Severe Storms

MD 1279 CONCERNING SEVERE THUNDERSTORM WATCH 411... FOR PARTS OF SOUTH-CENTRAL/SOUTHEAST MT INTO FAR NORTHERN WY
Mesoscale Discussion 1279 NWS Storm Prediction Center Norman OK 0823 PM CDT Fri Jun 13 2025 Areas affected...Parts of south-central/southeast MT into far northern WY Concerning...Severe Thunderstorm Watch 411... Valid 140123Z - 140300Z The severe weather threat for Severe Thunderstorm Watch 411 continues. SUMMARY...A threat for severe gusts, hail, and possibly a tornado will continue east-southeastward this evening. DISCUSSION...A small but intense supercell cluster has evolved east of Billings, where moderate buoyancy and strong deep-layer shear remain very supportive of organized convection. This cluster appears capable of producing a localized swath of severe gusts (potentially near/above 75 mph) as it moves east-southeastward this evening, along with large to very large hail (possibly wind-driven). A tornado also cannot be ruled out, given the presence of an embedded supercell structure and modestly favorable downstream low-level moisture and effective SRH. Farther southwest, a supercell has recently intensified along the trailing outflow south of Billings, with additional storm development possible closer to the MT/WY border with time. These cells developing near or just behind the trailing outflow could also pose at least an isolated severe threat through the evening. ..Dean.. 06/14/2025 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...UNR...BYZ...RIW... LAT...LON 45530838 45810791 46530719 46530569 45800530 45390530 44760566 44770749 44890844 44980920 45250931 45530838 MOST PROBABLE PEAK TORNADO INTENSITY...UP TO 95 MPH MOST PROBABLE PEAK WIND GUST...65-80 MPH MOST PROBABLE PEAK HAIL SIZE...2.00-3.50 IN Read more

WW 0412 Status Updates
STATUS REPORT ON WW 412 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 S AKO TO 30 SSE BFF TO 10 NW AIA. ..SUPINIE..06/14/25 ATTN...WFO...BOU...GLD...CYS...LBF...UNR...RIW... STATUS REPORT FOR WS 412 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS COC075-095-115-121-125-140340- CO . COLORADO COUNTIES INCLUDED ARE LOGAN PHILLIPS SEDGWICK WASHINGTON YUMA NEC033-049-069-123-140340- NE . NEBRASKA COUNTIES INCLUDED ARE CHEYENNE DEUEL GARDEN MORRILL SDC047-140340- SD . SOUTH DAKOTA COUNTIES INCLUDED ARE FALL RIVER Read more

WW 0412 Status Updates
STATUS REPORT ON WW 412 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 S AKO TO 30 SSE BFF TO 10 NW AIA. ..SUPINIE..06/14/25 ATTN...WFO...BOU...GLD...CYS...LBF...UNR...RIW... STATUS REPORT FOR WS 412 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS COC075-095-115-121-125-140340- CO . COLORADO COUNTIES INCLUDED ARE LOGAN PHILLIPS SEDGWICK WASHINGTON YUMA NEC033-049-069-123-140340- NE . NEBRASKA COUNTIES INCLUDED ARE CHEYENNE DEUEL GARDEN MORRILL SDC047-140340- SD . SOUTH DAKOTA COUNTIES INCLUDED ARE FALL RIVER Read more

WW 0412 Status Updates
STATUS REPORT ON WW 412 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 S AKO TO 30 SSE BFF TO 10 NW AIA. ..SUPINIE..06/14/25 ATTN...WFO...BOU...GLD...CYS...LBF...UNR...RIW... STATUS REPORT FOR WS 412 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS COC075-095-115-121-125-140340- CO . COLORADO COUNTIES INCLUDED ARE LOGAN PHILLIPS SEDGWICK WASHINGTON YUMA NEC033-049-069-123-140340- NE . NEBRASKA COUNTIES INCLUDED ARE CHEYENNE DEUEL GARDEN MORRILL SDC047-140340- SD . SOUTH DAKOTA COUNTIES INCLUDED ARE FALL RIVER Read more

