555
WWUS20 KWNS 222136
SEL3
SPC WW 222136
LAZ000-MSZ000-CWZ000-230300-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 773
NWS STORM PREDICTION CENTER NORMAN OK
435 PM CDT THU OCT 22 2009
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
SOUTHEAST LOUISIANA
SOUTHERN MISSISSIPPI
COASTAL WATERS
EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 435 PM UNTIL
1000 PM CDT.
TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 75 STATUTE
MILES EAST AND WEST OF A LINE FROM 45 MILES NORTH NORTHEAST OF
SLIDELL LOUISIANA TO 50 MILES SOUTHWEST OF BOOTHVILLE LOUISIANA.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU3).
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 772...
DISCUSSION...LINE OF STRONG THUNDERSTORMS CONTINUES TO TRACK
EASTWARD ACROSS SOUTHERN LA...AND WILL BEGIN TO AFFECT SOUTHERN MS
THIS EVENING. LOW LEVEL VERTICAL SHEAR REMAINS FAVORABLE FOR A FEW
SUPERCELLS EMBEDDED IN...OR OUT AHEAD OF THE MAIN LINE. VERY MOIST
BOUNDARY LAYER AND MLCAPE VALUES AROUND 500 J/KG MAY BE SUFFICIENT
FOR A FEW TORNADOES THIS EVENING.
AVIATION...TORNADOES AND 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 450.
MEAN STORM MOTION VECTOR 24035.
...HART
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