SEL2
SPC WW 140222
KSZ000-NEZ000-141000-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 702
NWS STORM PREDICTION CENTER NORMAN OK
920 PM CDT SAT OCT 13 2007
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
NORTHERN AND WESTERN KANSAS
SOUTH CENTRAL NEBRASKA
EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 920 PM
UNTIL 500 AM CDT.
HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 60
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 85
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 65 MILES NORTH
NORTHWEST OF GARDEN CITY KANSAS TO 15 MILES NORTHEAST OF
CONCORDIA KANSAS. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).
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...STATIONARY FRONT EXTENDED SW-NE ACROSS SWRN INTO NORTH
CENTRAL KS. APPROACHING UPPER TROUGH IS RESULTING IN STRENGTHENING
LOW LEVEL THETA-E ADVECTION...ESPECIALLY ALONG AND NORTH OF THIS
BOUNDARY. MUCAPES BETWEEN 1500-2000 J/KG AND EFFECTIVE SHEAR AT
50-60 KT WILL BE SUFFICIENT FOR SUPERCELLS. THE EXPECTED ELEVATED
NATURE OF THE STORMS SUGGEST HAIL WILL BE THE MAIN THREAT.
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 50
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 22030.
..IMY
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