Severe Storms

WW 0591 Status Updates
STATUS FOR WATCH 0591 HAS NOT BEEN ISSUED YET Read more

WW 0591 Status Updates
STATUS FOR WATCH 0591 HAS NOT BEEN ISSUED YET Read more

WW 591 SEVERE TSTM MN WI 152225Z - 160400Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 591 NWS Storm Prediction Center Norman OK 525 PM CDT Fri Aug 15 2025 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Southern Minnesota Western Wisconsin * Effective this Friday afternoon and evening from 525 PM until 1100 PM CDT. * Primary threats include... Scattered damaging wind gusts to 70 mph possible Scattered large hail events to 1.5 inches in diameter possible SUMMARY...Strong to severe thunderstorms will continue to develop across the region through early evening. Hail will be possible, and at least isolated damaging wind potential will exist, especially as storms merge/organize as they progress east-southeastward. The severe thunderstorm watch area is approximately along and 35 statute miles north and south of a line from 35 miles north of Redwood Falls MN to 55 miles east southeast of Eau Claire WI. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU1). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Severe Thunderstorm Watch means conditions are favorable for severe thunderstorms in and close to the watch area. Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible warnings. Severe thunderstorms can and occasionally do produce tornadoes. && OTHER WATCH INFORMATION...CONTINUE...WW 590... AVIATION...A few severe thunderstorms with hail surface and aloft to 1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 550. Mean storm motion vector 28025. ...Guyer Read more

SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0458 PM CDT Fri Aug 15 2025 Valid 171200Z - 231200Z ...Day 3/Sunday... A mid-level trough across the Pacific Northwest along with a diffuse frontal boundary along a corridor of Pacific moisture will promote a mix of wet and dry thunderstorms from northern CA into the Northern Rockies. Alignment of drier, more receptive fuels and faster northeast thunderstorm motions limiting rainfall are expected across northern NV into central ID. A 10 percent dry thunderstorm probability was maintained to cover this threat. A dry southwest flow pattern between the Pacific Northwest trough and upper-level ridge across the Southern U.S. will promote sustained south-southwest winds of up to 15 mph along with low daytime relative humidity of around 15 percent across southern NV amid very dry fuels. However, widespread critical fire weather conditions are not expected. ...Day 4/Monday - Day 8/Friday... Mid-level troughing will moderate fire weather concerns across the Northwestern U.S. early next week while the Southern U.S. mid/upper-level ridge begins to shift and strengthen into the Four Corners region. Ridging amplifies well into the Northern Rockies by Day 5/Tuesday with gradual expansion and westward propagation into the West Coast by Day 8/Friday. Above normal surface temperatures will similarly expand across most of the western U.S. by the end of next week. A return of monsoon moisture into the Intermountain West could pose a dry thunderstorm threat across the eastern Great Basin beginning on Day 6/Wednesday translating northward to include UT by Day 7/Thursday and WY by Day 8/Friday. Uncertainty in magnitude of moisture return and subsequent thunderstorm coverage precludes introducing dry thunderstorm probabilities at this time. ..Williams.. 08/15/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0458 PM CDT Fri Aug 15 2025 Valid 171200Z - 231200Z ...Day 3/Sunday... A mid-level trough across the Pacific Northwest along with a diffuse frontal boundary along a corridor of Pacific moisture will promote a mix of wet and dry thunderstorms from northern CA into the Northern Rockies. Alignment of drier, more receptive fuels and faster northeast thunderstorm motions limiting rainfall are expected across northern NV into central ID. A 10 percent dry thunderstorm probability was maintained to cover this threat. A dry southwest flow pattern between the Pacific Northwest trough and upper-level ridge across the Southern U.S. will promote sustained south-southwest winds of up to 15 mph along with low daytime relative humidity of around 15 percent across southern NV amid very dry fuels. However, widespread critical fire weather conditions are not expected. ...Day 4/Monday - Day 8/Friday... Mid-level troughing will moderate fire weather concerns across the Northwestern U.S. early next week while the Southern U.S. mid/upper-level ridge begins to shift and strengthen into the Four Corners region. Ridging amplifies well into the Northern Rockies by Day 5/Tuesday with gradual expansion and westward propagation into the West Coast by Day 8/Friday. Above normal surface temperatures will similarly expand across most of the western U.S. by the end of next week. A return of monsoon moisture into the Intermountain West could pose a dry thunderstorm threat across the eastern Great Basin beginning on Day 6/Wednesday translating northward to include UT by Day 7/Thursday and WY by Day 8/Friday. Uncertainty in magnitude of moisture return and subsequent thunderstorm coverage precludes introducing dry thunderstorm probabilities at this time. ..Williams.. 