

511 

WWUS20 KWNS 031919

SEL4

SPC WW 031919

ARZ000-LAZ000-MSZ000-040300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 134

NWS STORM PREDICTION CENTER NORMAN OK

220 PM CDT TUE APR 3 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHERN ARKANSAS

       NORTHERN LOUISIANA

       CENTRAL AND SOUTHERN MISSISSIPPI



EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 220 PM UNTIL

1000 PM CDT.



HAIL TO 1 INCH 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 65

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 25 MILES EAST

NORTHEAST OF JACKSON MISSISSIPPI TO 40 MILES NORTH NORTHWEST OF

NATCHITOCHES LOUISIANA.  FOR A COMPLETE DEPICTION OF THE WATCH

SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).



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 132...WW 133...



DISCUSSION...MCS EVOLVING OVER SRN AR INTO NWRN MS IS EXPECTED TO

INTENSIFY AS IT PROGRESSES SEWD INTO A STEEP LOW-LEVEL LAPSE RATE

ENVIRONMENT WHERE MLCAPE HAS INCREASED TO 1000-2000 J/KG.  AREA VAD

DATA FROM THE SERN TX/SWRN LA COASTAL AREAS INTO CNTRL LA INDICATE

THE PRESENCE OF A 20-30 KT SSWLY LLJ WHICH WILL ENHANCE INFLOW INTO

EVOLVING SYSTEM.  THE PRIMARY HAZARD WILL BE DAMAGING WINDS...THOUGH

SOME HAIL IS POSSIBLE.



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

TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS.

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

VECTOR 33030.





...MEAD

