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WWUS20 KWNS 091822

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SPC WW 091822

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URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 178

NWS STORM PREDICTION CENTER NORMAN OK

120 PM CDT WED APR 9 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       PARTS OF WEST CENTRAL AND NORTHWEST TEXAS



EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 120 PM UNTIL

800 PM CDT.



...THIS IS A PARTICULARLY DANGEROUS SITUATION...



DESTRUCTIVE TORNADOES...LARGE HAIL TO 3 INCHES IN DIAMETER...

THUNDERSTORM WIND GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE

POSSIBLE IN THESE AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 90 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 70 MILES WEST SOUTHWEST OF

SAN ANGELO TEXAS TO 35 MILES EAST SOUTHEAST OF MINERAL WELLS

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

WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).



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...CONTINUE...WW 176...WW 177...



DISCUSSION...POTENT SHEAR PROFILES ARE NOW IN PLACE TO SUPPORT RAPID

SUPERCELL DEVELOPMENT VICINITY WARM FRONT THAT EXTENDS FROM NEAR MAF

ENEWD TO DFW.  MDT/STG WARM SECTOR INSTABILITY WITH LITTLE REMAINING

INHIBITION WRN PORTION OF WATCH WILL LEAD TO RAPID SEVERE

THUNDERSTORM DEVELOPMENT.  POTENTIAL FOR VERY LARGE HAIL AND

TORNADOES WITH ANY SUPERCELL.  ADDITIONALLY LATER IN AFTERNOON

CONCERN INCREASES FOR STRONG TORNADOES AS SHEAR CONTINUES TO

INCREASE. ADDITIONAL MORE ISOLATED INITIATION IS POSSIBLE DOWN THE

DRY LINE WHICH EXTENDS TO RIO GRANDE BIG BEND.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

550. MEAN STORM MOTION VECTOR 24030.





...HALES

