Severe Storms

SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 1235 AM CDT Fri Aug 30 2024 Valid 301200Z - 311200Z ...NO CRITICAL AREAS... ...Synopsis... Fire weather concerns are expected to remain limited for today across the country. Dry conditions will persist across much of the Great Basin and into parts of the Pacific Northwest and central Rockies for this afternoon with RH minimums once again falling into the teens and single digits. Upper-level ridging over the western CONUS will promote mostly clear skies but weak synoptic/gradient winds that should mitigate fire weather concerns. Thunderstorm activity along the lower CO River Valley on Thursday (yesterday) resulted in a mix of wet and dry thunderstorms based on sporadic rainfall measurements and MRMS QPE. A similar mix of wet/dry thunderstorms is expected again today across far southeast NV into western AZ as weak mid-level ascent overspreads the fringe of a modest monsoonal moisture plume. Latest fuel guidance suggests lightning ignition efficiency/fuel dryness gradually increases from far western AZ into southern NV, but the spatial coverage of sufficiently dry fuel with appreciable dry lightning threat appears too limited to introduce highlights. ..Moore.. 08/30/2024 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

WW 0664 Status Updates
STATUS REPORT ON WW 664 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 55 S LSE TO 20 N VOK. REMAINING VALID PORTION OF WW 664 MAY BE ALLOWED TO EXPIRE AT 30/04Z. ..KERR..08/30/24 ATTN...WFO...ARX... STATUS REPORT FOR WS 664 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS WIC023-057-081-103-123-300400- WI . WISCONSIN COUNTIES INCLUDED ARE CRAWFORD JUNEAU MONROE RICHLAND VERNON 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 664 SEVERE TSTM IA MN WI 300050Z - 300400Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 664 NWS Storm Prediction Center Norman OK 750 PM CDT Thu Aug 29 2024 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Extreme northeast Iowa Extreme southeast Minnesota Southwest and west central Wisconsin * Effective this Thursday evening from 750 PM until 1100 PM CDT. * Primary threats include... Scattered damaging wind gusts to 70 mph possible Isolated large hail events to 1 inch in diameter possible A tornado or two possible SUMMARY...A line of storms with a history of wind damage will continue eastward for the next few hours before weakening. An isolated tornado or two, as well as marginally severe hail, will also be possible with the more intense/embedded segments. The severe thunderstorm watch area is approximately along and 25 statute miles east and west of a line from 105 miles north northeast of La Crosse WI to 55 miles south of La Crosse WI. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU4). 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 662...WW 663... AVIATION...A few severe thunderstorms with hail surface and aloft to 1 inch. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 26030. ...Thompson Read more

WW 0664 Status Updates
STATUS REPORT ON WW 664 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 15 WSW LSE TO 30 NNW AUW. ..KERR..08/30/24 ATTN...WFO...ARX... STATUS REPORT FOR WS 664 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS IAC005-191-300340- IA . IOWA COUNTIES INCLUDED ARE ALLAMAKEE WINNESHIEK MNC055-300340- MN . MINNESOTA COUNTIES INCLUDED ARE HOUSTON WIC019-023-053-057-063-081-103-123-300340- WI . WISCONSIN COUNTIES INCLUDED ARE CLARK CRAWFORD JACKSON JUNEAU LA CROSSE MONROE RICHLAND VERNON Read more

