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000 

WWUS20 KWNS 220008

SEL1

SPC WW 220008

KSZ000-MOZ000-OKZ000-220700-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 211

NWS STORM PREDICTION CENTER NORMAN OK

705 PM CDT MON APR 21 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       CENTRAL AND EASTERN KANSAS

       NORTHWEST MISSOURI

       NORTHERN OKLAHOMA



EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 705 PM UNTIL

200 AM CDT.



HAIL TO 1.5 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 EAST AND WEST OF A LINE FROM 20 MILES NORTHWEST OF

SAINT JOSEPH MISSOURI TO 25 MILES SOUTH OF PONCA CITY OKLAHOMA.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU1).



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...WIDELY SCTD TSTMS EXPECTED TO FORM THIS EVENING ALONG

SW/NE-ORIENTED  COLD FRONT FROM NW MO INTO S CNTRL KS...AND POSSIBLY

ALONG MORE N/S-ORIENTED CONFLUENCE LINE TO ITS EAST.  SATELLITE AND

VWP/PROFILER DATA SHOW UPR IMPULSE NOW IN ERN CO THAT MAY ENHANCE

UVV AND DEEP SHEAR LATER TONIGHT/EARLY TUESDAY.  IF CONVECTION

SUFFICIENTLY DEEPENS/REMAINS SUSTAINED...SETUP WILL SUPPORT

SUPERCELLS AS LLJ STRENGTHENS SLIGHTLY AFTER DARK.



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

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 26025.





...CORFIDI

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