WATCHES: Tornado Watch Number 424

WWUS20 KWNS 032231
SEL4
SPC WW 032231
MNZ000-WIZ000-040500-

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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