WW 0662 Status Updates
STATUS REPORT ON WW 662 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 25 WNW MCW TO 35 N MCW. REMAINING VALID PORTION OF WW 662 MAY BE ALLOWED TO EXPIRE AT 30/02Z. ..KERR..08/30/24 ATTN...WFO...FSD...DLH...MPX...FGF... STATUS REPORT FOR WS 662 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS WIC107-300200- WI . WISCONSIN COUNTIES INCLUDED ARE RUSK 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 0662 Status Updates
STATUS REPORT ON WW 662 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 25 WNW MCW TO 35 N MCW. REMAINING VALID PORTION OF WW 662 MAY BE ALLOWED TO EXPIRE AT 30/02Z. ..KERR..08/30/24 ATTN...WFO...FSD...DLH...MPX...FGF... STATUS REPORT FOR WS 662 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS WIC107-300200- WI . WISCONSIN COUNTIES INCLUDED ARE RUSK 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 0662 Status Updates
STATUS REPORT ON WW 662 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 25 WNW MCW TO 35 N MCW. REMAINING VALID PORTION OF WW 662 MAY BE ALLOWED TO EXPIRE AT 30/02Z. ..KERR..08/30/24 ATTN...WFO...FSD...DLH...MPX...FGF... STATUS REPORT FOR WS 662 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS WIC107-300200- WI . WISCONSIN COUNTIES INCLUDED ARE RUSK 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 662 SEVERE TSTM IA MN WI LS 291935Z - 300200Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 662 NWS Storm Prediction Center Norman OK 235 PM CDT Thu Aug 29 2024 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Northwest Iowa Minnesota Western and Northwest Wisconsin Lake Superior * Effective this Thursday afternoon and evening from 235 PM until 900 PM CDT. * Primary threats include... Scattered damaging wind gusts to 70 mph likely Scattered large hail and isolated very large hail events to 2 inches in diameter possible A tornado or two possible SUMMARY...Storms will continue to intensify and move east-northeastward across the region through late afternoon and early evening. Damaging winds and isolated large hail are expected to be the most common hazards, although some tornado threat may also exist near a warm front. The severe thunderstorm watch area is approximately along and 65 statute miles east and west of a line from 45 miles northwest of Ely MN to 35 miles southwest of Fairmont MN. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU2). 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. && AVIATION...A few severe thunderstorms with hail surface and aloft to 2 inches. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 550. Mean storm motion vector 24030. ...Guyer Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0747 PM CDT Thu Aug 29 2024 Valid 300100Z - 301200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE UPPER MIDWEST... ...SUMMARY... Thunderstorms, a few severe, will spread across the Upper Midwest this evening. Some risk for isolated wind/hail persists through about 04-05z. ...01z Update... Strong, well-defined upper low is lifting northeast across southern MB early this evening. Trailing trough extends across the eastern Dakotas with the southern most portion affecting western KS. This feature is largely responsible for an elongated band of convection across the Upper Midwest, arcing ahead of a synoptic front into the central Plains. The most organized portion of this linear MCS is advancing across western WI/southeast MN/IA. LLJ will shift east across IA/WI this evening, suggesting this activity will remain organized for several hours. Most supercell structures have been disorganized along the line, and damaging winds will likely be the primary severe threat, as large hail has been mostly absent with this convection. Scattered-numerous thunderstorm clusters persist across the Middle Atlantic region this evening. 00z soundings from this region exhibit modest lapse rates, but seasonally high PW values. Wind profiles are marginally supportive of organized updrafts so this activity has likely peaked in intensity. Aside from an isolated damaging wind/hail report, the overall severe threat should gradually diminish over the next few hours. ..Darrow.. 08/30/2024 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0747 PM CDT Thu Aug 29 2024 Valid 300100Z - 301200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE UPPER MIDWEST... ...SUMMARY... Thunderstorms, a few severe, will spread across the Upper Midwest this evening. Some risk for isolated wind/hail persists through about 04-05z. ...01z Update... Strong, well-defined upper low is lifting northeast across southern MB early this evening. Trailing trough extends across the eastern Dakotas with the southern most portion affecting western KS. This feature is largely responsible for an elongated band of convection across the Upper Midwest, arcing ahead of a synoptic front into the central Plains. The most organized portion of this linear MCS is advancing across western WI/southeast MN/IA. LLJ will shift east across IA/WI this evening, suggesting this activity will remain organized for several hours. Most supercell structures have been disorganized along the line, and damaging winds will likely be the primary severe threat, as large hail has been mostly absent with this convection. Scattered-numerous thunderstorm clusters persist across the Middle Atlantic region this evening. 00z soundings from this region exhibit modest lapse rates, but seasonally high PW values. Wind profiles are marginally supportive of organized updrafts so this activity has likely peaked in intensity. Aside from an isolated damaging wind/hail report, the overall severe threat should gradually diminish over the next few hours. ..Darrow.. 