WATCHES: Severe Thunderstorm Watch Number 707

WWUS20 KWNS 170650
SEL7
SPC WW 170650
KSZ000-OKZ000-TXZ000-171400-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 707
NWS STORM PREDICTION CENTER NORMAN OK
145 AM CDT WED OCT 17 2007

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

SOUTHWESTERN AND WEST-CENTRAL KANSAS
CENTRAL AND EASTERN PANHANDLE OF OKLAHOMA
CENTRAL AND NORTHERN PANHANDLE OF TEXAS

EFFECTIVE THIS WEDNESDAY MORNING FROM 145 AM UNTIL 900 AM CDT.

HAIL TO 2.5 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 30 MILES SOUTH
SOUTHWEST OF ELKHART KANSAS TO 45 MILES SOUTH SOUTHEAST OF
RUSSELL KANSAS. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).

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...THIS SEVERE THUNDERSTORM WATCH REPLACES
SEVERE THUNDERSTORM WATCH NUMBER 705. WATCH NUMBER 705 WILL NOT
BE IN EFFECT AFTER 145 AM CDT. CONTINUE...WW 706...

DISCUSSION...POTENTIAL FOR SVR HAIL FCST TO INCREASE AS ELEVATED
INFLOW-LAYER AIR MASS DESTABILIZES FROM S-N ACROSS WW AREA. 35-45
KT EFFECTIVE BULK SHEAR MAGNITUDES FCST TO DEVELOP...SUGGESTING
ORGANIZED/PERSISTENT UPDRAFTS AND PERHAPS A FEW ELEVATED
SUPERCELLS...WITH LARGE HAIL BEING PRIMARY CONCERN.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 50
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 400. MEAN STORM
MOTION VECTOR 23035.

..EDWARDS/CORFIDI

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