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URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 583

NWS STORM PREDICTION CENTER NORMAN OK

1005 PM MDT FRI AUG 6 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       EASTERN MONTANA

       WESTERN NORTH DAKOTA



EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 1005 PM

UNTIL 300 AM MDT.



HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 50

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 20 MILES SOUTHWEST

OF WOLF POINT MONTANA TO 50 MILES NORTH NORTHEAST OF DICKINSON

NORTH DAKOTA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).



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 582...



DISCUSSION...SUPERCELL NOW NEAR KOLF IN NE MT EXPECTED TO CONTINUE

GENERALLY ESE TO SEWD...WITH OTHER TSTMS /INCLUDING POSSIBLE

SUPERCELLS/ FORMING AHEAD OF IT ALONG NW/SE ORIENTED WARM FRONT INTO

WRN ND.  REGIONAL ASCENT/SHEAR WILL CONTINUE TO BE ENHANCED BY EWD

MOVING UPR IMPULSE...SUGGESTING CONTINUED THREAT FOR ISOLD SVR

STORMS DESPITE TIME OF DAY.



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 29035.





...CORFIDI

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