08/15/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0458 PM CDT Fri Aug 15 2025 Valid 171200Z - 231200Z ...Day 3/Sunday... A mid-level trough across the Pacific Northwest along with a diffuse frontal boundary along a corridor of Pacific moisture will promote a mix of wet and dry thunderstorms from northern CA into the Northern Rockies. Alignment of drier, more receptive fuels and faster northeast thunderstorm motions limiting rainfall are expected across northern NV into central ID. A 10 percent dry thunderstorm probability was maintained to cover this threat. A dry southwest flow pattern between the Pacific Northwest trough and upper-level ridge across the Southern U.S. will promote sustained south-southwest winds of up to 15 mph along with low daytime relative humidity of around 15 percent across southern NV amid very dry fuels. However, widespread critical fire weather conditions are not expected. ...Day 4/Monday - Day 8/Friday... Mid-level troughing will moderate fire weather concerns across the Northwestern U.S. early next week while the Southern U.S. mid/upper-level ridge begins to shift and strengthen into the Four Corners region. Ridging amplifies well into the Northern Rockies by Day 5/Tuesday with gradual expansion and westward propagation into the West Coast by Day 8/Friday. Above normal surface temperatures will similarly expand across most of the western U.S. by the end of next week. A return of monsoon moisture into the Intermountain West could pose a dry thunderstorm threat across the eastern Great Basin beginning on Day 6/Wednesday translating northward to include UT by Day 7/Thursday and WY by Day 8/Friday. Uncertainty in magnitude of moisture return and subsequent thunderstorm coverage precludes introducing dry thunderstorm probabilities at this time. ..Williams.. 08/15/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0458 PM CDT Fri Aug 15 2025 Valid 171200Z - 231200Z ...Day 3/Sunday... A mid-level trough across the Pacific Northwest along with a diffuse frontal boundary along a corridor of Pacific moisture will promote a mix of wet and dry thunderstorms from northern CA into the Northern Rockies. Alignment of drier, more receptive fuels and faster northeast thunderstorm motions limiting rainfall are expected across northern NV into central ID. A 10 percent dry thunderstorm probability was maintained to cover this threat. A dry southwest flow pattern between the Pacific Northwest trough and upper-level ridge across the Southern U.S. will promote sustained south-southwest winds of up to 15 mph along with low daytime relative humidity of around 15 percent across southern NV amid very dry fuels. However, widespread critical fire weather conditions are not expected. ...Day 4/Monday - Day 8/Friday... Mid-level troughing will moderate fire weather concerns across the Northwestern U.S. early next week while the Southern U.S. mid/upper-level ridge begins to shift and strengthen into the Four Corners region. Ridging amplifies well into the Northern Rockies by Day 5/Tuesday with gradual expansion and westward propagation into the West Coast by Day 8/Friday. Above normal surface temperatures will similarly expand across most of the western U.S. by the end of next week. A return of monsoon moisture into the Intermountain West could pose a dry thunderstorm threat across the eastern Great Basin beginning on Day 6/Wednesday translating northward to include UT by Day 7/Thursday and WY by Day 8/Friday. Uncertainty in magnitude of moisture return and subsequent thunderstorm coverage precludes introducing dry thunderstorm probabilities at this time. ..Williams.. 