

490 

WWUS20 KWNS 091654

SEL0

SPC WW 091654

TXZ000-100000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 150

NWS STORM PREDICTION CENTER NORMAN OK

1155 AM CDT THU MAY 9 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  CENTRAL TEXAS



* EFFECTIVE THIS THURSDAY MORNING AND EVENING FROM 1155 AM UNTIL

  700 PM CDT.



* PRIMARY THREATS INCLUDE...

  NUMEROUS LARGE HAIL EVENTS EXPECTED WITH SEVERAL VERY LARGE HAIL

    EVENTS TO 3 INCHES IN DIAMETER POSSIBLE

  SEVERAL DAMAGING WIND GUSTS TO 70 MPH LIKELY

  A FEW TORNADOES POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 25 MILES WEST

NORTHWEST OF SAN ANGELO TEXAS TO 55 MILES EAST OF CORSICANA

TEXAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED

WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



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...CNTRL TX TSTMS EXPECTED TO INCREASE IN

COVERAGE/STRENGTH THROUGH THE AFTN AS ASCENT ASSOCIATED WITH BIG

BEND UPR IMPULSE...IN CONJUNCTION WITH MODEST SFC HEATING AND

CONTINUED 30+ KT INFLOW OF RICH BOUNDARY LAYER AIR...FURTHER

DESTABILIZE REGION. POTENTIAL WILL EXIST FOR EMBEDDED SUSTAINED

STORMS/SUPERCELLS WITH VERY LARGE HAIL/LOCALLY DMGG WIND. SOME

POTENTIAL ALSO WILL EXIST FOR EVENTUAL DEVELOPMENT OF

FORWARD-PROPAGATING SEGMENTS/BOWS WITH A SOMEWHAT MORE WIDESPREAD

RISK FOR DMGG WIND AND POSSIBLY A TORNADO.



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 25030.





...CORFIDI

