FLUS43 KLOT 202249
HWOLOT
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
549 PM CDT TUE MAY 20 2014
WINNEBAGO-BOONE-MCHENRY-LAKE ILLINOIS-OGLE-LEE-DE KALB-KANE-
DUPAGE-COOK-LA SALLE-KENDALL-GRUNDY-WILL-KANKAKEE-LIVINGSTON-
IROQUOIS-FORD-LAKE INDIANA-PORTER-NEWTON-JASPER-BENTON-
549 PM CDT TUE MAY 20 2014 /649 PM EDT TUE MAY 20 2014/
THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.
.DAY ONE...TONIGHT.
WEATHER HAZARDS EXPECTED:
THUNDERSTORMS...SOME OF WHICH MAY BE SEVERE WITH:
HAIL TO THE SIZE OF GOLF BALLS.
DAMAGING WINDS.
ISOLATED FLASH FLOODING.
AN OUTSIDE CHANCE OF A TORNADO.
AREAS AFFECTED AND TIMING:
SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP BY EARLY THIS
EVENING ACROSS FAR NORTHERN ILLINOIS AND EXPAND IN COVERAGE
THROUGH THE EVENING ACROSS MUCH OF NORTH CENTRAL AND NORTHEAST
ILLINOIS...AND INTO NORTHWEST INDIANA. STORMS WILL SLOWLY
DIMINISH IN COVERAGE AND INTENSITY OVERNIGHT. THE SEVERE
WEATHER THREAT LOOKS TO BE AT ITS PEAK ALONG...AND NORTH OF
INTERSTATE 80...AND MAINLY BETWEEN 6 PM AND 1 AM.
DISCUSSION:
A WEAK COLD FRONT WILL MOVE SLOWLY SOUTHEAST INTO THE AREA THIS
EVENING. SCATTERED THUNDERSTORMS WILL LIKELY DEVELOP ALONG OR
JUST AHEAD OF THE FRONT ACROSS FAR NORTHERN ILLINOIS LATE THIS
AFTERNOON. THESE INITIAL STORMS WILL BE CAPABLE OF LARGE HAIL
AND STRONG WINDS...ALONG WITH AN OUTSIDE CHANCE OF A TORNADO.
AS WINDS ALOFT INCREASE THIS EVENING STORMS WILL LIKELY ORGANIZE
AND HAVE THE GREATEST POTENTIAL OF PRODUCING STRONG WINDS AS
THEY EVOLVE SOUTHEAST ACROSS THE REGION...INCLUDING ACROSS THE
CHICAGO METRO AREA. THE STORMS WILL MAINTAIN A HAIL THREAT AS
WELL AS AN ISOLATED FLASH FLOOD THREAT...AS IT IS POSSIBLE FOR A
SEVERAL HOUR PERIOD OF STORMS IN SOME COMMUNITIES. STORMS SHOULD
SLOWLY DIMINISH IN INTENSITY OVERNIGHT...WITH A SLOW PROGRESSION
SOUTHWARD.
.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.
THERE IS A CHANCE OF THUNDERSTORMS SOUTH OF INTERSTATE 80 ON
WEDNESDAY. SOME OF THESE STORMS COULD AGAIN BE STRONG TO
SEVERE...WITH LARGE HAIL AND DAMAGING WINDS THE MAIN THREATS FROM
ANY SEVERE STORMS.
THERE IS A SLIGHT CHANCE OF THUNDERSTORMS ACROSS NORTH CENTRAL
ILLINOIS SUNDAY AND SUNDAY NIGHT.
THUNDERSTORMS ARE ALSO POSSIBLE NORTH OF INTERSTATE 80 ON MONDAY.
.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION WILL LIKELY BE NEEDED THROUGH
TONIGHT...ESPECIALLY IN AREAS NORTH OF INTERSTATE 80.
&&
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