167
WWUS20 KWNS 021933
SEL4
SPC WW 021933
MTZ000-030200-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 644
NWS STORM PREDICTION CENTER NORMAN OK
135 PM MDT WED SEP 2 2026
THE NWS STORM PREDICTION CENTER HAS ISSUED A
* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
CENTRAL MONTANA
* EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 135 PM
UNTIL 800 PM MDT.
* PRIMARY THREATS INCLUDE...
SCATTERED DAMAGING WINDS LIKELY WITH ISOLATED SIGNIFICANT GUSTS
TO 80 MPH POSSIBLE
ISOLATED LARGE HAIL EVENTS TO 1 INCH IN DIAMETER POSSIBLE
SUMMARY...HIGH-BASED THUNDERSTORMS SHOULD CONTINUE TO INCREASE IN
COVERAGE AND INTENSITY THIS AFTERNOON AND EVENING WHILE POSING A
THREAT FOR MAINLY SCATTERED SEVERE/DAMAGING WINDS AS THEY MOVE
QUICKLY NORTH-NORTHEASTWARD. PEAK GUSTS MAY REACH UP TO 70-80 MPH ON
AN ISOLATED BASIS. OCCASIONAL HAIL MAY ALSO OCCUR WITH THE STRONGER
CORES.
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 100
STATUTE MILES EAST AND WEST OF A LINE FROM 50 MILES NORTHWEST OF
HAVRE MT TO 25 MILES SOUTHEAST OF HELENA MT. FOR A COMPLETE
DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE
(WOUS64 KWNS WOU4).
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 643...
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO
1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70 KNOTS. A FEW
CUMULONIMBI WITH MAXIMUM TOPS TO 400. MEAN STORM MOTION VECTOR
20040.
...GLEASON
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