

170 

WWUS20 KWNS 190110

SEL8

SPC WW 190110

KSZ000-MOZ000-190700-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 788

NWS STORM PREDICTION CENTER NORMAN OK

810 PM CDT THU AUG 18 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHEAST AND EAST CENTRAL KANSAS

       NORTHWEST AND WEST CENTRAL MISSOURI



EFFECTIVE THIS THURSDAY NIGHT AND FRIDAY MORNING FROM 810 PM

UNTIL 200 AM CDT.



HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 90

STATUTE MILES EAST AND WEST OF A LINE FROM 20 MILES WEST

NORTHWEST OF SAINT JOSEPH MISSOURI TO 65 MILES SOUTH SOUTHWEST OF

KNOB NOSTER MISSOURI.  FOR A COMPLETE DEPICTION OF THE WATCH SEE

THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).



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 785...WW 786...WW 787...



DISCUSSION...SEVERE STORMS OVER FAR NWRN MO ARE EXPECTED TO CONTINUE

MOVING SSEWD THIS EVENING...WHILE ADDITIONAL STORMS ARE EXPECTED TO

DEVELOP/SPREAD SEWD FROM ERN NEB AS A CONVECTIVELY GENERATED COLD

POOL INTENSIFIES AND CONVECTION GROWS UPSCALE INTO A SEWD MOVING

QLCS..ENHANCED BY THE NOCTURNAL LOW LEVEL JET.  00Z RAOBS AT TOP AND

SGF EXHIBIT STEEP LAPSE RATES AND VERY STRONG INSTABILITY...

PROVIDING A FAVORABLE THERMODYNAMIC ENVIRONMENT FOR THE MAINTENANCE

OF THE SEVERE THREAT TONIGHT.



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

TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70

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

MOTION VECTOR 31030.





...WEISS

