

252 

WWUS20 KWNS 252019

SEL4

SPC WW 252019

ARZ000-LAZ000-MSZ000-TXZ000-260400-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 374

NWS STORM PREDICTION CENTER NORMAN OK

320 PM CDT WED MAY 25 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHERN ARKANSAS

       NORTHERN LOUISIANA

       NORTHWEST MISSISSIPPI

       EASTERN TEXAS



EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 320 PM UNTIL

1100 PM CDT.



TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 85 STATUTE

MILES EAST AND WEST OF A LINE FROM 30 MILES NORTH OF MONTICELLO

ARKANSAS TO 5 MILES EAST SOUTHEAST OF LUFKIN TEXAS.  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.



OTHER WATCH INFORMATION...CONTINUE...WW 368...WW 369...WW

370...WW 371...WW 372...WW 373...



DISCUSSION...TSTM DEVELOPMENT IS EXPECTED WITHIN THE NEXT ONE TO TWO

HOURS ALONG COLD FRONT OVER SWRN AR/NERN TX AS WELL AS FARTHER E

WITHIN OPEN WARM SECTOR.  AIR MASS IS EXTREMELY UNSTABLE THIS

AFTERNOON OWING TO A HOT AND VERY MOIST BOUNDARY LAYER WITH MLCAPE

VALUES OF 3000-3500 J/KG.  WHEN COUPLED WITH 40-50 KT OF DEEP WLY

SHEAR...SETUP WILL FAVOR THE DEVELOPMENT OF SUPERCELLS CAPABLE OF

VERY LARGE HAIL.  A FEW TORNADOES WILL ALSO BE POSSIBLE OWING TO AN

ENHANCED BAND OF SWLY WINDS ASSOCIATED WITH THE SRN EXTENSION OF

LLJ.



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

SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE

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

600. MEAN STORM MOTION VECTOR 27030.





...MEAD