08/30/2024 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0747 PM CDT Thu Aug 29 2024 Valid 300100Z - 301200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE UPPER MIDWEST... ...SUMMARY... Thunderstorms, a few severe, will spread across the Upper Midwest this evening. Some risk for isolated wind/hail persists through about 04-05z. ...01z Update... Strong, well-defined upper low is lifting northeast across southern MB early this evening. Trailing trough extends across the eastern Dakotas with the southern most portion affecting western KS. This feature is largely responsible for an elongated band of convection across the Upper Midwest, arcing ahead of a synoptic front into the central Plains. The most organized portion of this linear MCS is advancing across western WI/southeast MN/IA. LLJ will shift east across IA/WI this evening, suggesting this activity will remain organized for several hours. Most supercell structures have been disorganized along the line, and damaging winds will likely be the primary severe threat, as large hail has been mostly absent with this convection. Scattered-numerous thunderstorm clusters persist across the Middle Atlantic region this evening. 00z soundings from this region exhibit modest lapse rates, but seasonally high PW values. Wind profiles are marginally supportive of organized updrafts so this activity has likely peaked in intensity. Aside from an isolated damaging wind/hail report, the overall severe threat should gradually diminish over the next few hours. ..Darrow.. 08/30/2024 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0747 PM CDT Thu Aug 29 2024 Valid 300100Z - 301200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE UPPER MIDWEST... ...SUMMARY... Thunderstorms, a few severe, will spread across the Upper Midwest this evening. Some risk for isolated wind/hail persists through about 04-05z. ...01z Update... Strong, well-defined upper low is lifting northeast across southern MB early this evening. Trailing trough extends across the eastern Dakotas with the southern most portion affecting western KS. This feature is largely responsible for an elongated band of convection across the Upper Midwest, arcing ahead of a synoptic front into the central Plains. The most organized portion of this linear MCS is advancing across western WI/southeast MN/IA. LLJ will shift east across IA/WI this evening, suggesting this activity will remain organized for several hours. Most supercell structures have been disorganized along the line, and damaging winds will likely be the primary severe threat, as large hail has been mostly absent with this convection. Scattered-numerous thunderstorm clusters persist across the Middle Atlantic region this evening. 00z soundings from this region exhibit modest lapse rates, but seasonally high PW values. Wind profiles are marginally supportive of organized updrafts so this activity has likely peaked in intensity. Aside from an isolated damaging wind/hail report, the overall severe threat should gradually diminish over the next few hours. ..Darrow.. 08/30/2024 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0747 PM CDT Thu Aug 29 2024 Valid 300100Z - 301200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE UPPER MIDWEST... ...SUMMARY... Thunderstorms, a few severe, will spread across the Upper Midwest this evening. Some risk for isolated wind/hail persists through about 04-05z. ...01z Update... Strong, well-defined upper low is lifting northeast across southern MB early this evening. Trailing trough extends across the eastern Dakotas with the southern most portion affecting western KS. This feature is largely responsible for an elongated band of convection across the Upper Midwest, arcing ahead of a synoptic front into the central Plains. The most organized portion of this linear MCS is advancing across western WI/southeast MN/IA. LLJ will shift east across IA/WI this evening, suggesting this activity will remain organized for several hours. Most supercell structures have been disorganized along the line, and damaging winds will likely be the primary severe threat, as large hail has been mostly absent with this convection. Scattered-numerous thunderstorm clusters persist across the Middle Atlantic region this evening. 00z soundings from this region exhibit modest lapse rates, but seasonally high PW values. Wind profiles are marginally supportive of organized updrafts so this activity has likely peaked in intensity. Aside from an isolated damaging wind/hail report, the overall severe threat should gradually diminish over the next few hours. ..Darrow.. 08/30/2024 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0747 PM CDT Thu Aug 29 2024 Valid 300100Z - 301200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE UPPER MIDWEST... ...SUMMARY... Thunderstorms, a few severe, will spread across the Upper Midwest this evening. Some risk for isolated wind/hail persists through about 04-05z. ...01z Update... Strong, well-defined upper low is lifting northeast across southern MB early this evening. Trailing trough extends across the eastern Dakotas with the southern most portion affecting western KS. This feature is largely responsible for an elongated band of convection across the Upper Midwest, arcing ahead of a synoptic front into the central Plains. The most organized portion of this linear MCS is advancing across western WI/southeast MN/IA. LLJ will shift east across IA/WI this evening, suggesting this activity will remain organized for several hours. Most supercell structures have been disorganized along the line, and damaging winds will likely be the primary severe threat, as large hail has been mostly absent with this convection. Scattered-numerous thunderstorm clusters persist across the Middle Atlantic region this evening. 