WATCHES: Tornado Watch Number 71

WWUS20 KWNS 111700
SEL1
SPC WW 111700
LAZ000-TXZ000-CWZ000-120000-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 71
NWS STORM PREDICTION CENTER NORMAN OK
1155 AM CDT SUN MAR 11 2012

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

SOUTHWEST AND NORTHERN LOUISIANA
EAST TEXAS
COASTAL WATERS

EFFECTIVE THIS SUNDAY MORNING AND EVENING FROM 1155 AM UNTIL 700
PM CDT.

TORNADOES...HAIL TO 1.5 INCHES 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
SHREVEPORT LOUISIANA TO 25 MILES SOUTH OF PORT ARTHUR TEXAS. FOR
A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU1).

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.

DISCUSSION...STORMS ARE GRADUALLY INCREASING IN INTENSITY OVER SERN
TX AS THE SRN END OF A SHORT WAVE TROUGH ROTATES NEWD ACROSS CENTRAL
TX. STRONG SOUTHERLY LOW LEVEL WINDS ARE TRANSPORTING MOISTURE NWD
TOWARD THE ARKLATEX REGION...WITH SUBSEQUENT DESTABILIZATION
EXPECTED THROUGH THE AFTERNOON. LATEST KHGX VWP INDICATES STRONG
LOW- AND DEEP LAYER SHEAR ASSOCIATED WITH A CLOCKWISE TURNING
HODOGRAPH FAVORABLE FOR SUPERCELLS AND A THREAT FOR A FEW TORNADOES
TO DEVELOP. ACTIVITY WILL DEVELOP NEWD WITH ADDITIONAL RISK FOR
DAMAGING WIND GUSTS WITHIN SMALL-SCALE BOWING LINE SEGMENTS.

AVIATION...TORNADOES AND 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
450. MEAN STORM MOTION VECTOR 23035.

...WEISS

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