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WWUS20 KWNS 272031

SEL2

SPC WW 272031

MNZ000-WIZ000-LSZ000-280400-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 542

NWS STORM PREDICTION CENTER NORMAN OK

330 PM CDT TUE JUL 27 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       LARGE PART OF NORTHERN AND CENTRAL MINNESOTA

       PARTS OF NORTHWESTERN WISCONSIN

       LAKE SUPERIOR



EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 330 PM UNTIL

1100 PM CDT.



TORNADOES...HAIL TO 2.5 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 60 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 15 MILES NORTH OF ORTONVILLE

MINNESOTA TO 50 MILES SOUTHEAST OF KENNEDY WISCONSIN.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU2).



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 541...



DISCUSSION...AIR MASS HAS BECOME VERY TO EXTREMELY UNSTABLE ACROSS

THE WATCH AS THE E/W WARM FRONT HAS SHIFTED NWD. WITH APPROACH OF

THE UPSTREAM TROUGH AND WIND MAX...THUNDERSTORMS EXPECTED TO DEVELOP

RAPIDLY VICINITY OF THE WARM FRONT AND MOVE EWD.  SUPERCELLS

INCLUDING POSSIBLE TORNADOES ARE LIKELY ALONG WITH POTENTIAL FOR

VERY STRONG DAMAGING WINDS. THERE IS THE POTENTIAL FOR A STRONG

TORNADO OR TWO BY THIS EVENING.



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

SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE

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

650. MEAN STORM MOTION VECTOR 26035.





...HALES

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