

586 

WWUS20 KWNS 112008

SEL4

SPC WW 112008

ILZ000-INZ000-WIZ000-LMZ000-120300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 144

NWS STORM PREDICTION CENTER NORMAN OK

305 PM CDT SUN MAY 11 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  CENTRAL AND NORTHERN ILLINOIS

  NORTHWESTERN INDIANA

  SOUTHERN WISCONSIN

  LAKE MICHIGAN



* EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 305 PM UNTIL

  1000 PM CDT.



* PRIMARY THREATS INCLUDE...

  ISOLATED VERY LARGE HAIL EVENTS TO 2 INCHES IN DIAMETER POSSIBLE

  ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  A TORNADO OR TWO POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 85

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 50 MILES NORTH OF

MOLINE ILLINOIS TO 55 MILES NORTHEAST OF MARSEILLES ILLINOIS.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU4).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



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 141...WW 142...WW 143...



DISCUSSION...AS A CONVECTIVELY GENERATED CYCLONIC VORTICITY CENTER

AND ASSOCIATED MID-LEVEL JET STREAK MIGRATE NORTHEASTWARD OUT OF

IOWA INTO THE UPPER MIDWEST...AT LEAST SCATTERED SEVERE STORM

DEVELOPMENT IS EXPECTED LATE THIS AFTERNOON.  THE EVOLUTION OF AN

ORGANIZING STORM CLUSTER ALSO APPEARS POSSIBLE ACROSS SOUTHERN

WISCONSIN AND NORTHERN ILLINOIS...WHICH COULD IMPACT THE MILWAUKEE

AND CHICAGO METROPOLITAN AREAS WITH THE RISK OF POTENTIALLY DAMAGING

WIND GUSTS...IN ADDITION TO SEVERE HAIL...BY EARLY EVENING.



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 500. MEAN STORM

MOTION VECTOR 26025.





...KERR

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