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WW 0557 Status Updates
STATUS REPORT ON WW 557 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 SSE ONL TO 5 WNW YKN TO 30 SSW BKX. ..SQUITIERI..07/30/25 ATTN...WFO...LBF...OAX...FSD... STATUS REPORT FOR WS 557 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS NEC003-021-027-039-043-051-107-119-139-167-173-179-300240- NE . NEBRASKA COUNTIES INCLUDED ARE ANTELOPE BURT CEDAR CUMING DAKOTA DIXON KNOX MADISON PIERCE STANTON THURSTON WAYNE SDC027-083-099-125-127-300240- SD . SOUTH DAKOTA COUNTIES INCLUDED ARE CLAY LINCOLN MINNEHAHA TURNER UNION 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 557 SEVERE TSTM NE SD 292155Z - 300300Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 557 NWS Storm Prediction Center Norman OK 455 PM CDT Tue Jul 29 2025 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Far Northeast Nebraska Far Southeast South Dakota * Effective this Tuesday afternoon and evening from 455 PM until 1000 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...Thunderstorms across south-central SD are organizing into a convective line that will likely continue southeastward into the very unstable airmass downstream across far southeast SD and far northeast NE. Strong gusts are possible with this line as it moves into this region this afternoon and evening. The severe thunderstorm watch area is approximately along and 60 statute miles north and south of a line from 30 miles south southwest of Chamberlain SD to 15 miles east of Yankton SD. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU7). 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 556... 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 29035. ...Mosier Read more

MD 1838 CONCERNING SEVERE POTENTIAL...WATCH LIKELY FOR FAR SOUTHEAST MONTANA...EASTERN WYOMING...FAR WESTERN SOUTH DAKOTA...FAR WESTERN NEBRASKA
Mesoscale Discussion 1838 NWS Storm Prediction Center Norman OK 0622 PM CDT Tue Jul 29 2025 Areas affected...Far Southeast Montana...Eastern Wyoming...Far Western South Dakota...Far Western Nebraska Concerning...Severe potential...Watch likely Valid 292322Z - 300145Z Probability of Watch Issuance...80 percent SUMMARY...A severe threat will likely develop from far southeast Montana into eastern Wyoming over the next few hours. Isolated large hail and severe wind gusts will be the primary threats. Weather watch issuance will likely be needed. DISCUSSION...Latest surface analysis shows a moist airmass over the central and northern High Plains, with upslope flow in place from western Nebraska and western South Dakota into eastern Wyoming. Surface heating is maximized near a surface trough located in east-central Wyoming. Scattered thunderstorms, with some severe, are ongoing near the trough. Short-term model forecasts including the HRRR, continue to increase convective coverage, suggesting that a line will develop in far southeast Montana and eastern Wyoming over the next couple of hours. RAP forecast soundings in eastern Wyoming early this evening have 0-6 km shear near 40 knots, with 700-500 mb lapse rates of 8.5 C/km. This environment will support a threat for large hail and severe gusts with supercells. Intense multicell line segments may also produce severe wind gusts and hail. ..Broyles/Mosier.. 07/29/2025 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...UNR...CYS...BYZ...RIW... LAT...LON 45630416 45790467 45770546 45530600 44800605 43540603 42090606 41420602 41110544 41070463 41170402 41530352 42190339 43330350 45220397 45630416 MOST PROBABLE PEAK WIND GUST...65-80 MPH MOST PROBABLE PEAK HAIL SIZE...1.50-2.50 IN Read more

WW 0559 Status Updates
STATUS FOR WATCH 0559 HAS NOT BEEN ISSUED YET Read more

WW 0559 Status Updates
STATUS FOR WATCH 0559 HAS NOT BEEN ISSUED YET Read more

WW 0559 Status Updates
STATUS FOR WATCH 0559 HAS NOT BEEN ISSUED YET Read more

WW 0559 Status Updates
STATUS FOR WATCH 0559 HAS NOT BEEN ISSUED YET Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0742 PM CDT Tue Jul 29 2025 Valid 300100Z - 301200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FROM THE NORTHERN HIGH PLAINS INTO PARTS OF THE CORN BELT... ...SUMMARY... Severe thunderstorms remain possible this evening from southeast Montana ad eastern Wyoming across parts of South Dakota, Nebraska, and Iowa. ...Northern High Plains... Widely scattered cells producing severe hail persist this evening in the post frontal/upslope regime from southeast MT into eastern WY. A narrow instability plume ahead of these storms may support a continued hail risk approaching the Black Hills later this evening. For more information see mesoscale discussion 1838. ...NE into western IA... Clusters of storms continue to evolve within a weak shear environment from northwest KS across central NE and into southeast SD where more substantial outflow is present. The primary deep-layer theta-e axis remains across the NE into IA zone, and this strongly unstable and moist air mass will continue to support swaths of damaging winds and marginal hail. The weak wind fields below 500 mb will continue to be a limiting factor to overall severity. ..Jewell.. 