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WWUS20 KWNS 260919

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ARZ000-ILZ000-INZ000-KYZ000-MOZ000-MSZ000-TNZ000-261700-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 721

NWS STORM PREDICTION CENTER NORMAN OK

405 AM CDT TUE OCT 26 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHWEST THROUGH NORTHEASTERN ARKANSAS

       SOUTHERN ILLINOIS

       SOUTHWEST INDIANA

       WESTERN KENTUCKY

       SOUTHEASTERN MISSOURI

       NORTHERN MISSISSIPPI

       WESTERN AND MIDDLE TENNESSEE



EFFECTIVE THIS TUESDAY MORNING FROM 405 AM UNTIL NOON CDT.



TORNADOES...HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 115 STATUTE

MILES EAST AND WEST OF A LINE FROM 40 MILES EAST NORTHEAST OF

MOUNT VERNON ILLINOIS TO 30 MILES SOUTH SOUTHEAST OF PINE BLUFF

ARKANSAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).



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 719...WW 720...



DISCUSSION...TSTMS EXPECTED TO SLOWLY INCREASE ALONG AR/SRN MO COLD

FRONT THROUGH LATER THIS MORNING AS FRONT CONTINUES ESE INTO WRN

PARTS OF KY/TN AND NW MS.  DEEP FORCING FOR ASCENT WILL BE WEAKER

COMPARED TO AREAS FARTHER N.  BUT COMBINATION OF LOW LVL FORCED

UPLIFT ALONG FRONT AND INCREASINGLY RICH MOISTURE /PW 1.25-1.50

INCHES/ SUGGESTS AN INCREASING LIKELIHOOD THAT EXISTING CINH WILL BE

OVERCOME AS POWERFUL NRN MO/IA UPR TROUGH GLANCES WATCH AREA.  THIS

SHOULD LEAD TO A BROKEN BAND OR TWO OF STORMS LATER THIS MORNING

FROM SE MO AND THE AR/MS DELTA REGION INTO WRN TN/WRN KY.  GIVEN

SUSTAINED UPDRAFTS...WIND FIELD WILL BE FAVORABLE FOR SUPERCELLS

POSING A RISK FOR BOTH TORNADOES AND SMALL BOWS WITH DMGG WIND.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

450. MEAN STORM MOTION VECTOR 24050.





...CORFIDI

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