08/15/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0458 PM CDT Fri Aug 15 2025 Valid 171200Z - 231200Z ...Day 3/Sunday... A mid-level trough across the Pacific Northwest along with a diffuse frontal boundary along a corridor of Pacific moisture will promote a mix of wet and dry thunderstorms from northern CA into the Northern Rockies. Alignment of drier, more receptive fuels and faster northeast thunderstorm motions limiting rainfall are expected across northern NV into central ID. A 10 percent dry thunderstorm probability was maintained to cover this threat. A dry southwest flow pattern between the Pacific Northwest trough and upper-level ridge across the Southern U.S. will promote sustained south-southwest winds of up to 15 mph along with low daytime relative humidity of around 15 percent across southern NV amid very dry fuels. However, widespread critical fire weather conditions are not expected. ...Day 4/Monday - Day 8/Friday... Mid-level troughing will moderate fire weather concerns across the Northwestern U.S. early next week while the Southern U.S. mid/upper-level ridge begins to shift and strengthen into the Four Corners region. Ridging amplifies well into the Northern Rockies by Day 5/Tuesday with gradual expansion and westward propagation into the West Coast by Day 8/Friday. Above normal surface temperatures will similarly expand across most of the western U.S. by the end of next week. A return of monsoon moisture into the Intermountain West could pose a dry thunderstorm threat across the eastern Great Basin beginning on Day 6/Wednesday translating northward to include UT by Day 7/Thursday and WY by Day 8/Friday. Uncertainty in magnitude of moisture return and subsequent thunderstorm coverage precludes introducing dry thunderstorm probabilities at this time. ..Williams.. 08/15/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0458 PM CDT Fri Aug 15 2025 Valid 171200Z - 231200Z ...Day 3/Sunday... A mid-level trough across the Pacific Northwest along with a diffuse frontal boundary along a corridor of Pacific moisture will promote a mix of wet and dry thunderstorms from northern CA into the Northern Rockies. Alignment of drier, more receptive fuels and faster northeast thunderstorm motions limiting rainfall are expected across northern NV into central ID. A 10 percent dry thunderstorm probability was maintained to cover this threat. A dry southwest flow pattern between the Pacific Northwest trough and upper-level ridge across the Southern U.S. will promote sustained south-southwest winds of up to 15 mph along with low daytime relative humidity of around 15 percent across southern NV amid very dry fuels. However, widespread critical fire weather conditions are not expected. ...Day 4/Monday - Day 8/Friday... Mid-level troughing will moderate fire weather concerns across the Northwestern U.S. early next week while the Southern U.S. mid/upper-level ridge begins to shift and strengthen into the Four Corners region. Ridging amplifies well into the Northern Rockies by Day 5/Tuesday with gradual expansion and westward propagation into the West Coast by Day 8/Friday. Above normal surface temperatures will similarly expand across most of the western U.S. by the end of next week. A return of monsoon moisture into the Intermountain West could pose a dry thunderstorm threat across the eastern Great Basin beginning on Day 6/Wednesday translating northward to include UT by Day 7/Thursday and WY by Day 8/Friday. Uncertainty in magnitude of moisture return and subsequent thunderstorm coverage precludes introducing dry thunderstorm probabilities at this time. ..Williams.. 08/15/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0458 PM CDT Fri Aug 15 2025 Valid 171200Z - 231200Z ...Day 3/Sunday... A mid-level trough across the Pacific Northwest along with a diffuse frontal boundary along a corridor of Pacific moisture will promote a mix of wet and dry thunderstorms from northern CA into the Northern Rockies. Alignment of drier, more receptive fuels and faster northeast thunderstorm motions limiting rainfall are expected across northern NV into central ID. A 10 percent dry thunderstorm probability was maintained to cover this threat. A dry southwest flow pattern between the Pacific Northwest trough and upper-level ridge across the Southern U.S. will promote sustained south-southwest winds of up to 15 mph along with low daytime relative humidity of around 15 percent across southern NV amid very dry fuels. However, widespread critical fire weather conditions are not expected. ...Day 4/Monday - Day 8/Friday... Mid-level troughing will moderate fire weather concerns across the Northwestern U.S. early next week while the Southern U.S. mid/upper-level ridge begins to shift and strengthen into the Four Corners region. Ridging amplifies well into the Northern Rockies by Day 5/Tuesday with gradual expansion and westward propagation into the West Coast by Day 8/Friday. Above normal surface temperatures will similarly expand across most of the western U.S. by the end of next week. A return of monsoon moisture into the Intermountain West could pose a dry thunderstorm threat across the eastern Great Basin beginning on Day 6/Wednesday translating northward to include UT by Day 7/Thursday and WY by Day 8/Friday. Uncertainty in magnitude of moisture return and subsequent thunderstorm coverage precludes introducing dry thunderstorm probabilities at this time. ..Williams.. 