266
WWUS20 KWNS 262226
SEL0
SPC WW 262226
MTZ000-SDZ000-WYZ000-270600-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 400
NWS STORM PREDICTION CENTER NORMAN OK
430 PM MDT FRI JUN 26 2026
THE NWS STORM PREDICTION CENTER HAS ISSUED A
* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
CENTRAL AND EASTERN MONTANA
WESTERN SOUTH DAKOTA
NORTHEAST WYOMING
* EFFECTIVE THIS FRIDAY AFTERNOON FROM 430 PM UNTIL MIDNIGHT MDT.
* PRIMARY THREATS INCLUDE...
SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE
SCATTERED LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE
SUMMARY...THUNDERSTORMS COVERAGE IS EXPECTED TO INCREASE THIS
AFTERNOON AND EVENING AS A SHORTWAVE TROUGH MOVES INTO THE REGION.
ENVIRONMENTAL CONDITIONS SUPPORT THE POTENTIAL FOR STRONG TO SEVERE
STORMS, WITH BOWING SEGMENTS CAPABLE OF STRONG GUSTS AS THE PRIMARY
RISK. A FEW INSTANCES OF LARGE HAIL ARE POSSIBLE AS WELL,
PARTICULARLY ACROSS CENTRAL MONTANA.
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 80
STATUTE MILES EAST AND WEST OF A LINE FROM 55 MILES EAST NORTHEAST
OF LEWISTOWN MT TO 80 MILES SOUTHEAST OF GILLETTE WY. FOR A COMPLETE
DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE
(WOUS64 KWNS WOU0).
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 397...WW 398...WW 399...
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
24035.
...MOSIER
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