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191 

WWUS20 KWNS 312157

SEL3

SPC WW 312157

ARZ000-LAZ000-MSZ000-010500-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 773

NWS STORM PREDICTION CENTER NORMAN OK

400 PM CST FRI DEC 31 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       EASTERN ARKANSAS

       NORTHEAST LOUISIANA

       MISSISSIPPI



EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 400 PM UNTIL

1100 PM CST.



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 80 STATUTE

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

NATCHEZ MISSISSIPPI TO 40 MILES NORTH NORTHEAST OF OXFORD

MISSISSIPPI.  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 769...WW 770...WW

771...WW 772...



DISCUSSION...TSTMS SHOULD CONTINUE TO INCREASE IN COVERAGE AND

INTENSITY THIS EVENING AND TONIGHT ACROSS MUCH OF MS AS PACIFIC

FRONT INTERACTS WITH A MOISTENING ENVIRONMENT.  SSWLY LLJ IS

FORECAST TO PERSIST ACROSS THE REGION OVERNIGHT RESULTING IN MORE

THAN SUFFICIENT LOW AND DEEP-LAYER SHEAR TO SUPPORT EMBEDDED

SUPERCELLS CAPABLE OF TORNADOES AND DAMAGING WINDS.



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 23035.





...MEAD

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