SEL4
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 4
NWS STORM PREDICTION CENTER NORMAN OK
455 PM CST WED JAN 12 2005
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
CENTRAL AND NORTHERN ILLINOIS
LAKE MICHIGAN
EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 455 PM UNTIL
1000 PM CST.
HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 55 STATUTE MILES
EAST AND WEST OF A LINE FROM 35 MILES SOUTHEAST OF QUINCY ILLINOIS
TO 25 MILES NORTHWEST OF MEIGS FIELD ILLINOIS.
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 2...WW 3...
DISCUSSION...LINE OF FAST MOVING THUNDERSTORMS OVER NORTHEAST MO
WILL TRACK NORTHEASTWARD ACROSS CENTRAL/NORTHERN IL THIS EVENING.
DESPITE WEAK INSTABILITY...VERY STRONG WIND FIELDS AND FORCING ALONG
FRONT MAY BE SUFFICIENT FOR A RISK OF ISOLATED DAMAGING WINDS AND
LARGE HAIL.
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 23045.
...HART
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