270
WWUS20 KWNS 292026
SEL6
SPC WW 292026
MTZ000-WYZ000-300300-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 556
NWS STORM PREDICTION CENTER NORMAN OK
230 PM MDT TUE JUL 29 2025
THE NWS STORM PREDICTION CENTER HAS ISSUED A
* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
SOUTHERN MONTANA
CENTRAL AND NORTHERN WYOMING
* EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 230 PM UNTIL
900 PM MDT.
* PRIMARY THREATS INCLUDE...
SCATTERED DAMAGING WINDS AND ISOLATED SIGNIFICANT GUSTS TO 80
MPH POSSIBLE
SCATTERED LARGE HAIL AND ISOLATED VERY LARGE HAIL EVENTS TO 2.5
INCHES IN DIAMETER POSSIBLE
SUMMARY...SCATTERED THUNDERSTORMS ARE FORECAST TO DEVELOP AND
INTENSIFY THROUGH THE AFTERNOON AND PERSIST INTO THE EARLY TO MID
EVENING. A FEW SUPERCELLS MAY EVOLVE FROM THE STRONGER
THUNDERSTORMS DURING THE AFTERNOON. UPSCALE GROWTH INTO ONE OR TWO
SMALL CLUSTERS IS EXPECTED. LARGE TO VERY LARGE HAIL WILL
POTENTIALLY ACCOMPANY ANY SUPERCELL THAT DEVELOPS, AND SEVERE GUSTS
(60-80 MPH) ARE POSSIBLE WITH THE MORE INTENSE DOWNDRAFTS AND
OUTFLOW.
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 105
STATUTE MILES EAST AND WEST OF A LINE FROM 50 MILES EAST NORTHEAST
OF HARLOWTON MT TO 45 MILES EAST SOUTHEAST OF LANDER WY. FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU6).
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 70 KNOTS. A
FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR
24025.
...SMITH
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