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WWUS20 KWNS 311824

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SPC WW 311824

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URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 73

NWS STORM PREDICTION CENTER NORMAN OK

120 PM CDT SUN MAR 31 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       CENTRAL AND SOUTH CENTRAL TEXAS



EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 120 PM UNTIL

1000 PM CDT.



HAIL TO 3 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 NORTH AND SOUTH OF A LINE FROM 15 MILES NORTHEAST

OF HUNTSVILLE TEXAS TO 55 MILES WEST NORTHWEST OF DEL RIO TEXAS.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU3).



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 72...



DISCUSSION...TSTMS EXPECTED TO INCREASE IN COVERAGE AND STRENGTH

ALONG AND S OF W-E BOUNDARY PROGRESSING SLOWLY SWD THROUGH CNTRL TX.

ACTIVITY WILL BE PROMOTED BY STRONG SFC HEATING...BRANCH OF

MOIST/SLY LLJ OVER DEEP S TX...AND ASCENT ASSOCIATED WITH SRN BRANCH

UPR IMPULSE NOW PASSING THE TX BIG BEND. COUPLED WITH DEEP EML AND

MODERATE WNWLY MID-LVL FLOW...INITIAL SETUP MAY SUPPORT SUSTAINED

STORMS AND SUPERCELLS/STORM SPLITS WITH LARGE HAIL/HIGH WIND. SHEAR

AND BOUNDARY STRENGTH/ORIENTATION SUGGEST EVENTUAL DEVELOPMENT OF AN

MCS OR TWO...WITH EMBEDDED FORWARD-PROPAGATING SEGMENTS/LEWPS. THESE

MAY...IN TIME...EXTEND THE SVR THREAT /DMGG WIND...HAIL...AND

POSSIBLY A TORNADO/ SE TOWARD THE SAN ANTONIO/AUSTIN AREAS.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 31035.





...CORFIDI

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