

000 

WWUS20 KWNS 311338

SEL9

SPC WW 311338

LAZ000-TXZ000-CWZ000-311900-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 99

NWS STORM PREDICTION CENTER NORMAN OK

840 AM CDT SAT MAR 31 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       MUCH OF SOUTHWESTERN AND CENTRAL LOUISIANA

       SMALL PART OF EASTERN TEXAS

       COASTAL WATERS



EFFECTIVE THIS SATURDAY MORNING AND AFTERNOON FROM 840 AM UNTIL

200 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 70

STATUTE MILES EAST AND WEST OF A LINE FROM 20 MILES WEST

NORTHWEST OF NATCHITOCHES LOUISIANA TO 50 MILES SOUTH SOUTHWEST

OF INTRACOASTAL CITY LOUISIANA.  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 98...



DISCUSSION...WELL ORGANIZED BOW MOVING EWD ACROSS SERN TX.  12Z

LCH/SHV SOUNDINGS SUPPORT A CONTINUED THREAT OF WIND DAMAGE

ASSOCIATED WITH THE BOW AS IT TRACKS EWD INTO LA.



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 24030.





...HALES