WW 0412 Status Updates
STATUS REPORT ON WW 412 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 S AKO TO 30 SSE BFF TO 10 NW AIA. ..SUPINIE..06/14/25 ATTN...WFO...BOU...GLD...CYS...LBF...UNR...RIW... STATUS REPORT FOR WS 412 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS COC075-095-115-121-125-140340- CO . COLORADO COUNTIES INCLUDED ARE LOGAN PHILLIPS SEDGWICK WASHINGTON YUMA NEC033-049-069-123-140340- NE . NEBRASKA COUNTIES INCLUDED ARE CHEYENNE DEUEL GARDEN MORRILL SDC047-140340- SD . SOUTH DAKOTA COUNTIES INCLUDED ARE FALL RIVER Read more

WW 0412 Status Updates
STATUS REPORT ON WW 412 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 S AKO TO 30 SSE BFF TO 10 NW AIA. ..SUPINIE..06/14/25 ATTN...WFO...BOU...GLD...CYS...LBF...UNR...RIW... STATUS REPORT FOR WS 412 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS COC075-095-115-121-125-140340- CO . COLORADO COUNTIES INCLUDED ARE LOGAN PHILLIPS SEDGWICK WASHINGTON YUMA NEC033-049-069-123-140340- NE . NEBRASKA COUNTIES INCLUDED ARE CHEYENNE DEUEL GARDEN MORRILL SDC047-140340- SD . SOUTH DAKOTA COUNTIES INCLUDED ARE FALL RIVER Read more

WW 0412 Status Updates
STATUS REPORT ON WW 412 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 S AKO TO 30 SSE BFF TO 10 NW AIA. ..SUPINIE..06/14/25 ATTN...WFO...BOU...GLD...CYS...LBF...UNR...RIW... STATUS REPORT FOR WS 412 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS COC075-095-115-121-125-140340- CO . COLORADO COUNTIES INCLUDED ARE LOGAN PHILLIPS SEDGWICK WASHINGTON YUMA NEC033-049-069-123-140340- NE . NEBRASKA COUNTIES INCLUDED ARE CHEYENNE DEUEL GARDEN MORRILL SDC047-140340- SD . SOUTH DAKOTA COUNTIES INCLUDED ARE FALL RIVER Read more

WW 412 SEVERE TSTM CO NE SD WY 132000Z - 140400Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 412 NWS Storm Prediction Center Norman OK 200 PM MDT Fri Jun 13 2025 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Northeast Colorado Western Nebraska Extreme southwest South Dakota Eastern Wyoming * Effective this Friday afternoon and evening from 200 PM until 1000 PM MDT. * Primary threats include... Scattered damaging winds likely with isolated significant gusts to 75 mph possible Scattered large hail and isolated very large hail events to 2 inches in diameter possible SUMMARY...Thunderstorms are expected to form and spread east of the higher terrain, with the potential for clustering/upscale growth by this evening. Large hail will be possible with the initial, more cellular storms (especially across northeast Wyoming where a supercell or two will be possible). However, severe outflow gusts of 60-75 mph will become the main threat later this evening as storm clusters spread east-southeastward over the High Plains. The severe thunderstorm watch area is approximately along and 60 statute miles east and west of a line from 50 miles north northwest of Gillette WY to 15 miles southeast of Akron CO. 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. && OTHER WATCH INFORMATION...CONTINUE...WW 411... AVIATION...A few severe thunderstorms with hail surface and aloft to 2 inches. Extreme turbulence and surface wind gusts to 65 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 28020. ...Thompson Read more

