Severe Storms

WW 0565 Status Updates
STATUS REPORT ON WW 565 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 25 NE OMA TO 35 SE SLB TO 30 NNW FOD. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1738. ..GRAMS..07/30/24 ATTN...WFO...DMX... STATUS REPORT FOR WS 565 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS IAC001-009-015-025-027-029-049-073-077-079-091-151-187-197- 300740- IA . IOWA COUNTIES INCLUDED ARE ADAIR AUDUBON BOONE CALHOUN CARROLL CASS DALLAS GREENE GUTHRIE HAMILTON HUMBOLDT POCAHONTAS WEBSTER WRIGHT 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 565 SEVERE TSTM IA 300455Z - 300800Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 565 NWS Storm Prediction Center Norman OK 1155 PM CDT Mon Jul 29 2024 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of West Central Iowa * Effective this Monday night and Tuesday morning from 1155 PM until 300 AM CDT. * Primary threats include... Scattered damaging wind gusts to 70 mph possible Isolated large hail events to 1.5 inches in diameter possible SUMMARY...A fast-moving line of thunderstorms over western Iowa will track eastward for the next 2-3 hours, continuing to pose a risk of locally damaging wind gusts. The severe thunderstorm watch area is approximately along and 50 statute miles north and south of a line from 30 miles northwest of Denison IA to 35 miles southeast of Fort Dodge IA. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU5). 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 561...WW 562...WW 563...WW 564... 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. ...Hart Read more

MD 1736 CONCERNING SEVERE THUNDERSTORM WATCH 563... FOR PARTS OF NORTHWEST/WEST CENTRAL IOWA AND ADJACENT NORTHEASTERN NEBRASKA
Mesoscale Discussion 1736 NWS Storm Prediction Center Norman OK 1141 PM CDT Mon Jul 29 2024 Areas affected...parts of northwest/west central Iowa and adjacent northeastern Nebraska Concerning...Severe Thunderstorm Watch 563... Valid 300441Z - 300645Z The severe weather threat for Severe Thunderstorm Watch 563 continues. SUMMARY...A compact, but well-organized cluster of storms is being maintained across the Sioux City area, and it possible that this activity may continue to pose a risk for strong to severe wind gusts for at least a few more hours. DISCUSSION...Despite the presence of strong lower/mid-tropospheric inhibition, convection has become better organized in a compact cluster now propagating across and east-southeast of the Sioux City area. The associated surface cold pool included 2 hourly pressure rises of 5.7 mb at Yankton during the 04Z obs, and a small MCV has become well-defined. Given the 40 kt forward propagation of this cluster, strong low-level inflow of moist boundary-layer air characterized by CAPE in excess in excess of 2000 J/kg might still continue to overcome the mid-level inhibition at least a few more hours. ..Kerr.. 07/30/2024 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...DMX...FSD...OAX... LAT...LON 43129630 42539457 41559404 41439495 41919624 42109669 42229636 43129630 Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0139 AM CDT Tue Jul 30 2024 Valid 311200Z - 011200Z ...NO CRITICAL AREAS... ...Synopsis... A large-scale ridge will build across the western CONUS -- in the wake of an eastward-moving trough over the northern Plains. While this will promote increasingly warm/dry conditions across much of the West, generally weak surface winds (outside of terrain-favored areas) preclude any fire-weather highlights at this time. ..Weinman.. 07/30/2024 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0139 AM CDT Tue Jul 30 2024 Valid 311200Z - 011200Z ...NO CRITICAL AREAS... ...Synopsis... A large-scale ridge will build across the western CONUS -- in the wake of an eastward-moving trough over the northern Plains. While this will promote increasingly warm/dry conditions across much of the West, generally weak surface winds (outside of terrain-favored areas) preclude any fire-weather highlights at this time. ..Weinman.. 07/30/2024 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0139 AM CDT Tue Jul 30 2024 Valid 311200Z - 011200Z ...NO CRITICAL AREAS... ...Synopsis... A large-scale ridge will build across the western CONUS -- in the wake of an eastward-moving trough over the northern Plains. While this will promote increasingly warm/dry conditions across much of the West, generally weak surface winds (outside of terrain-favored areas) preclude any fire-weather highlights at this time. ..Weinman.. 