00z soundings from this region exhibit modest lapse rates, but seasonally high PW values. Wind profiles are marginally supportive of organized updrafts so this activity has likely peaked in intensity. Aside from an isolated damaging wind/hail report, the overall severe threat should gradually diminish over the next few hours. ..Darrow.. 08/30/2024 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0747 PM CDT Thu Aug 29 2024 Valid 300100Z - 301200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE UPPER MIDWEST... ...SUMMARY... Thunderstorms, a few severe, will spread across the Upper Midwest this evening. Some risk for isolated wind/hail persists through about 04-05z. ...01z Update... Strong, well-defined upper low is lifting northeast across southern MB early this evening. Trailing trough extends across the eastern Dakotas with the southern most portion affecting western KS. This feature is largely responsible for an elongated band of convection across the Upper Midwest, arcing ahead of a synoptic front into the central Plains. The most organized portion of this linear MCS is advancing across western WI/southeast MN/IA. LLJ will shift east across IA/WI this evening, suggesting this activity will remain organized for several hours. Most supercell structures have been disorganized along the line, and damaging winds will likely be the primary severe threat, as large hail has been mostly absent with this convection. Scattered-numerous thunderstorm clusters persist across the Middle Atlantic region this evening. 00z soundings from this region exhibit modest lapse rates, but seasonally high PW values. Wind profiles are marginally supportive of organized updrafts so this activity has likely peaked in intensity. Aside from an isolated damaging wind/hail report, the overall severe threat should gradually diminish over the next few hours. ..Darrow.. 08/30/2024 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0747 PM CDT Thu Aug 29 2024 Valid 300100Z - 301200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE UPPER MIDWEST... ...SUMMARY... Thunderstorms, a few severe, will spread across the Upper Midwest this evening. Some risk for isolated wind/hail persists through about 04-05z. ...01z Update... Strong, well-defined upper low is lifting northeast across southern MB early this evening. Trailing trough extends across the eastern Dakotas with the southern most portion affecting western KS. This feature is largely responsible for an elongated band of convection across the Upper Midwest, arcing ahead of a synoptic front into the central Plains. The most organized portion of this linear MCS is advancing across western WI/southeast MN/IA. LLJ will shift east across IA/WI this evening, suggesting this activity will remain organized for several hours. Most supercell structures have been disorganized along the line, and damaging winds will likely be the primary severe threat, as large hail has been mostly absent with this convection. Scattered-numerous thunderstorm clusters persist across the Middle Atlantic region this evening. 00z soundings from this region exhibit modest lapse rates, but seasonally high PW values. Wind profiles are marginally supportive of organized updrafts so this activity has likely peaked in intensity. Aside from an isolated damaging wind/hail report, the overall severe threat should gradually diminish over the next few hours. ..Darrow.. 08/30/2024 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0747 PM CDT Thu Aug 29 2024 Valid 300100Z - 301200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE UPPER MIDWEST... ...SUMMARY... Thunderstorms, a few severe, will spread across the Upper Midwest this evening. Some risk for isolated wind/hail persists through about 04-05z. ...01z Update... Strong, well-defined upper low is lifting northeast across southern MB early this evening. Trailing trough extends across the eastern Dakotas with the southern most portion affecting western KS. This feature is largely responsible for an elongated band of convection across the Upper Midwest, arcing ahead of a synoptic front into the central Plains. The most organized portion of this linear MCS is advancing across western WI/southeast MN/IA. LLJ will shift east across IA/WI this evening, suggesting this activity will remain organized for several hours. Most supercell structures have been disorganized along the line, and damaging winds will likely be the primary severe threat, as large hail has been mostly absent with this convection. Scattered-numerous thunderstorm clusters persist across the Middle Atlantic region this evening. 00z soundings from this region exhibit modest lapse rates, but seasonally high PW values. Wind profiles are marginally supportive of organized updrafts so this activity has likely peaked in intensity. Aside from an isolated damaging wind/hail report, the overall severe threat should gradually diminish over the next few hours. ..Darrow.. 08/30/2024 Read more

WW 0664 Status Updates
STATUS FOR WATCH 0664 HAS NOT BEEN ISSUED YET Read more

WW 0664 Status Updates
STATUS FOR WATCH 0664 HAS NOT BEEN ISSUED YET Read more

WW 0662 Status Updates
STATUS REPORT ON WW 662 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 25 WNW MCW TO 40 N MCW. ..KERR..08/30/24 ATTN...WFO...FSD...DLH...MPX...FGF... STATUS REPORT FOR WS 662 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS WIC005-011-017-033-035-107-300140- WI . WISCONSIN COUNTIES INCLUDED ARE BARRON BUFFALO CHIPPEWA DUNN EAU CLAIRE RUSK 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