

000 

WWUS20 KWNS 180656

SEL9

SPC WW 180656

TXZ000-181400-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 129

NWS STORM PREDICTION CENTER NORMAN OK

150 AM CDT TUE MAR 18 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       CENTRAL AND SOUTH CENTRAL TEXAS



EFFECTIVE THIS TUESDAY MORNING FROM 150 AM UNTIL 900 AM CDT.



TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 70 STATUTE

MILES EAST AND WEST OF A LINE FROM 45 MILES SOUTH SOUTHEAST OF

DEL RIO TEXAS TO 40 MILES NORTHEAST OF BROWNWOOD TEXAS.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU9).



REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR

TORNADOES AND 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.



OTHER WATCH INFORMATION...THIS TORNADO WATCH REPLACES TORNADO

WATCH NUMBER 126. WATCH NUMBER 126 WILL NOT BE IN EFFECT AFTER

150 AM CDT. CONTINUE...WW 127...WW 128...



DISCUSSION...STRONG/SEVERE STORMS ARE CONTINUING TO LIFT NNEWD FROM

NEAR DRT TO NE OF ABI...WITH NORTHERN-MOST STORMS BECOMING

INCREASINGLY ELEVATED AS THE FRONTAL BOUNDARY MOVES SEWD ACROSS THE

NRN PART OF TX.  INTENSE UPPER LOW APPROACHING SWRN TX IS EXPECTED

TO CONTINUE MOVING SLOWLY EWD DURING THE OVERNIGHT HOURS WITH

PRIMARY DYNAMIC FORCING FOR LARGE SCALE ASCENT PROGRESSING EWD

TOWARD CENTRAL TX.  ALTHOUGH DEEP LAYER WINDS ALOFT ARE LARGELY

MERIDIONAL AS INDICATED BY AREA VWP AND WIND PROFILERS...SELY LOW

LEVEL WINDS ARE RESULTING IN STRONG LOW- AND DEEP-LAYER SHEAR

SUPPORTIVE OF SEVERE STORMS INCLUDING SUPERCELLS.  THREAT FOR

DAMAGING WINDS...HAIL...AND ISOLATED TORNADOES IS EXPECTED TO

PERSIST THROUGH THE PRE-DAWN HOURS.



AVIATION...TORNADOES AND 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 20035.





...WEISS

