

546 

WWUS20 KWNS 220751

SEL7

SPC WW 220751

KSZ000-MOZ000-221400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 177

NWS STORM PREDICTION CENTER NORMAN OK

250 AM CDT FRI APR 22 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHEAST KANSAS

       NORTHWEST MISSOURI



EFFECTIVE THIS FRIDAY MORNING FROM 250 AM UNTIL 900 AM 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 60

STATUTE MILES EITHER SIDE OF A LINE FROM 40 MILES NORTHWEST OF

SALINA KANSAS TO 25 MILES EAST SOUTHEAST OF KANSAS CITY MISSOURI.

 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.



DISCUSSION...ELEVATED STORMS DEVELOPING IN WARM ADVECTION REGIME

ACROSS E-CNTRL THROUGH NERN KS WILL SPREAD NEWD...EVENTUALLY INTO

NWRN MO. MUCAPE TO 2500 J/KG...LAPSE RATES OF 8-8.5 C AND EFFECTIVE

SHEAR SUFFICIENT FOR UPDRAFT ROTATION WILL SUPPORT A THREAT OF LARGE

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 24035.





...DIAL

