Hazard Tornadoes EF2+ Tornadoes Likelihood Low Very Low Severe Wind 65 kt+ Wind Moderate Low Severe Hail 2"+ Hail Moderate Moderate

Note: The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.

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SEL8 URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 238 NWS Storm Prediction Center Norman OK 405 PM MDT Sun May 31 2020 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Parts of east central and southeast Montana Southwest North Dakota West central and northwest South Dakota Northeast Wyoming * Effective this Sunday afternoon and evening from 405 PM until 1000 PM MDT. * Primary threats include... Scattered large hail and isolated very large hail events to 2 inches in diameter possible Scattered damaging wind gusts to 70 mph possible SUMMARY...Scattered thunderstorm development is underway along and east of a surface trough, and the storms will encounter somewhat richer moisture to the east and should intensify some this evening. The storm environment is supportive of a mix of organized clusters and supercells, with the attendant threat for large hail and damaging winds. The severe thunderstorm watch area is approximately along and 60 statute miles east and west of a line from 15 miles east northeast of Glendive MT to 15 miles southwest of Rapid City SD. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU8). 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 500. Mean storm motion vector 27025. ...Thompson Click for Watch Status Reports

Hazard Tornadoes EF2+ Tornadoes Likelihood Low Very Low Severe Wind 65 kt+ Wind Moderate Low Severe Hail 2"+ Hail Moderate Moderate SEL8 URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 238 NWS Storm Prediction Center Norman OK 405 PM MDT Sun May 31 2020 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Parts of east central and southeast Montana Southwest North Dakota West central and northwest South Dakota Northeast Wyoming * Effective this Sunday afternoon and evening from 405 PM until 1000 PM MDT. * Primary threats include... Scattered large hail and isolated very large hail events to 2 inches in diameter possible Scattered damaging wind gusts to 70 mph possible SUMMARY...Scattered thunderstorm development is underway along and east of a surface trough, and the storms will encounter somewhat richer moisture to the east and should intensify some this evening. The storm environment is supportive of a mix of organized clusters and supercells, with the attendant threat for large hail and damaging winds. The severe thunderstorm watch area is approximately along and 60 statute miles east and west of a line from 15 miles east northeast of Glendive MT to 15 miles southwest of Rapid City SD. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU8). 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 500. Mean storm motion vector 27025. ...Thompson

Hazard Tornadoes EF2+ Tornadoes Likelihood Low Very Low Severe Wind 65 kt+ Wind Moderate Low Severe Hail 2"+ Hail Moderate Moderate

Note: The Aviation Watch (SAW) product is an approximation to the watch area. The actual watch is depicted by the shaded areas.

