SEL7
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 57
NWS STORM PREDICTION CENTER NORMAN OK
740 PM CST THU MAR 9 2006
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
SOUTHEAST ILLINOIS
SOUTHERN INDIANA
CENTRAL KENTUCKY
NORTHERN MIDDLE TENNESSEE
EFFECTIVE THIS THURSDAY NIGHT FROM 740 PM UNTIL MIDNIGHT CST.
HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60
STATUTE MILES EAST AND WEST OF A LINE FROM 30 MILES EAST NORTHEAST
OF BLOOMINGTON INDIANA TO 70 MILES SOUTH SOUTHWEST OF CLARKSVILLE
TENNESSEE. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).
REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOES.
OTHER WATCH INFORMATION...CONTINUE...WW 53...WW 54...WW 55...WW
56...
DISCUSSION...VORT-INDUCED STORM CLUSTERS/BANDS EXPECTED TO CONTINUE
MOVING/DEVELOPING NEWD UP THE LWR OH VLY AS STRONG MID LVL
COOLING/FORCING FOR ASCENT OVERSPREAD LOW LVL MOIST CORRIDOR. 100
KT SPEED MAX AT 500 MB AND STEEP LOW TO MID LVL LAPSE RATES IN WAKE
OF STORMS SUGGEST CONTINUED THREAT FOR HIGH WIND...SOME HAIL AND
POSSIBLY AN ISOLATED TORNADO.
AVIATION...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 400. MEAN STORM MOTION
VECTOR 24050.
...CORFIDI
