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710 

WWUS20 KWNS 212322

SEL4

SPC WW 212322

LAZ000-MSZ000-220600-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 584

NWS STORM PREDICTION CENTER NORMAN OK

525 PM CST SAT DEC 21 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* TORNADO WATCH FOR PORTIONS OF

  CENTRAL AND SOUTHEAST LOUISIANA

  WESTERN AND CENTRAL MISSISSIPPI



* EFFECTIVE THIS SATURDAY AFTERNOON FROM 525 PM UNTIL MIDNIGHT

  CST.



* PRIMARY THREATS INCLUDE...

  SEVERAL TORNADOES LIKELY WITH A FEW INTENSE TORNADOES POSSIBLE

  SEVERAL DAMAGING WIND GUSTS TO 70 MPH LIKELY



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 75 STATUTE

MILES EAST AND WEST OF A LINE FROM 35 MILES EAST NORTHEAST OF

GREENWOOD MISSISSIPPI TO 5 MILES SOUTH OF LAFAYETTE LOUISIANA.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU4).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



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 580. WATCH NUMBER 580 WILL NOT BE IN EFFECT AFTER

525 PM CST. CONTINUE...WW 582...WW 583...



DISCUSSION...EXTENSIVE QLCS WILL CONTINUE TO MOVE EWD

OVERNIGHT...WITH EMBEDDED CELLS MOVING RAPIDLY TO THE NE.  A

CONTINUATION OF THE MOIST AND MODESTLY UNSTABLE ENVIRONMENT...WITH

STRONG VERTICAL WIND SHEAR...WILL SUPPORT DAMAGING WINDS AND A FEW

TORNADOES WITH CIRCULATIONS EMBEDDED WITHIN THE LARGER CONVECTIVE

LINE.



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

SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE

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

500. MEAN STORM MOTION VECTOR 24045.





...THOMPSON

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