07/30/2025 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0742 PM CDT Tue Jul 29 2025 Valid 300100Z - 301200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FROM THE NORTHERN HIGH PLAINS INTO PARTS OF THE CORN BELT... ...SUMMARY... Severe thunderstorms remain possible this evening from southeast Montana ad eastern Wyoming across parts of South Dakota, Nebraska, and Iowa. ...Northern High Plains... Widely scattered cells producing severe hail persist this evening in the post frontal/upslope regime from southeast MT into eastern WY. A narrow instability plume ahead of these storms may support a continued hail risk approaching the Black Hills later this evening. For more information see mesoscale discussion 1838. ...NE into western IA... Clusters of storms continue to evolve within a weak shear environment from northwest KS across central NE and into southeast SD where more substantial outflow is present. The primary deep-layer theta-e axis remains across the NE into IA zone, and this strongly unstable and moist air mass will continue to support swaths of damaging winds and marginal hail. The weak wind fields below 500 mb will continue to be a limiting factor to overall severity. ..Jewell.. 07/30/2025 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0742 PM CDT Tue Jul 29 2025 Valid 300100Z - 301200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FROM THE NORTHERN HIGH PLAINS INTO PARTS OF THE CORN BELT... ...SUMMARY... Severe thunderstorms remain possible this evening from southeast Montana ad eastern Wyoming across parts of South Dakota, Nebraska, and Iowa. ...Northern High Plains... Widely scattered cells producing severe hail persist this evening in the post frontal/upslope regime from southeast MT into eastern WY. A narrow instability plume ahead of these storms may support a continued hail risk approaching the Black Hills later this evening. For more information see mesoscale discussion 1838. ...NE into western IA... Clusters of storms continue to evolve within a weak shear environment from northwest KS across central NE and into southeast SD where more substantial outflow is present. The primary deep-layer theta-e axis remains across the NE into IA zone, and this strongly unstable and moist air mass will continue to support swaths of damaging winds and marginal hail. The weak wind fields below 500 mb will continue to be a limiting factor to overall severity. ..Jewell.. 07/30/2025 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0742 PM CDT Tue Jul 29 2025 Valid 300100Z - 301200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FROM THE NORTHERN HIGH PLAINS INTO PARTS OF THE CORN BELT... ...SUMMARY... Severe thunderstorms remain possible this evening from southeast Montana ad eastern Wyoming across parts of South Dakota, Nebraska, and Iowa. ...Northern High Plains... Widely scattered cells producing severe hail persist this evening in the post frontal/upslope regime from southeast MT into eastern WY. A narrow instability plume ahead of these storms may support a continued hail risk approaching the Black Hills later this evening. For more information see mesoscale discussion 1838. ...NE into western IA... Clusters of storms continue to evolve within a weak shear environment from northwest KS across central NE and into southeast SD where more substantial outflow is present. The primary deep-layer theta-e axis remains across the NE into IA zone, and this strongly unstable and moist air mass will continue to support swaths of damaging winds and marginal hail. The weak wind fields below 500 mb will continue to be a limiting factor to overall severity. ..Jewell.. 07/30/2025 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0742 PM CDT Tue Jul 29 2025 Valid 300100Z - 301200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FROM THE NORTHERN HIGH PLAINS INTO PARTS OF THE CORN BELT... ...SUMMARY... Severe thunderstorms remain possible this evening from southeast Montana ad eastern Wyoming across parts of South Dakota, Nebraska, and Iowa. ...Northern High Plains... Widely scattered cells producing severe hail persist this evening in the post frontal/upslope regime from southeast MT into eastern WY. A narrow instability plume ahead of these storms may support a continued hail risk approaching the Black Hills later this evening. For more information see mesoscale discussion 1838. ...NE into western IA... Clusters of storms continue to evolve within a weak shear environment from northwest KS across central NE and into southeast SD where more substantial outflow is present. The primary deep-layer theta-e axis remains across the NE into IA zone, and this strongly unstable and moist air mass will continue to support swaths of damaging winds and marginal hail. The weak wind fields below 500 mb will continue to be a limiting factor to overall severity. ..Jewell.. 