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325 

WWUS20 KWNS 032353

SEL8

SPC WW 032353

NDZ000-040600-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 458

NWS STORM PREDICTION CENTER NORMAN OK

555 PM MDT TUE JUL 3 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       WESTERN AND CENTRAL NORTH DAKOTA



EFFECTIVE THIS TUESDAY AFTERNOON FROM 555 PM UNTIL MIDNIGHT MDT.



HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 75

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



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 105

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 50 MILES SOUTH

SOUTHWEST OF WILLISTON NORTH DAKOTA TO 70 MILES NORTHEAST OF

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

THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).



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 457...



DISCUSSION...GROWING MCS OVER ERN MT AND WW 457 SHOULD MOVE INTO

ND...CONTINUING ITS RISK OF DAMAGING GUSTS AND OCNL HAIL.

CONVECTIVE COVERAGE AND SVR POTENTIAL ARE MORE UNCERTAIN WITH SWD

EXTENT ACROSS WW AREA...HOWEVER PRESENCE OF GREATEST

MOISTURE/INSTABILITY AND WEAKEST MLCINH OVER THAT AREA INDICATE

BACKBUILDING POTENTIAL AS COMPLEX PROCEEDS EWD.



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

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 65

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM

MOTION VECTOR 27030.





...EDWARDS

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