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250 

WWUS20 KWNS 270013

SEL1

SPC WW 270013

IAZ000-ILZ000-MOZ000-270700-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 561

NWS STORM PREDICTION CENTER NORMAN OK

715 PM CDT SUN JUN 26 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHEAST IOWA

       WEST CENTRAL ILLINOIS

       NORTHEAST MISSOURI



EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 715 PM UNTIL

200 AM CDT.



HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 75

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



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 50

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 80 MILES NORTHWEST

OF QUINCY ILLINOIS TO 5 MILES EAST OF SALEM ILLINOIS.  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 555...WW 556...WW

557...WW 559...WW 560...



DISCUSSION...WELL-DEVELOPED STORM CLUSTER APPROACHING SE IA/NE MO

WILL LIKELY CONTINUE ESEWD/SEWD ON THE COOL SIDE OF THE WARM

FRONT...GENERALLY NEAR OR JUST E OF THE MS RIVER.  THE ENVIRONMENT

WILL FAVOR DAMAGING WINDS AND LARGE HAIL AS THE MAIN SEVERE THREATS

WITH THE SLIGHTLY ELEVATED STORMS...WITH BOTH EMBEDDED SUPERCELL AND

BOWING STRUCTURES POSSIBLE.



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

TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 65

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 600. MEAN STORM

MOTION VECTOR 30030.





...THOMPSON

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