

339 

WWUS20 KWNS 061655

SEL7

SPC WW 061655

TXZ000-062300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 757

NWS STORM PREDICTION CENTER NORMAN OK

1155 AM CDT TUE OCT 6 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       CENTRAL AND NORTH CENTRAL TEXAS



EFFECTIVE THIS TUESDAY MORNING AND EVENING FROM 1155 AM UNTIL 600

PM 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 50

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 30 MILES NORTH

NORTHWEST OF SAN ANGELO TEXAS TO 15 MILES SOUTH SOUTHEAST OF

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

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).



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 756...



DISCUSSION...ELEVATED TSTM DEVELOPMENT /INCLUDING A SUPERCELL OR

TWO/ WILL CONTINUE WITHIN FEED OF MODERATE MUCAPE BEHIND SHALLOW

SURFACE COLD FRONT SAGGING SSEWD INTO CENTRAL TX THIS AFTERNOON.

GIVEN EFFECTIVE SHEAR AROUND 40-50 KT AND MODEST LAPSE

RATES...POTENTIAL FOR ISOLATED LARGE HAIL AND PERHAPS A

STRONG/SEVERE WIND REPORT REMAINS WITH THE STRONGER CORES.



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 25020.





...EVANS

