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URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 595

NWS STORM PREDICTION CENTER NORMAN OK

415 PM MDT MON AUG 9 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       WESTERN AND NORTHERN NORTH DAKOTA



EFFECTIVE THIS MONDAY AFTERNOON FROM 415 PM UNTIL MIDNIGHT 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 45

STATUTE MILES EAST AND WEST OF A LINE FROM 55 MILES NORTH

NORTHWEST OF MINOT NORTH DAKOTA TO 60 MILES SOUTH SOUTHWEST OF

DICKINSON NORTH DAKOTA.  FOR A COMPLETE DEPICTION OF THE WATCH

SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).



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.



DISCUSSION...TSTMS...INCLUDING POSSIBLE SUPERCELLS...EXPECTED TO

INCREASE OVER WRN ND THIS EVE...ALONG AND NEAR SW-NE FRONT.  FRONT

SHOULD BEGIN DRIFTING NW LATER THIS EVE IN RESPONSE TO PRESSURE

FALLS/ASCENT SPREADING NNE INTO ERN MT AHEAD OF ID/UT UPR IMPULSE.

STEEP LOW LVL LAPSE RATES...INCREASING LOW LVL MOISTURE...AND

PRESENCE OF SUFFICIENT DEEP SHEAR SUGGEST LIKELIHOOD FOR SUSTAINED

STORMS/ SUPERCELLS WITH A RISK FOR SVR HAIL/LOCALLY DMGG WIND...AND

POSSIBLY A TORNADO.  ADDITIONAL STORMS MAY MOVE INTO PARTS OF ND

LATER TONIGHT AHEAD OF ID/UT UPR IMPULSE.



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 22030.





...CORFIDI

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