WATCHES: Severe Thunderstorm Watch Number 218

WWUS20 KWNS 252211
SEL8
SPC WW 252211
KSZ000-NEZ000-260400-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 218
NWS STORM PREDICTION CENTER NORMAN OK
510 PM CDT SAT MAY 25 2013

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
WESTERN KANSAS
EXTREME SOUTHWEST NEBRASKA

* EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 510 PM UNTIL
1100 PM CDT.

* PRIMARY THREATS INCLUDE...
A FEW DAMAGING WIND GUSTS TO 70 MPH POSSIBLE
A FEW LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 50
STATUTE MILES EAST AND WEST OF A LINE FROM 30 MILES WEST
NORTHWEST OF MCCOOK NEBRASKA TO 10 MILES WEST SOUTHWEST OF
LIBERAL KANSAS. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

OTHER WATCH INFORMATION...CONTINUE...WW 217...

DISCUSSION...HIGH-BASED STORMS FORMING ALONG THE DRYLINE WILL SPREAD
SLOWLY EWD THROUGH THIS EVENING...WITH LARGE HAIL THE PRIMARY RISK
IN AN ENVIRONMENT OF MODERATE INSTABILITY/STEEP LAPSE RATES...AND
EFFECTIVE BULK SHEAR OF 25-30 KT. LATER THIS EVENING...STORM
MERGERS COULD LEAD TO SOME UPSCALE GROWTH INTO ONE OR MORE
CLUSTERS...WITH AN ATTENDANT RISK FOR STRONG/DAMAGING OUTFLOW WINDS
BEFORE THE BOUNDARY LAYER STABILIZES TONIGHT.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 27020.


...THOMPSON

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
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.