WATCHES: Severe Thunderstorm Watch Number 738

WWUS20 KWNS 020055
SEL8
SPC WW 020055
ARZ000-LAZ000-TXZ000-CWZ000-020800-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 738
NWS STORM PREDICTION CENTER NORMAN OK
750 PM CDT MON NOV 1 2010

THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

SOUTHWEST ARKANSAS
NORTHWEST LOUISIANA
EASTERN AND SOUTHEASTERN TEXAS
COASTAL WATERS

EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 750 PM UNTIL
300 AM CDT.

HAIL TO 2 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 60
STATUTE MILES EITHER SIDE OF A LINE FROM 40 MILES EAST OF
TEXARKANA ARKANSAS TO 35 MILES WEST NORTHWEST OF ANGLETON TEXAS.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU8).

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.

DISCUSSION...TSTMS EXPECTED TO INCREASE IN COVERAGE AND INTENSITY
THROUGH EARLY TUE OVER PARTS OF ERN/SE TX AND WRN LA AS LOW LVL
WAA/MOISTURE INFLOW STRENGTHEN DOWNSTREAM FROM AMPLIFYING W TX UPR
TROUGH. WEAK MID LVL FLOW SHOULD GRADUALLY INCREASE AND BACK.
COUPLED WITH EXISTING LOW LVL FORCING MECHANISMS /MAINLY THE SSW-NNE
BOUNDARY FROM W OF KHGX TO NEAR KSHV/...SETUP SHOULD FAVOR BROKEN
LINE SEGMENTS/SMALL CLUSTERS OF MULTICELLS AND POSSIBLY MARGINAL
SUPERCELLS WITH SVR HAIL/LOCALLY DMGG WIND. LOCALLY ENHANCED LOW
LVL SPEED/DIRECTIONAL SHEAR NEAR MCS OUTFLOW BNDRY IN THE KHGX/KGLS
AREA...AND RICH MOISTURE...SUGGEST A NON-ZERO TORNADO THREAT ACROSS
THAT REGION. THIS THREAT...HOWEVER...APPEARS TOO LOW TO WARRANT A
SEPARATE TORNADO WATCH ATTM.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 21025.

...CORFIDI

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