

415 

WWUS20 KWNS 071807

SEL2

SPC WW 071807

LAZ000-MSZ000-080100-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 262

NWS STORM PREDICTION CENTER NORMAN OK

110 PM CDT MON MAY 7 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       EASTERN LOUISIANA

       CENTRAL AND SOUTHERN MISSISSIPPI



EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 110 PM UNTIL 800

PM CDT.



HAIL TO 1.5 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 50

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 35 MILES WEST OF

NATCHEZ MISSISSIPPI TO 25 MILES SOUTHEAST OF MERIDIAN

MISSISSIPPI.  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...CONTINUE...WW 261...



DISCUSSION...GUST FRONT ASSOCIATED WITH SWD-MOVING MCS WILL CONTINUE

TO INTERACT WITH A MOIST AND MODERATELY UNSTABLE AIR MASS TO FOSTER

VIGOROUS UPDRAFT GROWTH ON THE LEADING EDGE OF SYSTEM COLD POOL.

THOUGH VERTICAL SHEAR WILL REMAIN WEAK...THE PRESENCE OF STEEP LOW

TO MIDLEVEL LAPSE RATES WILL SUPPORT VIGOROUS UP/DOWNDRAFTS CAPABLE

OF DAMAGING WINDS AND HAIL.



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

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

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

MOTION VECTOR 36025.





...MEAD