08/15/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0458 PM CDT Fri Aug 15 2025 Valid 171200Z - 231200Z ...Day 3/Sunday... A mid-level trough across the Pacific Northwest along with a diffuse frontal boundary along a corridor of Pacific moisture will promote a mix of wet and dry thunderstorms from northern CA into the Northern Rockies. Alignment of drier, more receptive fuels and faster northeast thunderstorm motions limiting rainfall are expected across northern NV into central ID. A 10 percent dry thunderstorm probability was maintained to cover this threat. A dry southwest flow pattern between the Pacific Northwest trough and upper-level ridge across the Southern U.S. will promote sustained south-southwest winds of up to 15 mph along with low daytime relative humidity of around 15 percent across southern NV amid very dry fuels. However, widespread critical fire weather conditions are not expected. ...Day 4/Monday - Day 8/Friday... Mid-level troughing will moderate fire weather concerns across the Northwestern U.S. early next week while the Southern U.S. mid/upper-level ridge begins to shift and strengthen into the Four Corners region. Ridging amplifies well into the Northern Rockies by Day 5/Tuesday with gradual expansion and westward propagation into the West Coast by Day 8/Friday. Above normal surface temperatures will similarly expand across most of the western U.S. by the end of next week. A return of monsoon moisture into the Intermountain West could pose a dry thunderstorm threat across the eastern Great Basin beginning on Day 6/Wednesday translating northward to include UT by Day 7/Thursday and WY by Day 8/Friday. Uncertainty in magnitude of moisture return and subsequent thunderstorm coverage precludes introducing dry thunderstorm probabilities at this time. ..Williams.. 08/15/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0458 PM CDT Fri Aug 15 2025 Valid 171200Z - 231200Z ...Day 3/Sunday... A mid-level trough across the Pacific Northwest along with a diffuse frontal boundary along a corridor of Pacific moisture will promote a mix of wet and dry thunderstorms from northern CA into the Northern Rockies. Alignment of drier, more receptive fuels and faster northeast thunderstorm motions limiting rainfall are expected across northern NV into central ID. A 10 percent dry thunderstorm probability was maintained to cover this threat. A dry southwest flow pattern between the Pacific Northwest trough and upper-level ridge across the Southern U.S. will promote sustained south-southwest winds of up to 15 mph along with low daytime relative humidity of around 15 percent across southern NV amid very dry fuels. However, widespread critical fire weather conditions are not expected. ...Day 4/Monday - Day 8/Friday... Mid-level troughing will moderate fire weather concerns across the Northwestern U.S. early next week while the Southern U.S. mid/upper-level ridge begins to shift and strengthen into the Four Corners region. Ridging amplifies well into the Northern Rockies by Day 5/Tuesday with gradual expansion and westward propagation into the West Coast by Day 8/Friday. Above normal surface temperatures will similarly expand across most of the western U.S. by the end of next week. A return of monsoon moisture into the Intermountain West could pose a dry thunderstorm threat across the eastern Great Basin beginning on Day 6/Wednesday translating northward to include UT by Day 7/Thursday and WY by Day 8/Friday. Uncertainty in magnitude of moisture return and subsequent thunderstorm coverage precludes introducing dry thunderstorm probabilities at this time. ..Williams.. 