Saturday, June 7, 2008

WATCHES: Tornado Watch Number 481

WWUS20 KWNS 072240
SEL1
SPC WW 072240
INZ000-MIZ000-LMZ000-080400-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 481
NWS STORM PREDICTION CENTER NORMAN OK
640 PM EDT SAT JUN 7 2008

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

PARTS OF NORTHERN INDIANA
PARTS OF SOUTHERN AND WESTERN LOWER MICHIGAN
LAKE MICHIGAN

EFFECTIVE THIS SATURDAY NIGHT FROM 640 PM UNTIL MIDNIGHT EDT.

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 55 STATUTE
MILES EAST AND WEST OF A LINE FROM 35 MILES NORTH OF GRAND RAPIDS
MICHIGAN TO 50 MILES SOUTHEAST OF VALPARAISO INDIANA. 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 478...WW 479...WW 480...

DISCUSSION...SEVERE THUNDERSTORMS INCLUDING TORNADIC SUPERCELLS OVER
NRN IL AND SRN WI MOVING E/NE. WHILE CONDITIONS ARE NOT QUITE AS
FAVORABLE E OF LM THERE IS STILL FAVORABLE DEEP LAYER SHEAR AND MDT
INSTABILITY...THUS THREAT OF SUPERCELLS INCLUDING TORNADOES IS
EXPECTED TO CONTINUE UNTIL AT LEAST SUNSET ACROSS WATCH AREA.

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
550. MEAN STORM MOTION VECTOR 24030.


...HALES

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