WW 450 SEVERE TSTM KS OK 291940Z – 300400Z
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 450
NWS STORM PREDICTION CENTER NORMAN OK
240 PM CDT MON JUL 29 2013
THE NWS STORM PREDICTION CENTER HAS ISSUED A
* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
CENTRAL AND SOUTHERN KANSAS
NORTHERN OKLAHOMA
* EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 240 PM UNTIL
1100 PM CDT.
* PRIMARY THREATS INCLUDE...
SEVERAL LARGE HAIL EVENTS WITH A FEW VERY LARGE HAIL EVENTS TO 2
INCHES IN DIAMETER POSSIBLE
SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE
A FEW TORNADOES POSSIBLE
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 75
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 15 MILES SOUTHWEST
OF DODGE CITY KANSAS TO 40 MILES SOUTH SOUTHEAST OF CHANUTE
KANSAS. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED
WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).
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.
&&
DISCUSSION...TSTMS ARE EXPECTED TO INCREASE IN COVERAGE AND
INTENSITY THIS AFTERNOON ALONG A WARM FRONT SLOWLY LIFTING NWD INTO
CNTRL KS. THE AIR MASS TO THE SOUTH OF THIS BOUNDARY IS QUITE MOIST
WHICH WHEN COUPLED WITH STRONG DAYTIME HEATING AND MODEST MIDLEVEL
LAPSE RATES IS CONTRIBUTING TO MLCAPE VALUES OF 2000-3000 J/KG.
MOREOVER...AREA VAD DATA INDICATE SELY SURFACE WINDS VEERING TO WLY
IN THE MIDLEVELS WHICH IS RESULTING IN SUFFICIENT DEEP-LAYER SHEAR
FOR SUPERCELLS. INITIAL STORMS WILL BE CAPABLE OF LARGE HAIL AND
PERHAPS A TORNADO OR TWO. GREATER TORNADO POTENTIAL APPEARS TO BE
LIMITED BY MODEST MID AND UPPER-LEVEL FLOW AND THE TENDENCY FOR
DESTRUCTIVE STORM INTERFERENCE WITHIN THE FIRST COUPLE OF HOURS
AFTER INITIATION. UPSCALE GROWTH OF STORMS INTO MULTIPLE CLUSTERS
IS ANTICIPATED BY EVENING WITH A CONTINUED RISK FOR DAMAGING WINDS
AND HAIL.
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 27020.
...MEAD
via SPC Forecast Products http://www.spc.noaa.gov/products/watch/ww0450.html
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