08/15/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0458 PM CDT Fri Aug 15 2025 Valid 171200Z - 231200Z ...Day 3/Sunday... A mid-level trough across the Pacific Northwest along with a diffuse frontal boundary along a corridor of Pacific moisture will promote a mix of wet and dry thunderstorms from northern CA into the Northern Rockies. Alignment of drier, more receptive fuels and faster northeast thunderstorm motions limiting rainfall are expected across northern NV into central ID. A 10 percent dry thunderstorm probability was maintained to cover this threat. A dry southwest flow pattern between the Pacific Northwest trough and upper-level ridge across the Southern U.S. will promote sustained south-southwest winds of up to 15 mph along with low daytime relative humidity of around 15 percent across southern NV amid very dry fuels. However, widespread critical fire weather conditions are not expected. ...Day 4/Monday - Day 8/Friday... Mid-level troughing will moderate fire weather concerns across the Northwestern U.S. early next week while the Southern U.S. mid/upper-level ridge begins to shift and strengthen into the Four Corners region. Ridging amplifies well into the Northern Rockies by Day 5/Tuesday with gradual expansion and westward propagation into the West Coast by Day 8/Friday. Above normal surface temperatures will similarly expand across most of the western U.S. by the end of next week. A return of monsoon moisture into the Intermountain West could pose a dry thunderstorm threat across the eastern Great Basin beginning on Day 6/Wednesday translating northward to include UT by Day 7/Thursday and WY by Day 8/Friday. Uncertainty in magnitude of moisture return and subsequent thunderstorm coverage precludes introducing dry thunderstorm probabilities at this time. ..Williams.. 08/15/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0458 PM CDT Fri Aug 15 2025 Valid 171200Z - 231200Z ...Day 3/Sunday... A mid-level trough across the Pacific Northwest along with a diffuse frontal boundary along a corridor of Pacific moisture will promote a mix of wet and dry thunderstorms from northern CA into the Northern Rockies. Alignment of drier, more receptive fuels and faster northeast thunderstorm motions limiting rainfall are expected across northern NV into central ID. A 10 percent dry thunderstorm probability was maintained to cover this threat. A dry southwest flow pattern between the Pacific Northwest trough and upper-level ridge across the Southern U.S. will promote sustained south-southwest winds of up to 15 mph along with low daytime relative humidity of around 15 percent across southern NV amid very dry fuels. However, widespread critical fire weather conditions are not expected. ...Day 4/Monday - Day 8/Friday... Mid-level troughing will moderate fire weather concerns across the Northwestern U.S. early next week while the Southern U.S. mid/upper-level ridge begins to shift and strengthen into the Four Corners region. Ridging amplifies well into the Northern Rockies by Day 5/Tuesday with gradual expansion and westward propagation into the West Coast by Day 8/Friday. Above normal surface temperatures will similarly expand across most of the western U.S. by the end of next week. A return of monsoon moisture into the Intermountain West could pose a dry thunderstorm threat across the eastern Great Basin beginning on Day 6/Wednesday translating northward to include UT by Day 7/Thursday and WY by Day 8/Friday. Uncertainty in magnitude of moisture return and subsequent thunderstorm coverage precludes introducing dry thunderstorm probabilities at this time. ..Williams.. 08/15/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0458 PM CDT Fri Aug 15 2025 Valid 171200Z - 231200Z ...Day 3/Sunday... A mid-level trough across the Pacific Northwest along with a diffuse frontal boundary along a corridor of Pacific moisture will promote a mix of wet and dry thunderstorms from northern CA into the Northern Rockies. Alignment of drier, more receptive fuels and faster northeast thunderstorm motions limiting rainfall are expected across northern NV into central ID. A 10 percent dry thunderstorm probability was maintained to cover this threat. A dry southwest flow pattern between the Pacific Northwest trough and upper-level ridge across the Southern U.S. will promote sustained south-southwest winds of up to 15 mph along with low daytime relative humidity of around 15 percent across southern NV amid very dry fuels. However, widespread critical fire weather conditions are not expected. ...Day 4/Monday - Day 8/Friday... Mid-level troughing will moderate fire weather concerns across the Northwestern U.S. early next week while the Southern U.S. mid/upper-level ridge begins to shift and strengthen into the Four Corners region. Ridging amplifies well into the Northern Rockies by Day 5/Tuesday with gradual expansion and westward propagation into the West Coast by Day 8/Friday. Above normal surface temperatures will similarly expand across most of the western U.S. by the end of next week. A return of monsoon moisture into the Intermountain West could pose a dry thunderstorm threat across the eastern Great Basin beginning on Day 6/Wednesday translating northward to include UT by Day 7/Thursday and WY by Day 8/Friday. Uncertainty in magnitude of moisture return and subsequent thunderstorm coverage precludes introducing dry thunderstorm probabilities at this time. ..Williams.. 