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390 

WWUS20 KWNS 302054

SEL5

SPC WW 302054

MNZ000-NDZ000-310300-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 635

NWS STORM PREDICTION CENTER NORMAN OK

355 PM CDT MON AUG 30 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       PARTS OF NORTHWEST MINNESOTA

       MUCH OF EASTERN NORTH DAKOTA



EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 355 PM UNTIL

1000 PM CDT.



TORNADOES...HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 75 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 95 STATUTE

MILES EAST AND WEST OF A LINE FROM 30 MILES WEST NORTHWEST OF

ROSEAU MINNESOTA TO 75 MILES SOUTH SOUTHWEST OF JAMESTOWN NORTH

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

WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).



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 633...WW 634...



DISCUSSION...WITH SURFACE LOW TRACKING NEWD TOWARD ERN ND AND

FRONTAL BOUNDARY ACROSS THE WATCH...FAVORABLE SHEAR WILL BE

AVAILABLE FOR SUPERCELL DEVELOPMENT.  MDTLY UNSTABLE AIR MASS

BECOMING UNCAPPED S OF FRONTAL BOUNDARY...THUS EXPECT RAPID SEVERE

THUNDERSTORM DEVELOPMENT NEXT COUPLE HOURS.  IN ADDITION TO DAMAGING

WINDS/LARGE HAIL...TORNADOES WILL BE POSSIBLE WITH ANY SUPERCELL.



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

SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 65 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

600. MEAN STORM MOTION VECTOR 23035.





...HALES

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