FLUS43 KLOT 180908
HWOLOT
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
408 AM CDT FRI SEP 18 2015
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-
408 AM CDT FRI SEP 18 2015
THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.
.DAY ONE...TODAY AND TONIGHT.
WEATHER HAZARDS EXPECTED:
THUNDERSTORMS...SOME MAY PRODUCE:
HAIL TO THE SIZE OF QUARTERS.
WINDS GUSTING TO 60 MPH.
BRIEF DOWNPOURS...LEADING TO FLASH FLOODING.
FREQUENT CLOUD TO GROUND LIGHTNING.
AREAS AFFECTED AND TIMING:
MORNING THUNDERSTORMS ALONG AND SOUTH OF THE INTERSTATE 80
CORRIDOR WILL SLIDE EAST TO SOUTHEAST AND END BY 10 AM.
ADDITIONAL THUNDERSTORMS ARE EXPECTED TO DEVELOP THIS
AFTERNOON ACROSS EXTREME WEST CENTRAL ILLINOIS AND ARRIVE
OVER NORTHERN ILLINOIS LATE THIS AFTERNOON AND CONTINUE
THROUGH TONIGHT...MAINLY FOR AREAS ALONG AND NORTH OF
A STREATOR TO CHICAGO LINE.
DISCUSSION:
A MOIST AXIS HAS BECOME ORIENTED FROM SOUTHWEST TO NORTHEAST
ACROSS NORTHERN ILLINOIS THIS MORNING...WITH THE FIRST
ROUND OF THUNDERSTORMS SLIDING EAST ALONG AND EAST OF A
PONTIAC TO GARY LINE. A BRIEF LULL IN THE THUNDERSTORMS
IS EXPECTED UNTIL A LOW PRESSURE SYSTEM CURRENTLY OVER THE
CENTRAL PLAINS LIFTS NORTHEAST TOWARDS NORTHERN ILLINOIS
LATER THIS EVENING. ADDITIONAL THUNDERSTORMS ARE EXPECTED
TO DEVELOP LATER TODAY INTO THE OVERNIGHT...AND GIVEN THE
VERY MOIST ENVIRONMENT SOME OF THE THUNDERSTORMS MAY EASILY
PRODUCE HEAVY RAINFALL IN A SHORT PERIOD OF TIME. ADDITIONALLY
SOME STRONGER THUNDERSTORMS MAY BE CAPABLE OF PRODUCING HAIL
UP TO THE SIZE OF QUARTERS AND WIND GUSTS UP TO 60 MPH.
.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.
HIGH WAVES WILL CREATE HAZARDOUS SWIMMING CONDITIONS FOR ILLINOIS
AND INDIANA BEACHES ON SATURDAY AND SATURDAY EVENING. THESE HIGH
WAVES COULD ALSO RESULT IN MINOR COASTAL FLOODING AND EROSION
ALONG THE SOUTHERN SHORES OF LAKE MICHIGAN.
.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION MAY BE NEEDED LATE THIS AFTERNOON
THROUGH TONIGHT.
&&
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