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414 

WWUS20 KWNS 102253

SEL1

SPC WW 102253

MNZ000-110500-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 271

NWS STORM PREDICTION CENTER NORMAN OK

555 PM CDT TUE MAY 10 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       CENTRAL MINNESOTA



EFFECTIVE THIS TUESDAY AFTERNOON FROM 555 PM UNTIL MIDNIGHT CDT.



TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 45 STATUTE

MILES EAST AND WEST OF A LINE FROM 70 MILES NORTH NORTHEAST OF

BRAINERD MINNESOTA TO 25 MILES SOUTH SOUTHEAST OF SAINT CLOUD

MINNESOTA.  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 268...WW 269...WW 270...



DISCUSSION...ISOLATED THUNDERSTORMS HAVE BEEN INCREASING ALONG THE

SURFACE BOUNDARY OVER CENTRAL MN.  SOUTHERLY LOW LEVEL WINDS TO THE

EAST OF THE BOUNDARY WILL CONTINUE TO DESTABILIZE THE BOUNDARY

LAYER...LEADING TO A POTENTIAL FOR SURFACE-BASED STORMS THIS

EVENING.  LARGE HAIL AND DAMAGING WINDS ARE LIKELY THE MAIN THREATS.

 HOWEVER..STRONG LOW LEVEL VERTICAL SHEAR COULD RESULT IN A TORNADO

THREAT IF STORMS BECOME SURFACE-BASED.



AVIATION...TORNADOES AND 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 24020.





...HART

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