

216 

WWUS20 KWNS 242032

SEL1

SPC WW 242032

ILZ000-KSZ000-MOZ000-250300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 531

NWS STORM PREDICTION CENTER NORMAN OK

335 PM CDT SAT JUL 24 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       PARTS OF WESTERN ILLINOIS

       PARTS OF NORTHEAST KANSAS

       MUCH OF NORTHERN MISSOURI



EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 335 PM UNTIL

1000 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 15 MILES EAST

SOUTHEAST OF QUINCY ILLINOIS TO 20 MILES SOUTHWEST OF TOPEKA

KANSAS.  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.



OTHER WATCH INFORMATION...CONTINUE...WW 529...WW 530...



DISCUSSION...THUNDERSTORMS ARE INCREASING IN NUMBER AND INTENSITY

ALONG AND N OF BOUNDARY THAT EXTENDS FROM SERN IA WSWWD THRU MKC.

WITH MLCAPES AOA 3500 J/KG AND 25-30KT OF SHEAR...DAMAGING WINDS

WILL BE LIKELY WITH THE STRONGEST UPDRAFTS ALONG WITH LARGE HAIL.

STORMS WILL GRADUALLY DEVELOP E/SE THRU THE EVENING.



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 27020.





...HALES