07/30/2025 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0742 PM CDT Tue Jul 29 2025 Valid 300100Z - 301200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FROM THE NORTHERN HIGH PLAINS INTO PARTS OF THE CORN BELT... ...SUMMARY... Severe thunderstorms remain possible this evening from southeast Montana ad eastern Wyoming across parts of South Dakota, Nebraska, and Iowa. ...Northern High Plains... Widely scattered cells producing severe hail persist this evening in the post frontal/upslope regime from southeast MT into eastern WY. A narrow instability plume ahead of these storms may support a continued hail risk approaching the Black Hills later this evening. For more information see mesoscale discussion 1838. ...NE into western IA... Clusters of storms continue to evolve within a weak shear environment from northwest KS across central NE and into southeast SD where more substantial outflow is present. The primary deep-layer theta-e axis remains across the NE into IA zone, and this strongly unstable and moist air mass will continue to support swaths of damaging winds and marginal hail. The weak wind fields below 500 mb will continue to be a limiting factor to overall severity. ..Jewell.. 07/30/2025 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0742 PM CDT Tue Jul 29 2025 Valid 300100Z - 301200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FROM THE NORTHERN HIGH PLAINS INTO PARTS OF THE CORN BELT... ...SUMMARY... Severe thunderstorms remain possible this evening from southeast Montana ad eastern Wyoming across parts of South Dakota, Nebraska, and Iowa. ...Northern High Plains... Widely scattered cells producing severe hail persist this evening in the post frontal/upslope regime from southeast MT into eastern WY. A narrow instability plume ahead of these storms may support a continued hail risk approaching the Black Hills later this evening. For more information see mesoscale discussion 1838. ...NE into western IA... Clusters of storms continue to evolve within a weak shear environment from northwest KS across central NE and into southeast SD where more substantial outflow is present. The primary deep-layer theta-e axis remains across the NE into IA zone, and this strongly unstable and moist air mass will continue to support swaths of damaging winds and marginal hail. The weak wind fields below 500 mb will continue to be a limiting factor to overall severity. ..Jewell.. 07/30/2025 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0742 PM CDT Tue Jul 29 2025 Valid 300100Z - 301200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FROM THE NORTHERN HIGH PLAINS INTO PARTS OF THE CORN BELT... ...SUMMARY... Severe thunderstorms remain possible this evening from southeast Montana ad eastern Wyoming across parts of South Dakota, Nebraska, and Iowa. ...Northern High Plains... Widely scattered cells producing severe hail persist this evening in the post frontal/upslope regime from southeast MT into eastern WY. A narrow instability plume ahead of these storms may support a continued hail risk approaching the Black Hills later this evening. For more information see mesoscale discussion 1838. ...NE into western IA... Clusters of storms continue to evolve within a weak shear environment from northwest KS across central NE and into southeast SD where more substantial outflow is present. The primary deep-layer theta-e axis remains across the NE into IA zone, and this strongly unstable and moist air mass will continue to support swaths of damaging winds and marginal hail. The weak wind fields below 500 mb will continue to be a limiting factor to overall severity. ..Jewell.. 07/30/2025 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0742 PM CDT Tue Jul 29 2025 Valid 300100Z - 301200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FROM THE NORTHERN HIGH PLAINS INTO PARTS OF THE CORN BELT... ...SUMMARY... Severe thunderstorms remain possible this evening from southeast Montana ad eastern Wyoming across parts of South Dakota, Nebraska, and Iowa. ...Northern High Plains... Widely scattered cells producing severe hail persist this evening in the post frontal/upslope regime from southeast MT into eastern WY. A narrow instability plume ahead of these storms may support a continued hail risk approaching the Black Hills later this evening. For more information see mesoscale discussion 1838. ...NE into western IA... Clusters of storms continue to evolve within a weak shear environment from northwest KS across central NE and into southeast SD where more substantial outflow is present. The primary deep-layer theta-e axis remains across the NE into IA zone, and this strongly unstable and moist air mass will continue to support swaths of damaging winds and marginal hail. The weak wind fields below 500 mb will continue to be a limiting factor to overall severity. ..Jewell.. 