052
WWUS20 KWNS 221658
SEL2
SPC WW 221658
LAZ000-MSZ000-CWZ000-230000-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 772
NWS STORM PREDICTION CENTER NORMAN OK
1200 PM CDT THU OCT 22 2009
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
MUCH OF EASTERN LOUISIANA
PARTS OF SOUTHWESTERN MISSISSIPPI
COASTAL WATERS
EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM NOON UNTIL 700
PM CDT.
TORNADOES...HAIL TO 0.5 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 65 STATUTE
MILES EAST AND WEST OF A LINE FROM 40 MILES NORTH NORTHEAST OF
MONROE LOUISIANA TO 35 MILES SOUTH OF INTRACOASTAL CITY
LOUISIANA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).
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...THIS TORNADO WATCH REPLACES TORNADO
WATCH NUMBER 771. WATCH NUMBER 771 WILL NOT BE IN EFFECT AFTER
NOON CDT.
DISCUSSION...VERY MOIST WARM SECTOR CONTINUES TO SPREAD NWD UP THE
LWR MS RIVER VALLEY AHEAD OF A COLD FRONT AND GRADUALLY DEEPENING
SURFACE LOW ALONG TX/LA BORDER. STRONG SHEAR PROFILES AND
SUFFICIENT INSTABILITY WILL CONTINUE TO SUPPORT SUPERCELLS AND
ISOLATED TORNADOES ALONG AND AHEAD OF N/S SQUALL LINE ACROSS WRN LA.
THREAT AREA WILL ALSO DEVELOP FURTHER N DURING THE AFTERNOON ALONG
WITH THE WARM SECTOR.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 19035.
...HALES
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