

623 

WWUS20 KWNS 282259

SEL7

SPC WW 282259

MTZ000-290600-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 197

NWS STORM PREDICTION CENTER NORMAN OK

500 PM MDT WED MAY 28 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  NORTH CENTRAL AND NORTHEAST MONTANA



* EFFECTIVE THIS WEDNESDAY AFTERNOON FROM 500 PM UNTIL MIDNIGHT

  MDT.



* PRIMARY THREATS INCLUDE...

  WIDESPREAD LARGE HAIL LIKELY WITH ISOLATED VERY LARGE HAIL

    EVENTS TO 2.5 INCHES IN DIAMETER POSSIBLE

  SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  A TORNADO OR TWO POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 75

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 80 MILES SOUTHWEST

OF HAVRE MONTANA TO 20 MILES NORTH NORTHEAST OF SIDNEY MONTANA.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU7).



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 196...



DISCUSSION...ISOLATED THUNDERSTORMS DEVELOPING NEAR GREAT FALLS WILL

BUILD NORTHEASTWARD THIS EVENING...WHILE OTHER STORMS FORM IN THE

HIGH PLAINS OF NORTHEAST MT.  VERTICAL SHEAR PROFILES APPEAR

FAVORABLE FOR SUPERCELLS CAPABLE OF VERY LARGE HAIL AND DAMAGING

WINDS.  WHILE AN ISOLATED TORNADO OR TWO IS ALSO

POSSIBLE...RELATIVELY LARGE T/TD SPREADS AND HIGH LCL VALUES MAY

TEND TO LIMIT THAT THREAT THROUGH MUCH OF THE EVENING.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 23030.





...HART