07/30/2025 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0742 PM CDT Tue Jul 29 2025 Valid 300100Z - 301200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FROM THE NORTHERN HIGH PLAINS INTO PARTS OF THE CORN BELT... ...SUMMARY... Severe thunderstorms remain possible this evening from southeast Montana ad eastern Wyoming across parts of South Dakota, Nebraska, and Iowa. ...Northern High Plains... Widely scattered cells producing severe hail persist this evening in the post frontal/upslope regime from southeast MT into eastern WY. A narrow instability plume ahead of these storms may support a continued hail risk approaching the Black Hills later this evening. For more information see mesoscale discussion 1838. ...NE into western IA... Clusters of storms continue to evolve within a weak shear environment from northwest KS across central NE and into southeast SD where more substantial outflow is present. The primary deep-layer theta-e axis remains across the NE into IA zone, and this strongly unstable and moist air mass will continue to support swaths of damaging winds and marginal hail. The weak wind fields below 500 mb will continue to be a limiting factor to overall severity. ..Jewell.. 07/30/2025 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0742 PM CDT Tue Jul 29 2025 Valid 300100Z - 301200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FROM THE NORTHERN HIGH PLAINS INTO PARTS OF THE CORN BELT... ...SUMMARY... Severe thunderstorms remain possible this evening from southeast Montana ad eastern Wyoming across parts of South Dakota, Nebraska, and Iowa. ...Northern High Plains... Widely scattered cells producing severe hail persist this evening in the post frontal/upslope regime from southeast MT into eastern WY. A narrow instability plume ahead of these storms may support a continued hail risk approaching the Black Hills later this evening. For more information see mesoscale discussion 1838. ...NE into western IA... Clusters of storms continue to evolve within a weak shear environment from northwest KS across central NE and into southeast SD where more substantial outflow is present. The primary deep-layer theta-e axis remains across the NE into IA zone, and this strongly unstable and moist air mass will continue to support swaths of damaging winds and marginal hail. The weak wind fields below 500 mb will continue to be a limiting factor to overall severity. ..Jewell.. 07/30/2025 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0742 PM CDT Tue Jul 29 2025 Valid 300100Z - 301200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FROM THE NORTHERN HIGH PLAINS INTO PARTS OF THE CORN BELT... ...SUMMARY... Severe thunderstorms remain possible this evening from southeast Montana ad eastern Wyoming across parts of South Dakota, Nebraska, and Iowa. ...Northern High Plains... Widely scattered cells producing severe hail persist this evening in the post frontal/upslope regime from southeast MT into eastern WY. A narrow instability plume ahead of these storms may support a continued hail risk approaching the Black Hills later this evening. For more information see mesoscale discussion 1838. ...NE into western IA... Clusters of storms continue to evolve within a weak shear environment from northwest KS across central NE and into southeast SD where more substantial outflow is present. The primary deep-layer theta-e axis remains across the NE into IA zone, and this strongly unstable and moist air mass will continue to support swaths of damaging winds and marginal hail. The weak wind fields below 500 mb will continue to be a limiting factor to overall severity. ..Jewell.. 07/30/2025 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0742 PM CDT Tue Jul 29 2025 Valid 300100Z - 301200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FROM THE NORTHERN HIGH PLAINS INTO PARTS OF THE CORN BELT... ...SUMMARY... Severe thunderstorms remain possible this evening from southeast Montana ad eastern Wyoming across parts of South Dakota, Nebraska, and Iowa. ...Northern High Plains... Widely scattered cells producing severe hail persist this evening in the post frontal/upslope regime from southeast MT into eastern WY. A narrow instability plume ahead of these storms may support a continued hail risk approaching the Black Hills later this evening. For more information see mesoscale discussion 1838. ...NE into western IA... Clusters of storms continue to evolve within a weak shear environment from northwest KS across central NE and into southeast SD where more substantial outflow is present. The primary deep-layer theta-e axis remains across the NE into IA zone, and this strongly unstable and moist air mass will continue to support swaths of damaging winds and marginal hail. The weak wind fields below 500 mb will continue to be a limiting factor to overall severity. ..Jewell.. 07/30/2025 Read more