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WWUS20 KWNS 201957

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ARZ000-210300-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 93

NWS STORM PREDICTION CENTER NORMAN OK

255 PM CDT TUE MAR 20 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       CENTRAL AND EASTERN ARKANSAS



EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 255 PM UNTIL

1000 PM CDT.



TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS

TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 55 STATUTE

MILES EAST AND WEST OF A LINE FROM 75 MILES NORTH NORTHEAST OF

LITTLE ROCK ARKANSAS TO 45 MILES SOUTH SOUTHWEST OF MONTICELLO

ARKANSAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).



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 92...



DISCUSSION...COMPOSITE OUTFLOW BOUNDARY CURRENTLY ROUGHLY BISECTING

AR WILL SERVE AS A FOCUS FOR INCREASING TSTM DEVELOPMENT THROUGH

LATE AFTERNOON/EARLY EVENING AS IT SLOWLY PROGRESSES EASTWARD...WITH

OTHER TSTMS POSSIBLE IN THE ADJACENT WARM SECTOR. A RELATIVELY

WARM/MOIST BOUNDARY LAYER IN CONJUNCTION WITH STRONG/DEEP SOUTHERLY

FLOW MAY YIELD STRONGER/SEVERE UPDRAFTS WITH THE QLCS...INCLUDING

EMBEDDED BOWING STRUCTURES AND A FEW SUPERCELLS. ISOLATED DAMAGING

WINDS AND A COUPLE OF TORNADOES MAY BE POSSIBLE IN ADDITION TO HEAVY

RAINFALL.



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

SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND

GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.

MEAN STORM MOTION VECTOR 21045.





...GUYER/THOMPSON

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