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WWUS20 KWNS 231647

SEL1

SPC WW 231647

ILZ000-INZ000-KYZ000-MOZ000-240000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 101

NWS STORM PREDICTION CENTER NORMAN OK

1145 AM CDT FRI MAR 23 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       CENTRAL AND SOUTHERN ILLINOIS

       SOUTHWEST INDIANA

       WESTERN KENTUCKY

       EXTREME SOUTHEAST MISSOURI



EFFECTIVE THIS FRIDAY MORNING AND EVENING FROM 1145 AM UNTIL 700

PM CDT.



HAIL TO 2 INCHES 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 65

STATUTE MILES EAST AND WEST OF A LINE FROM 20 MILES EAST

NORTHEAST OF MATTOON ILLINOIS TO 35 MILES SOUTH SOUTHEAST OF

PADUCAH KENTUCKY.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).



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.



DISCUSSION...SEVERAL BANDS OF THUNDERSTORMS HAVE INTENSIFIED THIS

MORNING FROM EXTREME SERN MO INTO WRN KY AND SRN IL...IN ADVANCE OF

AN EWD MOVING UPPER LOW OVER MO.  ZONES OF CLEAR SKIES WILL PERMIT

STRONGER HEATING/DESTABILIZATION AHEAD OF THE KY/SRN IL STORMS...AND

STRONG DYNAMIC FORCING FOR LARGE SCALE ASCENT WILL ENHANCE SEVERE

STORM POTENTIAL THROUGH THE AFTERNOON HOURS.  LARGE HAIL AND

OCCASIONAL STRONG WIND GUSTS WILL BE PRODUCED BY STRONGER

CELLS...ALTHOUGH AN ISOLATED BRIEF TORNADO MAY ALSO BE POSSIBLE WITH

ANY PERSISTENT SUPERCELL THAT FORMS.



AVIATION...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 20025.





...WEISS

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