker than the preceding days, lingering flow aloft will still aid in sustaining breezy northwest winds of 15-20 mph across the Interstate 80 corridor in southwest WY. The winds overlapping with relative humidity in the 15-20 percent range amid very dry fuels will support elevated fire weather conditions across southwest WY. ...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 1142 AM CDT Sun Jun 29 2025 Valid 291700Z - 301200Z The previous forecast (see below) remains on track with no changes to Elevated highlights across southwestern Wyoming. Locally elevated fire weather conditions are possible across southern Arizona. Drought conditions and above normal fine fuel loading along with sustained west winds of 10-15 mph and relative humidity of 10-15 percent will bring a brief and localized fire weather threat to southern Arizona today. ..Williams.. 06/29/2025 .PREV DISCUSSION... /ISSUED 0204 AM CDT Sun Jun 29 2025/ ...Synopsis... Shortwave troughing over the northern US is forecast to move eastward as sub-tropical ridging begins to build over the West. A weak cold front will move south shifting winds to northwesterly over the Rockies and northern Plains. While weaker than the preceding days, lingering flow aloft will still aid in sustaining breezy northwest winds of 15-20 mph across the Interstate 80 corridor in southwest WY. The winds overlapping with relative humidity in the 15-20 percent range amid very dry fuels will support elevated fire weather conditions across southwest WY. ...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 1142 AM CDT Sun Jun 29 2025 Valid 291700Z - 301200Z The previous forecast (see below) remains on track with no changes to Elevated highlights across southwestern Wyoming. Locally elevated fire weather conditions are possible across southern Arizona. Drought conditions and above normal fine fuel loading along with sustained west winds of 10-15 mph and relative humidity of 10-15 percent will bring a brief and localized fire weather threat to southern Arizona today. ..Williams.. 06/29/2025 .PREV DISCUSSION... /ISSUED 0204 AM CDT Sun Jun 29 2025/ ...Synopsis... Shortwave troughing over the northern US is forecast to move eastward as sub-tropical ridging begins to build over the West. A weak cold front will move south shifting winds to northwesterly over the Rockies and northern Plains. While weaker than the preceding days, lingering flow aloft will still aid in sustaining breezy northwest winds of 15-20 mph across the Interstate 80 corridor in southwest WY. The winds overlapping with relative humidity in the 15-20 percent range amid very dry fuels will support elevated fire weather conditions across southwest WY. ...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 1142 AM CDT Sun Jun 29 2025 Valid 291700Z - 301200Z The previous forecast (see below) remains on track with no changes to Elevated highlights across southwestern Wyoming. Locally elevated fire weather conditions are possible across southern Arizona. Drought conditions and above normal fine fuel loading along with sustained west winds of 10-15 mph and relative humidity of 10-15 percent will bring a brief and localized fire weather threat to southern Arizona today. ..Williams.. 06/29/2025 .PREV DISCUSSION... /ISSUED 0204 AM CDT Sun Jun 29 2025/ ...Synopsis... Shortwave troughing over the northern US is forecast to move eastward as sub-tropical ridging begins to build over the West. A weak cold front will move south shifting winds to northwesterly over the Rockies and northern Plains. While weaker than the preceding days, lingering flow aloft will still aid in sustaining breezy northwest winds of 15-20 mph across the Interstate 80 corridor in southwest WY. The winds overlapping with relative humidity in the 15-20 percent range amid very dry fuels will support elevated fire weather conditions across southwest WY. ...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 1142 AM CDT Sun Jun 29 2025 Valid 291700Z - 301200Z The previous forecast (see below) remains on track with no changes to Elevated highlights across southwestern Wyoming. Locally elevated fire weather conditions are possible across southern Arizona. Drought conditions and above normal fine fuel loading along with sustained west winds of 10-15 mph and relative humidity of 10-15 percent will bring a brief and localized fire weather threat to southern Arizona today. ..Williams.. 06/29/2025 .PREV DISCUSSION... /ISSUED 0204 AM CDT Sun Jun 29 2025/ ...Synopsis... Shortwave troughing over the northern US is forecast to move eastward as sub-tropical ridging begins to build over the West. A weak cold front will move south shifting winds to northwesterly over the Rockies and northern Plains. While weaker than the preceding days, lingering flow aloft will still aid in sustaining breezy northwest winds of 15-20 mph across the Interstate 80 corridor in southwest WY. The winds overlapping with relative humidity in the 15-20 percent range amid very dry fuels will support elevated fire weather conditions across southwest WY. ...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 1142 AM CDT Sun Jun 29 2025 Valid 291700Z - 301200Z The previous forecast (see below) remains on track with no changes to Elevated highlights across southwestern Wyoming. Locally elevated fire weather conditions are possible across southern Arizona. Drought conditions and above normal fine fuel loading along with sustained west winds of 10-15 mph and relative humidity of 10-15 percent will bring a brief and localized fire weather threat to southern Arizona today. ..Williams.. 06/29/2025 .PREV DISCUSSION... /ISSUED 0204 AM CDT Sun Jun 29 2025/ ...Synopsis... Shortwave troughing over the northern US is forecast to move eastward as sub-tropical ridging begins to build over the West. A weak cold front will move south shifting winds to northwesterly over the Rockies and northern Plains. While weaker than the preceding days, lingering flow aloft will still aid in sustaining breezy northwest winds of 15-20 mph across the Interstate 80 corridor in southwest WY. The winds overlapping with relative humidity in the 15-20 percent range amid very dry fuels will support elevated fire weather conditions across southwest WY. ...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 1142 AM CDT Sun Jun 29 2025 Valid 291700Z - 301200Z The previous forecast (see below) remains on track with no changes to Elevated highlights across southwestern Wyoming. Locally elevated fire weather conditions are possible across southern Arizona. Drought conditions and above normal fine fuel loading along with sustained west winds of 10-15 mph and relative humidity of 10-15 percent will bring a brief and localized fire weather threat to southern Arizona today. ..Williams.. 06/29/2025 .PREV DISCUSSION... /ISSUED 0204 AM CDT Sun Jun 29 2025/ ...Synopsis... Shortwave troughing over the northern US is forecast to move eastward as sub-tropical ridging begins to build over the West. A weak cold front will move south shifting winds to northwesterly over the Rockies and northern Plains. While weaker than the preceding days, lingering flow aloft will still aid in sustaining breezy northwest winds of 15-20 mph across the Interstate 80 corridor in southwest WY. The winds overlapping with relative humidity in the 15-20 percent range amid very dry fuels will support elevated fire weather conditions across southwest WY. ...Please see www.spc.noaa.gov/fire for graphic product... Read more