

000 

WWUS20 KWNS 271751

SEL9

SPC WW 271751

ARZ000-LAZ000-TXZ000-280000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 379

NWS STORM PREDICTION CENTER NORMAN OK

1255 PM CDT TUE MAY 27 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       PARTS OF SOUTHERN ARKANSAS

       PARTS OF NORTHERN AND WESTERN LOUISIANA

       PARTS OF EAST TEXAS



EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 1255 PM UNTIL

700 PM CDT.



HAIL TO 2 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 85

STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES NORTHWEST OF

MONTICELLO ARKANSAS TO 40 MILES WEST OF LUFKIN TEXAS.  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 378...



DISCUSSION...THUNDERSTORMS ARE INTENSIFYING ON LEAD EDGE OF MCS THAT

HAS BEEN MOVING SEWD ACROSS NRN TX.  WITH MLCAPES AOA 2000 J/KG AND

STEEP MID LEVEL LAPSE RATES...POTENTIAL WILL INCREASE FOR BOTH HAIL

AND DAMAGING WINDS AS MCS CONTINUES TO PROPAGATE E/SEWD.



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

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 30025.





...HALES