08/15/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0458 PM CDT Fri Aug 15 2025 Valid 171200Z - 231200Z ...Day 3/Sunday... A mid-level trough across the Pacific Northwest along with a diffuse frontal boundary along a corridor of Pacific moisture will promote a mix of wet and dry thunderstorms from northern CA into the Northern Rockies. Alignment of drier, more receptive fuels and faster northeast thunderstorm motions limiting rainfall are expected across northern NV into central ID. A 10 percent dry thunderstorm probability was maintained to cover this threat. A dry southwest flow pattern between the Pacific Northwest trough and upper-level ridge across the Southern U.S. will promote sustained south-southwest winds of up to 15 mph along with low daytime relative humidity of around 15 percent across southern NV amid very dry fuels. However, widespread critical fire weather conditions are not expected. ...Day 4/Monday - Day 8/Friday... Mid-level troughing will moderate fire weather concerns across the Northwestern U.S. early next week while the Southern U.S. mid/upper-level ridge begins to shift and strengthen into the Four Corners region. Ridging amplifies well into the Northern Rockies by Day 5/Tuesday with gradual expansion and westward propagation into the West Coast by Day 8/Friday. Above normal surface temperatures will similarly expand across most of the western U.S. by the end of next week. A return of monsoon moisture into the Intermountain West could pose a dry thunderstorm threat across the eastern Great Basin beginning on Day 6/Wednesday translating northward to include UT by Day 7/Thursday and WY by Day 8/Friday. Uncertainty in magnitude of moisture return and subsequent thunderstorm coverage precludes introducing dry thunderstorm probabilities at this time. ..Williams.. 08/15/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0458 PM CDT Fri Aug 15 2025 Valid 171200Z - 231200Z ...Day 3/Sunday... A mid-level trough across the Pacific Northwest along with a diffuse frontal boundary along a corridor of Pacific moisture will promote a mix of wet and dry thunderstorms from northern CA into the Northern Rockies. Alignment of drier, more receptive fuels and faster northeast thunderstorm motions limiting rainfall are expected across northern NV into central ID. A 10 percent dry thunderstorm probability was maintained to cover this threat. A dry southwest flow pattern between the Pacific Northwest trough and upper-level ridge across the Southern U.S. will promote sustained south-southwest winds of up to 15 mph along with low daytime relative humidity of around 15 percent across southern NV amid very dry fuels. However, widespread critical fire weather conditions are not expected. ...Day 4/Monday - Day 8/Friday... Mid-level troughing will moderate fire weather concerns across the Northwestern U.S. early next week while the Southern U.S. mid/upper-level ridge begins to shift and strengthen into the Four Corners region. Ridging amplifies well into the Northern Rockies by Day 5/Tuesday with gradual expansion and westward propagation into the West Coast by Day 8/Friday. Above normal surface temperatures will similarly expand across most of the western U.S. by the end of next week. A return of monsoon moisture into the Intermountain West could pose a dry thunderstorm threat across the eastern Great Basin beginning on Day 6/Wednesday translating northward to include UT by Day 7/Thursday and WY by Day 8/Friday. Uncertainty in magnitude of moisture return and subsequent thunderstorm coverage precludes introducing dry thunderstorm probabilities at this time. ..Williams.. 08/15/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0458 PM CDT Fri Aug 15 2025 Valid 171200Z - 231200Z ...Day 3/Sunday... A mid-level trough across the Pacific Northwest along with a diffuse frontal boundary along a corridor of Pacific moisture will promote a mix of wet and dry thunderstorms from northern CA into the Northern Rockies. Alignment of drier, more receptive fuels and faster northeast thunderstorm motions limiting rainfall are expected across northern NV into central ID. A 10 percent dry thunderstorm probability was maintained to cover this threat. A dry southwest flow pattern between the Pacific Northwest trough and upper-level ridge across the Southern U.S. will promote sustained south-southwest winds of up to 15 mph along with low daytime