

000 

WWUS20 KWNS 140154

SEL5

SPC WW 140154

TXZ000-140900-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 315

NWS STORM PREDICTION CENTER NORMAN OK

855 PM CDT TUE MAY 13 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       CENTRAL TEXAS



EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 855 PM

UNTIL 400 AM CDT.



HAIL TO 2.5 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 145

STATUTE MILES EAST AND WEST OF A LINE FROM 75 MILES WEST

SOUTHWEST OF TEMPLE TEXAS TO 35 MILES NORTH NORTHEAST OF MINERAL

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

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).



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 311...WW 312...WW 314...



DISCUSSION...MCS IS EXPECTED TO EVOLVE AS STORMS MOVE ENEWD ACROSS

THE TX HILL COUNTRY THIS EVENING/OVERNIGHT.  IN ADDITION...STORMS

WILL LIKELY CONTINUE DEVELOPING OVER PORTIONS OF WRN TX AS LLJ

RESPONDS TO APPROACHING UPPER LOW OVER THE SRN ROCKIES.  AIR MASS

ACROSS THE REGION WILL REMAIN MODERATELY UNSTABLE UNDER STEEP MID

LEVEL LAPSE RATES AND WITHIN FEED OF RICH GULF MOISTURE.  LARGE HAIL

WILL BE PRIMARY SEVERE THREAT AS SHEAR REMAINS SUPPORTIVE OF

SPLITTING SUPERCELLS.  SHOULD MCS BECOME MORE LINEAR OVER CENTRAL

TX...DAMAGING WIND THREAT WOULD INCREASE.



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

TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

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

MOTION VECTOR 26035.





...EVANS

