Tornado Watch 4

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 4
NWS STORM PREDICTION CENTER NORMAN OK
555 PM CST MON JAN 7 2008
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
NORTHERN AND WESTERN INDIANA
WESTERN AND SOUTHERN LOWER MICHIGAN
LAKE MICHIGAN
EFFECTIVE THIS MONDAY AFTERNOON AND TUESDAY MORNING FROM 555 PM
UNTIL 100 AM CST.
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 45 STATUTE
MILES EAST AND WEST OF A LINE FROM 55 MILES SOUTH OF VALPARAISO
INDIANA TO 55 MILES NORTH NORTHEAST OF GRAND RAPIDS MICHIGAN.
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 1
...
WW 2
...
WW 3
...
DISCUSSION...TSTMS IN NRN IL HAVE EVOLVED INTO LEWP-BEARING
MCS...WITH ONE LEWP CREST NOW NEAR CHI AND ANOTHER S OF MMO. GIVEN
EXISTING SFC-BASED INSTABILITY AND STRONG LOW TO MID LEVEL WSWLY
WIND FIELD...EXPECT THESE FEATURES WILL CONTINUE ENE AT APPROX. 50
KTS AND POSE A THREAT FOR DAMAGING WIND AND POSSIBLY BOW-APEX
TORNADOES. FARTHER N... STORMS CONTINUE TO FORM ATTM IN PLUME OF
SLIGHTLY ELEVATED INSTABILITY EXTENDING ENE FROM FAR NRN IL/SE WI.
GIVEN STRENGTH OF DOWNSTREAM WIND FIELD AND LIKELIHOOD THAT
LAKE-INDUCED STABILIZATION WILL BE LIMITED...A THREAT MAY DEVELOP
FOR ISOLATED DAMAGING WIND/HAIL AND/OR A TORNADO OVER PARTS OF
WRN/CNTRL LWR MI.
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 350.
MEAN STORM MOTION VECTOR 25050.
...CORFIDI