relative humidity of around 15 percent across southern NV amid very dry fuels. However, widespread critical fire weather conditions are not expected. ...Day 4/Monday - Day 8/Friday... Mid-level troughing will moderate fire weather concerns across the Northwestern U.S. early next week while the Southern U.S. mid/upper-level ridge begins to shift and strengthen into the Four Corners region. Ridging amplifies well into the Northern Rockies by Day 5/Tuesday with gradual expansion and westward propagation into the West Coast by Day 8/Friday. Above normal surface temperatures will similarly expand across most of the western U.S. by the end of next week. A return of monsoon moisture into the Intermountain West could pose a dry thunderstorm threat across the eastern Great Basin beginning on Day 6/Wednesday translating northward to include UT by Day 7/Thursday and WY by Day 8/Friday. Uncertainty in magnitude of moisture return and subsequent thunderstorm coverage precludes introducing dry thunderstorm probabilities at this time. ..Williams.. 08/15/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0458 PM CDT Fri Aug 15 2025 Valid 171200Z - 231200Z ...Day 3/Sunday... A mid-level trough across the Pacific Northwest along with a diffuse frontal boundary along a corridor of Pacific moisture will promote a mix of wet and dry thunderstorms from northern CA into the Northern Rockies. Alignment of drier, more receptive fuels and faster northeast thunderstorm motions limiting rainfall are expected across northern NV into central ID. A 10 percent dry thunderstorm probability was maintained to cover this threat. A dry southwest flow pattern between the Pacific Northwest trough and upper-level ridge across the Southern U.S. will promote sustained south-southwest winds of up to 15 mph along with low daytime relative humidity of around 15 percent across southern NV amid very dry fuels. However, widespread critical fire weather conditions are not expected. ...Day 4/Monday - Day 8/Friday... Mid-level troughing will moderate fire weather concerns across the Northwestern U.S. early next week while the Southern U.S. mid/upper-level ridge begins to shift and strengthen into the Four Corners region. Ridging amplifies well into the Northern Rockies by Day 5/Tuesday with gradual expansion and westward propagation into the West Coast by Day 8/Friday. Above normal surface temperatures will similarly expand across most of the western U.S. by the end of next week. A return of monsoon moisture into the Intermountain West could pose a dry thunderstorm threat across the eastern Great Basin beginning on Day 6/Wednesday translating northward to include UT by Day 7/Thursday and WY by Day 8/Friday. Uncertainty in magnitude of moisture return and subsequent thunderstorm coverage precludes introducing dry thunderstorm probabilities at this time. ..Williams.. 08/15/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

MD 1953 CONCERNING SEVERE THUNDERSTORM WATCH 589...590... FOR CENTRAL/EASTERN IA AND ADJACENT WI/IL
Mesoscale Discussion 1953 NWS Storm Prediction Center Norman OK 0332 PM CDT Fri Aug 15 2025 Areas affected...central/eastern IA and adjacent WI/IL Concerning...Severe Thunderstorm Watch 589...590... Valid 152032Z - 152200Z The severe weather threat for Severe Thunderstorm Watch 589, 590 continues. SUMMARY...Sporadic severe wind/hail will remain possible through early evening as a linear cluster moves east-southeast from north-central Iowa. DISCUSSION...A short and generally west-southwest/east-northeast oriented linear cluster has been progressing east-southeast at around 35-40 kts. The temperature gradient between the cold pool and the ambient warm-moist sector downstream has increased to 15-20 F. Strong/near-severe gusts producing localized tree damage along with marginally severe hail have been recently reported, and should continue for at least a few more hours, especially on the eastward-propagating portion of the cluster. Outflow is largely ahead of the trailing westward portion, but not strongly surging, so there is possibility for a bowing segment to surge southeastward. Ongoing Severe Thunderstorm Watches appear to well handle the overall threat, but some refinement could be needed based on convective trends over the next 1-2 hours. ..Grams.. 08/15/2025 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...LOT...MKX...DVN...ARX...DMX... LAT...LON 43189253 43299205 43349145 43289093 42919027 42468979 42058958 41668985 41599037 41469079 41659263 41779373 42209405 42449404 42579312 42659281 43189253 MOST PROBABLE PEAK WIND GUST...55-70 MPH MOST PROBABLE PEAK HAIL SIZE...1.00-1.75 IN Read more