

913 

WWUS20 KWNS 131726

SEL9

SPC WW 131726

ILZ000-MOZ000-140000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 309

NWS STORM PREDICTION CENTER NORMAN OK

1225 PM CDT SUN JUN 13 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       CENTRAL ILLINOIS

       NORTHEAST MISSOURI



EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 1225 PM UNTIL

700 PM 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 90

STATUTE MILES EAST AND WEST OF A LINE FROM 15 MILES NORTH

NORTHWEST OF PEORIA ILLINOIS TO 40 MILES EAST SOUTHEAST OF VICHY

MISSOURI.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).



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...THUNDERSTORMS ARE LIKELY TO INCREASE IN BOTH COVERAGE

AND INTENSITY THROUGH THE AFTERNOON AS MID LEVEL DISTURBANCE OVER IA

AND ERN KS MOVES EAST AND ACTS ON VERY MOIST AND UNSTABLE AIRMASS IN

PLACE ACROSS MO AND IL. MID LEVEL WINDS 25-35KT WILL STRENGTHEN

GRADUALLY AS THE STORMS DEVELOP AND LEND SUPPORT FOR

QUASI-ORGANIZED/PERSISTENT STORM CLUSTERS NON UNLIKE SATURDAY ACROSS

PARTS OF THIS SAME AREA. PRIMARY HAZARDS FROM THESE STORMS WILL BE

DAMAGING DOWNBURST WINDS...ALONG WITH SOME SCATTERED HAIL...PERHAPS

1-2 INCHES IN DIAMETER.



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 550. MEAN STORM

MOTION VECTOR 25025.





...CARBIN

