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URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 611

NWS STORM PREDICTION CENTER NORMAN OK

230 PM CDT FRI JUL 8 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       WESTERN AND CENTRAL NORTH DAKOTA



EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 230 PM UNTIL

1000 PM CDT.



TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 105 STATUTE

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

MINOT NORTH DAKOTA TO 70 MILES SOUTHEAST OF DICKINSON NORTH

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

WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).



REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR

TORNADOES AND 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.



OTHER WATCH INFORMATION...CONTINUE...WW 610...



DISCUSSION...THUNDERSTORMS OVER EXTREME ERN MT ARE EXPECTED TO

DEVELOP EWD AND INTENSIFY FURTHER THIS AFTERNOON AS A SHORT WAVE

TROUGH MOVES EWD ACROSS THE AREA.  AIR MASS IS CONTINUING TO WARM

AND DESTABILIZE WITH MLCAPE OF 1500-2000 J/KG EXPECTED THIS

AFTERNOON.  VAD PROFILES EXHIBIT CLOCKWISE TURNING HODOGRAPHS AND

CONSIDERABLE LOWER LEVEL SHEAR/HELICITY SUGGESTING THREAT FOR

SUPERCELLS AND A FEW TORNADOES...LARGE HAIL AND DAMAGING WINDS.  THE

WIND THREAT MAY INCREASE BY EVENING AS THERE IS POTENTIAL FOR STORMS

TO GROW UPSCALE INTO A FORWARD PROPAGATING MCS.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

500. MEAN STORM MOTION VECTOR 24030.





...WEISS

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