WW 0413 Status Updates
STATUS FOR WATCH 0413 HAS NOT BEEN ISSUED YET Read more

WW 0413 Status Updates
STATUS FOR WATCH 0413 HAS NOT BEEN ISSUED YET Read more

WW 0411 Status Updates
STATUS REPORT ON WW 411 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 40 E WEY TO 80 NE BIL TO 70 WSW GGW TO 65 ESE HVR TO 70 NE HVR. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1270 ..DEAN..06/14/25 ATTN...WFO...BYZ...TFX...GGW... STATUS REPORT FOR WS 411 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS MTC003-009-011-017-033-071-075-079-087-103-105-111-140340- MT . MONTANA COUNTIES INCLUDED ARE BIG HORN CARBON CARTER CUSTER GARFIELD PHILLIPS POWDER RIVER PRAIRIE ROSEBUD TREASURE VALLEY YELLOWSTONE WYC033-140340- WY . WYOMING COUNTIES INCLUDED ARE SHERIDAN 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 0411 Status Updates
STATUS REPORT ON WW 411 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 40 E WEY TO 80 NE BIL TO 70 WSW GGW TO 65 ESE HVR TO 70 NE HVR. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1270 ..DEAN..06/14/25 ATTN...WFO...BYZ...TFX...GGW... STATUS REPORT FOR WS 411 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS MTC003-009-011-017-033-071-075-079-087-103-105-111-140340- MT . MONTANA COUNTIES INCLUDED ARE BIG HORN CARBON CARTER CUSTER GARFIELD PHILLIPS POWDER RIVER PRAIRIE ROSEBUD TREASURE VALLEY YELLOWSTONE WYC033-140340- WY . WYOMING COUNTIES INCLUDED ARE SHERIDAN 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 0411 Status Updates
STATUS REPORT ON WW 411 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 40 E WEY TO 80 NE BIL TO 70 WSW GGW TO 65 ESE HVR TO 70 NE HVR. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1270 ..DEAN..06/14/25 ATTN...WFO...BYZ...TFX...GGW... STATUS REPORT FOR WS 411 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS MTC003-009-011-017-033-071-075-079-087-103-105-111-140340- MT . MONTANA COUNTIES INCLUDED ARE BIG HORN CARBON CARTER CUSTER GARFIELD PHILLIPS POWDER RIVER PRAIRIE ROSEBUD TREASURE VALLEY YELLOWSTONE WYC033-140340- WY . WYOMING COUNTIES INCLUDED ARE SHERIDAN 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 0411 Status Updates
STATUS REPORT ON WW 411 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 40 E WEY TO 80 NE BIL TO 70 WSW GGW TO 65 ESE HVR TO 70 NE HVR. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1270 ..DEAN..06/14/25 ATTN...WFO...BYZ...TFX...GGW... STATUS REPORT FOR WS 411 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS MTC003-009-011-017-033-071-075-079-087-103-105-111-140340- MT . MONTANA COUNTIES INCLUDED ARE BIG HORN CARBON CARTER CUSTER GARFIELD PHILLIPS POWDER RIVER PRAIRIE ROSEBUD TREASURE VALLEY YELLOWSTONE WYC033-140340- WY . WYOMING COUNTIES INCLUDED ARE SHERIDAN 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 0411 Status Updates
STATUS REPORT ON WW 411 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 40 E WEY TO 80 NE BIL TO 70 WSW GGW TO 65 ESE HVR TO 70 NE HVR. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1270 ..DEAN..06/14/25 ATTN...WFO...BYZ...TFX...GGW... STATUS REPORT FOR WS 411 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS MTC003-009-011-017-033-071-075-079-087-103-105-111-140340- MT . MONTANA COUNTIES INCLUDED ARE BIG HORN CARBON CARTER CUSTER GARFIELD PHILLIPS POWDER RIVER PRAIRIE ROSEBUD TREASURE VALLEY YELLOWSTONE WYC033-140340- WY . WYOMING COUNTIES INCLUDED ARE SHERIDAN 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 0411 Status Updates
STATUS REPORT ON WW 411 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 40 E WEY TO 80 NE BIL TO 70 WSW GGW TO 65 ESE HVR TO 70 NE HVR. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1270 ..DEAN..06/14/25 ATTN...WFO...BYZ...TFX...GGW... STATUS REPORT FOR WS 411 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS MTC003-009-011-017-033-071-075-079-087-103-105-111-140340- MT . MONTANA COUNTIES INCLUDED ARE BIG HORN CARBON CARTER CUSTER GARFIELD PHILLIPS POWDER RIVER PRAIRIE ROSEBUD TREASURE VALLEY YELLOWSTONE WYC033-140340- WY . WYOMING COUNTIES INCLUDED ARE SHERIDAN 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 411 SEVERE TSTM MT WY 131900Z - 140300Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 411 NWS Storm Prediction Center Norman OK 100 PM MDT Fri Jun 13 2025 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Central and southeast Montana North central Wyoming * Effective this Friday afternoon and evening from 100 PM until 900 PM MDT. * Primary threats include... Scattered large hail and isolated very large hail events to 2.5 inches in diameter likely Scattered damaging winds and isolated significant gusts to 75 mph possible A tornado or two possible SUMMARY...Supercell development is expected this afternoon into central Montana and storms will spread eastward through late evening. Large hail up to 2.5 inches in diameter will be a primary threat, along with thunderstorm outflow gusts of 60-75 mph. There is also a low threat for an isolated tornado or two. The severe thunderstorm watch area is approximately along and 115 statute miles east and west of a line from 70 miles north of Lewistown MT to 60 miles south southeast of Billings MT. 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. && AVIATION...A few severe thunderstorms with hail surface and aloft to 2.5 inches. Extreme turbulence and surface wind gusts to 65 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 27025. ...Thompson Read more

