

319 

WWUS20 KWNS 301851

SEL1

SPC WW 301851

KSZ000-MOZ000-310200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 551

NWS STORM PREDICTION CENTER NORMAN OK

150 PM CDT FRI JUL 30 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       PARTS OF NORTHEAST KANSAS

       MUCH OF CENTRAL AND NORTHERN MISSOURI



EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 150 PM UNTIL 900

PM 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 60

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 35 MILES NORTH OF

EMPORIA KANSAS TO 35 MILES EAST NORTHEAST OF JEFFERSON CITY

MISSOURI.  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...NOW THAT AIR MASS HAS BECOME VERY UNSTABLE ACROSS THE

WATCH AREA WITH MLCAPES AOA 3500 J/KG...STORMS WILL INCREASE IN

NUMBER AND INTENSITY ALONG AND JUST AHEAD OF SURFACE BOUNDARY.

BOUNDARY EXTENDS WSWWD ACROSS NRN MO INTO NERN KS.  IN ADDITION TO

POTENTIAL FOR DAMAGING WINDS WITH WET MICRO BURSTS...VERY HEAVY RAIN

RATES WILL OCCUR WITH PWAT IN EXCESS OF 2 INCHES.  WIND THREAT COULD

BECOME BETTER ORGANIZED DURING THE AFTERNOON AS STORMS DEVELOP INTO

CLUSTERS/LINE SEGMENTS AS THEY MOVE S OF E.



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 600. MEAN STORM

MOTION VECTOR 27025.





...HALES

