Wednesday, April 9, 2008

PDS, Tornado Watch 178

Particularly Dangerous Situation (PDS)
Tornado Watch 178
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 178
NWS STORM PREDICTION CENTER NORMAN OK
1:20 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 1:20 PM UNTIL 8:00 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

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