WATCHES: Severe Thunderstorm Watch Number 685

WWUS20 KWNS 251854
SEL5
SPC WW 251854
KSZ000-OKZ000-TXZ000-260100-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 685
NWS STORM PREDICTION CENTER NORMAN OK
155 PM CDT SAT SEP 25 2010

THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

SOUTH CENTRAL KANSAS
NORTHWEST OKLAHOMA
NORTHERN TEXAS PANHANDLE

EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 155 PM UNTIL
800 PM 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 50
STATUTE MILES EITHER SIDE OF A LINE FROM 40 MILES WEST NORTHWEST
OF BORGER TEXAS TO 10 MILES SOUTH SOUTHEAST OF EMPORIA KANSAS.
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...SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP SOON
ALONG SURFACE COLD FRONT AND PRE-FRONTAL WIND SHIFT FROM CENTRAL KS
INTO THE TX PANHANDLE. THESE STORMS WILL TRACK SLOWLY SOUTHWARD AND
ACROSS A NARROW BUT STRONG INSTABILITY CORRIDOR. STEEP MID LEVEL
LAPSE RATES...FAVORABLE DEEP LAYER SHEAR...AND AMPLE MOISTURE WILL
HELP TO SUPPORT A FEW SEVERE STORMS CAPABLE OF LARGE HAIL AND
DAMAGING WINDS.

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 36020.

...HART

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
To unsubscribe from WX-STORM send e-mail to LISTSERV@LISTSERV.ILLINOIS.EDU with
"unsub wx-storm" in the body of your message. For more information write cnovy@cox.net.