07/30/2024 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0139 AM CDT Tue Jul 30 2024 Valid 311200Z - 011200Z ...NO CRITICAL AREAS... ...Synopsis... A large-scale ridge will build across the western CONUS -- in the wake of an eastward-moving trough over the northern Plains. While this will promote increasingly warm/dry conditions across much of the West, generally weak surface winds (outside of terrain-favored areas) preclude any fire-weather highlights at this time. ..Weinman.. 07/30/2024 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0139 AM CDT Tue Jul 30 2024 Valid 311200Z - 011200Z ...NO CRITICAL AREAS... ...Synopsis... A large-scale ridge will build across the western CONUS -- in the wake of an eastward-moving trough over the northern Plains. While this will promote increasingly warm/dry conditions across much of the West, generally weak surface winds (outside of terrain-favored areas) preclude any fire-weather highlights at this time. ..Weinman.. 07/30/2024 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0139 AM CDT Tue Jul 30 2024 Valid 311200Z - 011200Z ...NO CRITICAL AREAS... ...Synopsis... A large-scale ridge will build across the western CONUS -- in the wake of an eastward-moving trough over the northern Plains. While this will promote increasingly warm/dry conditions across much of the West, generally weak surface winds (outside of terrain-favored areas) preclude any fire-weather highlights at this time. ..Weinman.. 07/30/2024 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0139 AM CDT Tue Jul 30 2024 Valid 311200Z - 011200Z ...NO CRITICAL AREAS... ...Synopsis... A large-scale ridge will build across the western CONUS -- in the wake of an eastward-moving trough over the northern Plains. While this will promote increasingly warm/dry conditions across much of the West, generally weak surface winds (outside of terrain-favored areas) preclude any fire-weather highlights at this time. ..Weinman.. 07/30/2024 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0139 AM CDT Tue Jul 30 2024 Valid 311200Z - 011200Z ...NO CRITICAL AREAS... ...Synopsis... A large-scale ridge will build across the western CONUS -- in the wake of an eastward-moving trough over the northern Plains. While this will promote increasingly warm/dry conditions across much of the West, generally weak surface winds (outside of terrain-favored areas) preclude any fire-weather highlights at this time. ..Weinman.. 07/30/2024 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0139 AM CDT Tue Jul 30 2024 Valid 311200Z - 011200Z ...NO CRITICAL AREAS... ...Synopsis... A large-scale ridge will build across the western CONUS -- in the wake of an eastward-moving trough over the northern Plains. While this will promote increasingly warm/dry conditions across much of the West, generally weak surface winds (outside of terrain-favored areas) preclude any fire-weather highlights at this time. ..Weinman.. 07/30/2024 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0139 AM CDT Tue Jul 30 2024 Valid 311200Z - 011200Z ...NO CRITICAL AREAS... ...Synopsis... A large-scale ridge will build across the western CONUS -- in the wake of an eastward-moving trough over the northern Plains. While this will promote increasingly warm/dry conditions across much of the West, generally weak surface winds (outside of terrain-favored areas) preclude any fire-weather highlights at this time. ..Weinman.. 07/30/2024 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0139 AM CDT Tue Jul 30 2024 Valid 311200Z - 011200Z ...NO CRITICAL AREAS... ...Synopsis... A large-scale ridge will build across the western CONUS -- in the wake of an eastward-moving trough over the northern Plains. While this will promote increasingly warm/dry conditions across much of the West, generally weak surface winds (outside of terrain-favored areas) preclude any fire-weather highlights at this time. ..Weinman.. 