Severe Storms

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

WW 0590 Status Updates
STATUS REPORT ON WW 590 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 NNW ALO TO 40 SE RST. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1953. ..GRAMS..08/15/25 ATTN...WFO...ARX...DVN... STATUS REPORT FOR WS 590 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS ILC015-073-085-131-161-195-152140- IL . ILLINOIS COUNTIES INCLUDED ARE CARROLL HENRY JO DAVIESS MERCER ROCK ISLAND WHITESIDE IAC005-011-019-031-037-043-045-055-061-065-095-097-103-105-107- 113-115-139-163-183-191-152140- IA . IOWA COUNTIES INCLUDED ARE ALLAMAKEE BENTON BUCHANAN CEDAR CHICKASAW CLAYTON CLINTON DELAWARE DUBUQUE FAYETTE IOWA JACKSON JOHNSON JONES KEOKUK LINN LOUISA MUSCATINE SCOTT WASHINGTON WINNESHIEK Read more

WW 0590 Status Updates
STATUS REPORT ON WW 590 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 NNW ALO TO 40 SE RST. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1953. ..GRAMS..08/15/25 ATTN...WFO...ARX...DVN... STATUS REPORT FOR WS 590 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS ILC015-073-085-131-161-195-152140- IL . ILLINOIS COUNTIES INCLUDED ARE CARROLL HENRY JO DAVIESS MERCER ROCK ISLAND WHITESIDE IAC005-011-019-031-037-043-045-055-061-065-095-097-103-105-107- 113-115-139-163-183-191-152140- IA . IOWA COUNTIES INCLUDED ARE ALLAMAKEE BENTON BUCHANAN CEDAR CHICKASAW CLAYTON CLINTON DELAWARE DUBUQUE FAYETTE IOWA JACKSON JOHNSON JONES KEOKUK LINN LOUISA MUSCATINE SCOTT WASHINGTON WINNESHIEK Read more

WW 0590 Status Updates
STATUS REPORT ON WW 590 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 NNW ALO TO 40 SE RST. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1953. ..GRAMS..08/15/25 ATTN...WFO...ARX...DVN... STATUS REPORT FOR WS 590 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS ILC015-073-085-131-161-195-152140- IL . ILLINOIS COUNTIES INCLUDED ARE CARROLL HENRY JO DAVIESS MERCER ROCK ISLAND WHITESIDE IAC005-011-019-031-037-043-045-055-061-065-095-097-103-105-107- 113-115-139-163-183-191-152140- IA . IOWA COUNTIES INCLUDED ARE ALLAMAKEE BENTON BUCHANAN CEDAR CHICKASAW CLAYTON CLINTON DELAWARE DUBUQUE FAYETTE IOWA JACKSON JOHNSON JONES KEOKUK LINN LOUISA MUSCATINE SCOTT WASHINGTON WINNESHIEK Read more

WW 0590 Status Updates
STATUS REPORT ON WW 590 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 NNW ALO TO 40 SE RST. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1953. ..GRAMS..08/15/25 ATTN...WFO...ARX...DVN... STATUS REPORT FOR WS 590 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS ILC015-073-085-131-161-195-152140- IL . ILLINOIS COUNTIES INCLUDED ARE CARROLL HENRY JO DAVIESS MERCER ROCK ISLAND WHITESIDE IAC005-011-019-031-037-043-045-055-061-065-095-097-103-105-107- 113-115-139-163-183-191-152140- IA . IOWA COUNTIES INCLUDED ARE ALLAMAKEE BENTON BUCHANAN CEDAR CHICKASAW CLAYTON CLINTON DELAWARE DUBUQUE FAYETTE IOWA JACKSON JOHNSON JONES KEOKUK LINN LOUISA MUSCATINE SCOTT WASHINGTON WINNESHIEK Read more

WW 590 SEVERE TSTM IA IL WI 151915Z - 160000Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 590 NWS Storm Prediction Center Norman OK 215 PM CDT Fri Aug 15 2025 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Eastern Iowa Far Northwest Illinois Extreme Southwest Wisconsin * Effective this Friday afternoon and evening from 215 PM until 700 PM CDT. * Primary threats include... Scattered damaging wind gusts to 70 mph possible Isolated large hail events to 1.5 inches in diameter possible SUMMARY...Convective line currently moving through north-central IA is forecast to continue eastward into eastern IA and adjacent extreme southwest WI and far northwest IL. The airmass in these areas is moist, unstable, and supportive of both isolated large hail and scattered damaging gusts. The severe thunderstorm watch area is approximately along and 55 statute miles east and west of a line from 70 miles north northeast of Waterloo IA to 25 miles west southwest of Moline IL. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU0). 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 589... 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 500. Mean storm motion vector 28035. ...Mosier Read more

WW 0589 Status Updates
STATUS REPORT ON WW 589 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 15 E SLB TO 25 SE MCW. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1953. ..GRAMS..08/15/25 ATTN...WFO...DMX... STATUS REPORT FOR WS 589 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS IAC013-015-017-023-025-027-069-073-075-079-083-127-161-169-171- 187-152140- IA . IOWA COUNTIES INCLUDED ARE BLACK HAWK BOONE BREMER BUTLER CALHOUN CARROLL FRANKLIN GREENE GRUNDY HAMILTON HARDIN MARSHALL SAC STORY TAMA WEBSTER THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES. Read more

WW 0589 Status Updates
STATUS REPORT ON WW 589 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 15 E SLB TO 25 SE MCW. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1953. ..GRAMS..08/15/25 ATTN...WFO...DMX... STATUS REPORT FOR WS 589 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS IAC013-015-017-023-025-027-069-073-075-079-083-127-161-169-171- 187-152140- IA . IOWA COUNTIES INCLUDED ARE BLACK HAWK BOONE BREMER BUTLER CALHOUN CARROLL FRANKLIN GREENE GRUNDY HAMILTON HARDIN MARSHALL SAC STORY TAMA WEBSTER THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES. Read more

WW 0589 Status Updates
STATUS REPORT ON WW 589 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 15 E SLB TO 25 SE MCW. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1953. ..GRAMS..08/15/25 ATTN...WFO...DMX... STATUS REPORT FOR WS 589 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS IAC013-015-017-023-025-027-069-073-075-079-083-127-161-169-171- 187-152140- IA . IOWA COUNTIES INCLUDED ARE BLACK HAWK BOONE BREMER BUTLER CALHOUN CARROLL FRANKLIN GREENE GRUNDY HAMILTON HARDIN MARSHALL SAC STORY TAMA WEBSTER THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES. Read more

WW 0589 Status Updates
STATUS REPORT ON WW 589 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 15 E SLB TO 25 SE MCW. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1953. ..GRAMS..08/15/25 ATTN...WFO...DMX... STATUS REPORT FOR WS 589 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS IAC013-015-017-023-025-027-069-073-075-079-083-127-161-169-171- 187-152140- IA . IOWA COUNTIES INCLUDED ARE BLACK HAWK BOONE BREMER BUTLER CALHOUN CARROLL FRANKLIN GREENE GRUNDY HAMILTON HARDIN MARSHALL SAC STORY TAMA WEBSTER THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES. Read more