SEL5
SPC WW 170442
TXZ000-171000-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 705
NWS STORM PREDICTION CENTER NORMAN OK
1140 PM CDT TUE OCT 16 2007
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
THE CENTRAL AND EASTERN TEXAS PANHANDLE
EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 1140 PM
UNTIL 500 AM 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 60
STATUTE MILES EAST AND WEST OF A LINE FROM 45 MILES SOUTHEAST OF
AMARILLO TEXAS TO 55 MILES NORTH NORTHEAST OF BORGER 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.
DISCUSSION...SLIGHTLY ELEVATED THUNDERSTORMS WILL INCREASE IN
COVERAGE OVERNIGHT IN RESPONSE TO AN APPROACHING MID LEVEL TROUGH
FROM NM...AND INCREASING L0W-LEVEL MOISTURE ON A 40 KT LLJ.
RELATIVELY STEEP LAPSE RATES FROM 850-500 MB AND STRONG EFFECTIVE
BULK SHEAR SHOULD SUPPORT A FEW SUPERCELLS...WHICH WILL LOCALLY
ENHANCE THE LARGE HAIL THREAT.
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 24035.
..THOMPSON
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