WW 0412 Status Updates
STATUS REPORT ON WW 412 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 SW AKO TO 35 NW CDR TO 40 NNE CPR. ..SUPINIE..06/14/25 ATTN...WFO...BOU...GLD...CYS...LBF...UNR...RIW... STATUS REPORT FOR WS 412 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS COC075-095-115-121-125-140240- CO . COLORADO COUNTIES INCLUDED ARE LOGAN PHILLIPS SEDGWICK WASHINGTON YUMA NEC013-033-045-049-069-123-140240- NE . NEBRASKA COUNTIES INCLUDED ARE BOX BUTTE CHEYENNE DAWES DEUEL GARDEN MORRILL SDC047-140240- SD . SOUTH DAKOTA COUNTIES INCLUDED ARE FALL RIVER Read more

MD 1278 CONCERNING SEVERE POTENTIAL...WATCH POSSIBLE FOR PARTS OF WESTERN NEBRASKA...NORTHEAST COLORADO...AND NORTHWEST KANSAS
Mesoscale Discussion 1278 NWS Storm Prediction Center Norman OK 0802 PM CDT Fri Jun 13 2025 Areas affected...parts of western Nebraska...northeast Colorado...and northwest Kansas Concerning...Severe potential...Watch possible Valid 140102Z - 140200Z Probability of Watch Issuance...60 percent SUMMARY...Clusters of storms may produce a threat for severe gusts and perhaps some large hail. A watch downstream of WW412 may be needed. DISCUSSION...Convection is ongoing across parts of western Nebraska, which has produced occasional severe/damaging gusts and large hail. Ahead of the convection, surface mixing ratios are near 15 g/kg per mesoanalysis, and short-term model guidance suggests a seasonably modest nocturnal low-level jet ought to reinforce convection despite the loss of daytime heating. Wave clouds in visible satellite suggests some lingering surface stability across parts of central Nebraska. However, based on the 21Z LBF RAOB with 7-8 C/km low-level lapse rates, this can easily be overcome by a well-developed cold pool. These suggest that damaging winds will be the primary threat with these storms. With the more isolated cells, some large hail is possible, though storms are expected to continue to cluster with time, so this may limit the longevity of the hail threat. Additionally, the duration of the severe threat in the northern part of this region is uncertain, with convection approaching stable air north of a stationary boundary. ..Supinie/Smith.. 06/14/2025 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...GID...LBF...DDC...UNR...GLD...PUB...BOU...CYS... LAT...LON 41100322 42810335 43200350 43320300 43220230 42930106 42150053 40620005 39120027 38360156 38490289 39040336 41100322 MOST PROBABLE PEAK TORNADO INTENSITY...UP TO 95 MPH MOST PROBABLE PEAK WIND GUST...65-80 MPH MOST PROBABLE PEAK HAIL SIZE...1.00-1.75 IN Read more

WW 0411 Status Updates
STATUS REPORT ON WW 411 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 35 SSE HLN TO 55 ESE HVR. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1279 ..DEAN..06/14/25 ATTN...WFO...BYZ...TFX...GGW... STATUS REPORT FOR WS 411 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS MTC003-009-011-017-033-037-065-069-071-075-079-087-095-097-103- 111-140240- MT . MONTANA COUNTIES INCLUDED ARE BIG HORN CARBON CARTER CUSTER GARFIELD GOLDEN VALLEY MUSSELSHELL PETROLEUM PHILLIPS POWDER RIVER PRAIRIE ROSEBUD STILLWATER SWEET GRASS TREASURE YELLOWSTONE WYC033-140240- WY . WYOMING COUNTIES INCLUDED ARE SHERIDAN THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE Read more