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994 

WWUS20 KWNS 180025

SEL6

SPC WW 180025

MNZ000-180700-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 496

NWS STORM PREDICTION CENTER NORMAN OK

720 PM CDT FRI JUN 17 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       PARTS OF WESTERN AND SOUTH CENTRAL MINNESOTA



EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 720 PM

UNTIL 200 AM CDT.



TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS

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



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 40 STATUTE

MILES EAST AND WEST OF A LINE FROM 15 MILES NORTHWEST OF

ALEXANDRIA MINNESOTA TO REDWOOD FALLS MINNESOTA.  FOR A COMPLETE

DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE

(WOUS64 KWNS WOU6).



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 492...WW 493...WW

494...WW 495...



DISCUSSION...TSTMS EXPECTED TO PERSIST THROUGH LATE EVE INVOF WEAK

WNW-ESE WARM FRONT LOCATED NEAR/A LITTLE N OF THE MN RVR.  OTHER

STORMS MAY MOVE INTO WRN PART OF WW AS FRONTAL CONVECTION MOVES

ENEWD. MODERATE LOW LVL DIRECTIONAL SHEAR...INCREASING LARGE SCALE

ASCENT WITH APPROACH OF ND SHORTWAVE IMPULSE...AND MOIST LOW TO MID

LVL ENVIRONMENT MAY SUPPORT A FEW WEAK SUPERCELLS WITH SUFFICIENT

LOW LVL ROTATION TO YIELD TORNADOES AND PERHAPS LOCALLY DMGG

WIND/MARGINALLY SVR HAIL.



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

SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND

GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.

MEAN STORM MOTION VECTOR 25020.





...CORFIDI

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