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WWUS20 KWNS 010601

SEL0

SPC WW 010601

TXZ000-011400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 120

NWS STORM PREDICTION CENTER NORMAN OK

100 AM CDT SAT MAY 1 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTH CENTRAL AND CENTRAL TEXAS



EFFECTIVE THIS SATURDAY MORNING FROM 100 AM UNTIL 900 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 55

STATUTE MILES EITHER SIDE OF A LINE FROM 15 MILES WEST NORTHWEST

OF DEL RIO TEXAS TO 20 MILES SOUTHEAST OF WACO TEXAS.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU0).



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 117...WW 118...WW 119...



DISCUSSION...TSTMS FORMING ATOP SHALLOW COOL DOME EXPECTED TO

MOVE/DEVELOP NEWD THROUGH DAWN AS REGION IS GLANCED BY AREA OF

ASCENT ON SERN FRINGE OF STRONG UPR TROUGH.  DEGREE OF ELEVATED CAPE

AND POTENTIAL FOR ACTIVITY TO BECOME MORE NEARLY SFC-BASED WITH EWD

EXTENT SUGGEST THREAT FOR BOTH LARGE HAIL AND HIGH WINDS AS MID LVL

SW FLOW REMAINS AOA 60 KTS.



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 550. MEAN STORM

MOTION VECTOR 22035.





...CORFIDI

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