

000 

WWUS20 KWNS 272256

SEL9

SPC WW 272256

ARZ000-LAZ000-MSZ000-280300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 79

NWS STORM PREDICTION CENTER NORMAN OK

600 PM CDT TUE MAR 27 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHEAST ARKANSAS

       NORTHEAST LOUISIANA

       WEST CENTRAL MISSISSIPPI



EFFECTIVE THIS TUESDAY EVENING FROM 600 PM UNTIL 1000 PM CDT.



HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70

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



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 40

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

MONTICELLO ARKANSAS TO 60 MILES SOUTH SOUTHWEST OF GREENVILLE

MISSISSIPPI.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).



REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE

FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY

DO PRODUCE TORNADOES.



OTHER WATCH INFORMATION...CONTINUE...WW 78...



DISCUSSION...CLUSTER OF STRONG/SEVERE THUNDERSTORMS OVER NORTHERN LA

IS EXPECTED TO PERSIST A FEW MORE HOURS AND SPREAD INTO SOUTHEAST AR

AND WESTERN MS.  WEAKENING LOW LEVEL VERTICAL SHEAR PROFILES SUGGEST

THAT LARGE HAIL AND DAMAGING WINDS WILL BE THE MAIN THREATS IN THIS

AREA.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM

MOTION VECTOR 24025.





...HART

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