07/30/2024 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0139 AM CDT Tue Jul 30 2024 Valid 311200Z - 011200Z ...NO CRITICAL AREAS... ...Synopsis... A large-scale ridge will build across the western CONUS -- in the wake of an eastward-moving trough over the northern Plains. While this will promote increasingly warm/dry conditions across much of the West, generally weak surface winds (outside of terrain-favored areas) preclude any fire-weather highlights at this time. ..Weinman.. 07/30/2024 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0139 AM CDT Tue Jul 30 2024 Valid 311200Z - 011200Z ...NO CRITICAL AREAS... ...Synopsis... A large-scale ridge will build across the western CONUS -- in the wake of an eastward-moving trough over the northern Plains. While this will promote increasingly warm/dry conditions across much of the West, generally weak surface winds (outside of terrain-favored areas) preclude any fire-weather highlights at this time. ..Weinman.. 07/30/2024 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0139 AM CDT Tue Jul 30 2024 Valid 311200Z - 011200Z ...NO CRITICAL AREAS... ...Synopsis... A large-scale ridge will build across the western CONUS -- in the wake of an eastward-moving trough over the northern Plains. While this will promote increasingly warm/dry conditions across much of the West, generally weak surface winds (outside of terrain-favored areas) preclude any fire-weather highlights at this time. ..Weinman.. 07/30/2024 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0139 AM CDT Tue Jul 30 2024 Valid 311200Z - 011200Z ...NO CRITICAL AREAS... ...Synopsis... A large-scale ridge will build across the western CONUS -- in the wake of an eastward-moving trough over the northern Plains. While this will promote increasingly warm/dry conditions across much of the West, generally weak surface winds (outside of terrain-favored areas) preclude any fire-weather highlights at this time. ..Weinman.. 07/30/2024 ...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 0138 AM CDT Tue Jul 30 2024 Valid 301200Z - 311200Z ...Synopsis... A midlevel trough will move eastward across the northern Rockies and adjacent Plains during the day. Along/south of the trough, moderate west-southwesterly midlevel flow will overspread the Great Basin into the northern/central Rockies. ...Dry Thunderstorms - Northern Rockies/Intermountain West... Large-scale ascent accompanying the midlevel trough will promote widely scattered thunderstorms across portions of ID and western MT during the afternoon and evening. While 0.6-0.9 inch PW will favor a mix of wet/dry thunderstorms, 25-35 mph storm motions may tend to limit overall rainfall in any given area. Nevertheless, lightning-induced ignitions will be possible on the peripheries of rain cores, given dry fuels across the area. ...Dry/Windy - Great Basin into the Central Rockies... Deep boundary-layer mixing into the enhanced flow aloft will yield 5-10 percent RH and 15-20 mph sustained west-southwesterly surface winds from southern UT into WY -- with the strongest winds expected over WY. These dry/breezy conditions atop modestly receptive fuels will favor elevated fire-weather conditions during the afternoon. ..Weinman.. 07/30/2024 ...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 0138 AM CDT Tue Jul 30 2024 Valid 301200Z - 311200Z ...Synopsis... A midlevel trough will move eastward across the northern Rockies and adjacent Plains during the day. Along/south of the trough, moderate west-southwesterly midlevel flow will overspread the Great Basin into the northern/central Rockies. ...Dry Thunderstorms - Northern Rockies/Intermountain West... Large-scale ascent accompanying the midlevel trough will promote widely scattered thunderstorms across portions of ID and western MT during the afternoon and evening. While 0.6-0.9 inch PW will favor a mix of wet/dry thunderstorms, 25-35 mph storm motions may tend to limit overall rainfall in any given area. Nevertheless, lightning-induced ignitions will be possible on the peripheries of rain cores, given dry fuels across the area. ...Dry/Windy - Great Basin into the Central Rockies... Deep boundary-layer mixing into the enhanced flow aloft will yield 5-10 percent RH and 15-20 mph sustained west-southwesterly surface winds from southern UT into WY -- with the strongest winds expected over WY. These dry/breezy conditions atop modestly receptive fuels will favor elevated fire-weather conditions during the afternoon. ..Weinman.. 07/30/2024 ...Please see www.spc.noaa.gov/fire for graphic product... Read more