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URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 424

NWS STORM PREDICTION CENTER NORMAN OK

530 PM CDT FRI JUN 3 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       NORTHEAST MINNESOTA INCLUDING THE ARROWHEAD

       NORTHWEST WISCONSIN



EFFECTIVE THIS FRIDAY AFTERNOON FROM 530 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 60 STATUTE

MILES EAST AND WEST OF A LINE FROM 25 MILES NORTH OF ELY

MINNESOTA TO 40 MILES EAST SOUTHEAST OF BRAINERD MINNESOTA.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU4).



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 423...



DISCUSSION...TSTMS ARE DEVELOPING ALONG A COLD FRONT WITHIN A MOIST

AND MODERATELY UNSTABLE AIR MASS WHERE MLCAPE HAS INCREASED TO

1500-2500 J/KG.  THIS AREA OF INITIATION COINCIDES WITH THE SERN

EDGE OF 70-75 KT MIDLEVEL JET STREAK...RESULTING IN 45-50+ KT

DEEP...SWLY SHEAR.  AS SUCH...SETUP WILL FAVOR SUPERCELL EVOLUTION

WITH THE PRIMARY HAZARD BEING VERY LARGE HAIL.  A COUPLE OF

TORNADOES WILL BE POSSIBLE WITH ANY MATURE SUPERCELLS THAT CAN

FAVORABLY INTERACT WITH WELL-DEFINED LAKE BREEZE BOUNDARY.



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 25035.





...MEAD

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