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WWUS20 KWNS 202035

SEL5

SPC WW 202035

KSZ000-MOZ000-210400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 505

NWS STORM PREDICTION CENTER NORMAN OK

335 PM CDT TUE JUL 20 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHEAST AND EAST CENTRAL KANSAS

       NORTHERN AND CENTRAL MISSOURI



EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 335 PM UNTIL

1100 PM CDT.



HAIL TO 2.5 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 55

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 25 MILES SOUTH

SOUTHWEST OF CONCORDIA KANSAS TO 10 MILES NORTH NORTHEAST OF

COLUMBIA MISSOURI.  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 502...WW 503...WW 504...



DISCUSSION...PREVIOUSLY ELEVATED THUNDERSTORMS ARE INTENSIFYING OVER

NERN KS AS STRONG HEATING IS GRADUALLY WEAKENING THE CAP...WITH

STORMS SHOWING SIGNS OF BECOMING BASED IN THE PBL.  ENVIRONMENT IS

VERY WARM/MOIST WITH MLCAPE OF 2500-3500 J/KG...AND DESTABILIZATION

IS CONTINUING TO OCCUR INTO WRN MO IN THE WAKE OF MORNING STORMS.

STRONG EFFECTIVE LAYER SHEAR OF 40-50 KT WILL SUPPORT SEVERE STORMS

INCLUDING ISOLATED SUPERCELLS.  CONVECTION IS EXPECTED TO PROGRESS

EWD AND GRADUALLY DEVELOP UPSCALE INTO A FORWARD PROPAGATING

MCS...WITH THREAT FOR DAMAGING WIND GUSTS...LARGE HAIL...AND A BRIEF

TORNADO OR TWO.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM

MOTION VECTOR 27030.





...WEISS

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