SAW8 WW 238 SEVERE TSTM MT ND SD WY 312205Z - 010400Z AXIS..60 STATUTE MILES EAST AND WEST OF LINE.. 15ENE GDV/GLENDIVE MT/ - 15SW RAP/RAPID CITY SD/ ..AVIATION COORDS.. 50NM E/W /68SSW ISN - 12WSW RAP/ HAIL SURFACE AND ALOFT..2 INCHES. WIND GUSTS..60 KNOTS. MAX TOPS TO 500. MEAN STORM MOTION VECTOR 27025. LAT...LON 47210323 43890206 43890447 47210578 THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS FOR WOU8. Watch 238 Status Report Messages: STATUS REPORT #5 ON WW 238 VALID 010340Z - 010400Z SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 50 SSW Y22 TO 20 WSW 2WX TO 35 NNE 2WX TO 35 S DIK. WW 238 WILL BE ALLOWED TO EXPIRE AT 010400Z. ..DIAL..06/01/20 ATTN...WFO...BYZ...GGW...BIS...UNR... && STATUS REPORT FOR WS 238 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS NDC001-041-010400- ND . NORTH DAKOTA COUNTIES INCLUDED ARE ADAMS HETTINGER $$ SDC063-105-010400- SD . SOUTH DAKOTA COUNTIES INCLUDED ARE HARDING PERKINS $$ 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. $$ STATUS REPORT #4 ON WW 238 VALID 010235Z - 010340Z SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 65 SSW Y22 TO 30 SW 2WX TO 20 NNE BHK TO 20 SW GDV TO 30 WNW GDV. ..DIAL..06/01/20 ATTN...WFO...BYZ...GGW...BIS...UNR... && STATUS REPORT FOR WS 238 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS MTC021-109-010340- MT . MONTANA COUNTIES INCLUDED ARE DAWSON WIBAUX $$ NDC001-007-011-033-041-087-010340- ND . NORTH DAKOTA COUNTIES INCLUDED ARE ADAMS BILLINGS BOWMAN GOLDEN VALLEY HETTINGER SLOPE $$ SDC063-105-010340- SD . SOUTH DAKOTA COUNTIES INCLUDED ARE HARDING PERKINS $$ 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. $$ STATUS REPORT #3 ON WW 238 VALID 010140Z - 010240Z SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 WSW RAP TO 55 NW RAP TO 40 ENE 4BQ TO 35 E MLS TO 25 NE MLS. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 777 ..DIAL..06/01/20 ATTN...WFO...BYZ...GGW...BIS...UNR... && STATUS REPORT FOR WS 238 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS MTC011-021-025-079-109-010240- MT . MONTANA COUNTIES INCLUDED ARE CARTER DAWSON FALLON PRAIRIE WIBAUX $$ NDC001-007-011-033-041-087-010240- ND . NORTH DAKOTA COUNTIES INCLUDED ARE ADAMS BILLINGS BOWMAN GOLDEN VALLEY HETTINGER SLOPE $$ SDC019-033-063-093-103-105-010240- SD . SOUTH DAKOTA COUNTIES INCLUDED ARE BUTTE CUSTER HARDING MEADE PENNINGTON PERKINS $$ 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. $$ STATUS REPORT #2 ON WW 238 VALID 010045Z - 010140Z THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA. ..DIAL..06/01/20 ATTN...WFO...BYZ...GGW...BIS...UNR... && STATUS REPORT FOR WS 238 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS MTC011-017-021-025-075-079-109-010140- MT . MONTANA COUNTIES INCLUDED ARE CARTER CUSTER DAWSON FALLON POWDER RIVER PRAIRIE WIBAUX $$ NDC001-007-011-033-041-087-010140- ND . NORTH DAKOTA COUNTIES INCLUDED ARE ADAMS BILLINGS BOWMAN GOLDEN VALLEY HETTINGER SLOPE $$ SDC019-033-063-081-093-103-105-010140- SD . SOUTH DAKOTA COUNTIES INCLUDED ARE BUTTE CUSTER HARDING LAWRENCE MEADE PENNINGTON PERKINS $$ WYC011-045-010140- WY . WYOMING COUNTIES INCLUDED ARE CROOK WESTON $$ THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES. $$ STATUS REPORT #1 ON WW 238 VALID 312335Z - 010040Z THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA. ..DIAL..05/31/20 ATTN...WFO...BYZ...GGW...BIS...UNR... && STATUS REPORT FOR WS 238 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS MTC011-017-021-025-075-079-109-010040- MT . MONTANA COUNTIES INCLUDED ARE CARTER CUSTER DAWSON FALLON POWDER RIVER PRAIRIE WIBAUX $$ NDC001-007-011-033-041-087-010040- ND . NORTH DAKOTA COUNTIES INCLUDED ARE ADAMS BILLINGS BOWMAN GOLDEN VALLEY HETTINGER SLOPE $$ SDC019-033-063-081-093-103-105-010040- SD . SOUTH DAKOTA COUNTIES INCLUDED ARE BUTTE CUSTER HARDING LAWRENCE MEADE PENNINGTON PERKINS $$ WYC011-045-010040- WY . WYOMING COUNTIES INCLUDED ARE CROOK WESTON $$ 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. $$