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WWUS20 KWNS 241635

SEL4

SPC WW 241635

ARZ000-ILZ000-KYZ000-MOZ000-MSZ000-TNZ000-250100-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 94

NWS STORM PREDICTION CENTER NORMAN OK

1130 AM CDT SAT APR 24 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       NORTHEAST ARKANSAS

       SOUTHERN ILLINOIS

       PARTS OF WESTERN KENTUCKY

       PARTS OF SOUTHEAST MISSOURI

       MUCH OF MISSISSIPPI

       WESTERN TENNESSEE



EFFECTIVE THIS SATURDAY MORNING AND EVENING FROM 1130 AM UNTIL

800 PM CDT.



...THIS IS A PARTICULARLY DANGEROUS SITUATION...



DESTRUCTIVE TORNADOES...LARGE HAIL TO 3 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 85 STATUTE

MILES EAST AND WEST OF A LINE FROM 20 MILES NORTH NORTHEAST OF

FARMINGTON MISSOURI TO 10 MILES WEST OF PINE BELT MISSISSIPPI.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU4).



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...THIS TORNADO WATCH REPLACES TORNADO

WATCH NUMBER 91. WATCH NUMBER 91 WILL NOT BE IN EFFECT AFTER 1130

AM CDT. CONTINUE...WW 92...WW 93...



DISCUSSION...RAPID DEEPENING PROCESS OF SURFACE LOW OVER AR AS

INTENSE S/WV TROUGH ROTATES ACROSS AREA.  TORNADIC SUPERCELLS

ALREADY UNDERWAY ACROSS MS AND WITH VERY STRONG WIND SHEAR PROFILES

IN PLACE CONDITIONS WILL CONTINUE AND SPREAD N AND E.  IN ADDITION A

RAPIDLY MOVING SQUALL LINE MOVING ACROSS NRN AR EXPECTED TO EVOLVE

INTO A SEVERE QLCS WITH VERY STRONG/DAMAGING WINDS.  EMBEDDED

TORNADIC SUPERCELLS ARE ALSO LIKELY WITH THIS FEATURE AS IT TRACKS

ACROSS MID MS VALLEY THIS AFTERNOON. DAMAGING LONG TRACK TORNADOES

ARE STILL POSSIBLE ACROSS THE WATCH.



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

SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE

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

550. MEAN STORM MOTION VECTOR 24050.





...HALES

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