

346 

WWUS20 KWNS 142100

SEL5

SPC WW 142100

KSZ000-OKZ000-150400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 615

NWS STORM PREDICTION CENTER NORMAN OK

400 PM CDT SAT AUG 14 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       CENTRAL AND SOUTHERN KANSAS

       NORTHERN OKLAHOMA



EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 400 PM UNTIL

1100 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 70

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 55 MILES WEST

NORTHWEST OF GARDEN CITY KANSAS TO 20 MILES EAST OF CHANUTE

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.



OTHER WATCH INFORMATION...CONTINUE...WW 614...



DISCUSSION...TSTMS SHOULD BECOME PROGRESSIVELY SURFACE-BASED WHILE

INCREASING IN COVERAGE AND INTENSITY ALONG LOW-LEVEL BAROCLINIC ZONE

WHICH IS FORECAST TO INTENSIFY THROUGH THIS EVENING.  AMBIENT AIR

MASS ACROSS SRN KS AND NRN OK IS HOT AND RELATIVELY MOIST WITH

MLCAPE VALUES OF 1500-2000 J/KG.  THIS INSTABILITY IN CONJUNCTION

WITH 35-45 KT OF DEEP WLY SHEAR WILL BE SUPPORTIVE OF ORGANIZED

SEVERE STORMS INCLUDING SUPERCELLS WITH THE 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 28030.





...MEAD

