

000 

WWUS20 KWNS 170530

SEL0

SPC WW 170530

ARZ000-LAZ000-MSZ000-CWZ000-171100-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 60

NWS STORM PREDICTION CENTER NORMAN OK

1130 PM CST SAT FEB 16 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHEAST ARKANSAS

       EASTERN LOUISIANA

       WESTERN MISSISSIPPI

       COASTAL WATERS



EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 1130 PM

UNTIL 500 AM CST.



HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80

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



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70

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

NORTHEAST OF GREENVILLE MISSISSIPPI TO 50 MILES SOUTH SOUTHEAST

OF INTRACOASTAL CITY LOUISIANA.  FOR A COMPLETE DEPICTION OF THE

WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).



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 59...



DISCUSSION...LINE OF THUNDERSTORMS IS INTENSIFYING AS IT MOVES

ACROSS LA.  THESE STORMS ARE ASSOCIATED WITH AN EXTREMELY STRONG MID

LEVEL SHORTWAVE TROUGH WHICH WILL EJECT ACROSS WATCH AREA OVERNIGHT.

 STRONG WIND FIELDS AT ALL LEVELS WILL MAINTAIN A RISK OF LOCALLY

DAMAGING WINDS WITH BOW/LEWP STRUCTURES...DESPITE RATHER WEAK

INSTABILITY.



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

TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70 KNOTS.

A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 400. MEAN STORM MOTION

VECTOR 24045.





...HART

