

534 

WWUS20 KWNS 222042

SEL4

SPC WW 222042

ARZ000-LAZ000-MSZ000-230200-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 744

NWS STORM PREDICTION CENTER NORMAN OK

240 PM CST SAT DEC 22 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHEAST ARKANSAS

       EASTERN LOUISIANA

       WESTERN MISSISSIPPI



EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 240 PM UNTIL

800 PM CST.



TORNADOES...HAIL TO 0.5 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 60 STATUTE

MILES EAST AND WEST OF A LINE FROM 25 MILES NORTHWEST OF

GREENWOOD MISSISSIPPI TO 35 MILES WEST OF BATON ROUGE LOUISIANA.

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.



DISCUSSION...SCTD SLIGHTLY ELEVATED STORMS THAT FORMED EARLIER TODAY

ALONG WIND SHIFT LINE/SHALLOW COLD FRONT OVER THE SABINE RVR VLY

HAVE PROGRESSED ENE INTO AREA THAT EXPERIENCED MODEST SFC HEATING

ALONG THE LS/MS BORDER THIS AFTN.  WHILE STORMS MAY REMAIN VERY

SLIGHTLY ELEVATED...GIVEN STRENGTH OF WIND FIELD AND LOW-LVL

DIRECTIONAL SHEAR...POTENTIAL WILL EXIST FOR EMBEDDED AREAS OF

LOW-LVL STORM ROTATION.  THESE MAY POSE A THREAT FOR ISOLATED

TORNADOES/LOCALLY DAMAGING WIND BEFORE THE STORMS MOVE E BEYOND

NARROW AXIS OF INSTABILITY.



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

450. MEAN STORM MOTION VECTOR 23045.





...CORFIDI

