

265 

WWUS20 KWNS 271958

SEL2

SPC WW 271958

ARZ000-LAZ000-TXZ000-280200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 202

NWS STORM PREDICTION CENTER NORMAN OK

300 PM CDT MON APR 27 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       MUCH OF CENTRAL AND  SOUTHERN ARKANSAS

       A LARGE PART OF NORTHERN LOUISIANA

       SMALL PART OF NORTHEAST TEXAS



EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 300 PM UNTIL 900

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 80

STATUTE MILES EAST AND WEST OF A LINE FROM 15 MILES NORTHWEST OF

LITTLE ROCK ARKANSAS TO 25 MILES SOUTH SOUTHWEST OF NATCHITOCHES

LOUISIANA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).



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...THIS SEVERE THUNDERSTORM WATCH REPLACES

SEVERE THUNDERSTORM WATCH NUMBER 200. WATCH NUMBER 200 WILL NOT

BE IN EFFECT AFTER 300 PM CDT. CONTINUE...WW 201...



DISCUSSION...STRONG HEATING ACROSS WATCH AREA HAS OCCURRED AHEAD OF

OLD OUTFLOW BOUNDARY NERN TX.  WITH 30-40KT OF SHEAR COUPLED WITH

MLCAPES TO 2000 J/KG...PRIMARILY MULTICELLULAR THUNDERSTORMS WILL

INCREASE IN NUMBER AND INTENSITY THRU THE AFTERNOON.  PRIMARY THREAT

WILL BE LARGE HAIL AND LOCAL DAMAGING WINDS...PARTICULARLY IN STORMS

THAT FORM INTO SHORT LINE SEGMENTS.



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 22030.





...HALES

