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459 

WWUS20 KWNS 222250

SEL6

SPC WW 222250

ILZ000-MOZ000-230600-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 746

NWS STORM PREDICTION CENTER NORMAN OK

450 PM CST MON NOV 22 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       CENTRAL ILLINOIS

       SOUTHERN THROUGH EAST CENTRAL MISSOURI



EFFECTIVE THIS MONDAY AFTERNOON FROM 450 PM UNTIL MIDNIGHT CST.



TORNADOES...HAIL TO 1.5 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 70 STATUTE

MILES EAST AND WEST OF A LINE FROM 30 MILES NORTH OF CHAMPAIGN

ILLINOIS TO 50 MILES SOUTH SOUTHEAST OF SPRINGFIELD MISSOURI.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU6).



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 744...WW 745...



DISCUSSION...TSTMS EXPECTED TO INCREASE IN COVERAGE AND POSSIBLY

STRENGTH ALONG AND JUST AHEAD OF INTENSIFYING COLD FRONT MOVING ESE

FROM CNTRL/SW MO.  FRONTAL UPLIFT AND LARGER SCALE UVV MAY BE

ENHANCED WITH TIME AS SECOND IMPULSE ASSOCIATED WITH BROADER

SHORTWAVE TROUGH CROSSING THE CNTRL PLNS CONTINUES EWD AND GLANCES

FRONTAL ZONE.  VERY STRONG DEEP WIND FIELD...SEASONABLY MOIST

BOUNDARY LAYER INFLOW...AND RELATIVELY STEEP LOW LVL LAPSE RATES

SUGGEST POTENTIAL FOR A FEW SEMI-DISCRETE SUPERCELLS POSING A THREAT

FOR TORNADOES...IN ADDITION TO SVR HAIL/WIND.



AVIATION...TORNADOES AND 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

450. MEAN STORM MOTION VECTOR 25050.





...CORFIDI

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