450
FLUS43 KLOT 200841
HWOLOT
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
341 AM CDT THU SEP 20 2018
ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019-
210845-
WINNEBAGO-BOONE-MCHENRY-LAKE IL-OGLE-LEE-DEKALB-KANE-DUPAGE-COOK-
LA SALLE-KENDALL-GRUNDY-WILL-KANKAKEE-LIVINGSTON-IROQUOIS-FORD-
LAKE IN-PORTER-NEWTON-JASPER-BENTON-
341 AM CDT THU SEP 20 2018 /441 AM EDT THU SEP 20 2018/
THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL
ILLINOIS...NORTHEAST ILLINOIS AND NORTHWEST INDIANA.
DAY ONE
EARLY THIS MORNING THROUGH TONIGHT.
WEATHER HAZARDS EXPECTED...
ELEVATED THUNDERSTORM RISK.
LIMITED EXCESSIVE HEAT RISK.
DISCUSSION...
SCATTERED THUNDERSTORMS ARE POSSIBLE EARLY THIS MORNING ACROSS
FAR NORTHERN ILLINOIS, MAINLY NORTH OF THE INTERSTATE 88 CORRIDOR.
SOME OF THESE STORMS MAY PRODUCE LOCALLY HEAVY RAINFALL NEAR THE
WISCONSIN STATE LINE. ISOLATED THUNDERSTORMS ARE POSSIBLE ACROSS
THE REMAINDER OF THE AREA TODAY, AS A WARM FRONT LIFTS ACROSS THE
REGION. AS THE WARM FRONT LIFTS NORTH, TEMPERATURES WILL WARM TO
AROUND 90 OR THE LOWER 90S IN MANY SPOTS, WITH HEAT INDEX VALUES
PEAKING IN THE 94 TO 102 RANGE DURING THE WARMEST PART OF THE
AFTERNOON. THERE IS AN ADDITIONAL CHANCE OF THUNDERSTORMS LATE
TONIGHT AS A COLD FRONT MOVES THROUGH.
DAYS TWO THROUGH SEVEN
FRIDAY THROUGH WEDNESDAY.
FRIDAY...
LIMITED THUNDERSTORM RISK.
HIGH SWIM RISK
SATURDAY...
HIGH SWIM RISK
MONDAY...
LIMITED THUNDERSTORM RISK.
TUESDAY...
ELEVATED THUNDERSTORM RISK.
DISCUSSION:
SCATTERED THUNDERSTORMS WILL END FROM NORTHWEST TO SOUTHEAST
ACROSS THE AREA FRIDAY, AS A COLD FRONT MOVES THROUGH THE AREA.
GUSTY NORTH WINDS WILL DEVELOP LATER IN THE DAY AND CONTINUE
FRIDAY NIGHT, WHICH WILL RESULT IN BUILDING WAVES AND DANGEROUS
SWIM CONDITIONS DEVELOPING AT LAKE MICHIGAN BEACHES.
SPOTTER INFORMATION STATEMENT
SPOTTER ACTIVATION WILL NOT BE NECESSARY THROUGH TONIGHT.
GENERAL STORM MOTION OF THE DAY:
MOVING TOWARD THE EAST-NORTHEAST AT 30 MPH.
LMZ740>745-210845-
WINTHROP HARBOR TO WILMETTE HARBOR-
WILMETTE HARBOR TO NORTHERLY ISLAND-
NORTHERLY ISLAND TO CALUMET HARBOR-CALUMET HARBOR TO GARY-
GARY TO BURNS HARBOR-BURNS HARBOR TO MICHIGAN CITY-
341 AM CDT THU SEP 20 2018
THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF THE ILLINOIS
NEARSHORE WATERS OF LAKE MICHIGAN AND THE INDIANA NEARSHORE
WATERS OF LAKE MICHIGAN.
DAY ONE
EARLY THIS MORNING THROUGH TONIGHT.
WEATHER HAZARDS EXPECTED...
HAZARDOUS CONDITIONS FOR SMALL CRAFT.
ELEVATED THUNDERSTORM RISK.
DAYS TWO THROUGH SEVEN
FRIDAY THROUGH WEDNESDAY.
FRIDAY...
HAZARDOUS CONDITIONS FOR SMALL CRAFT ARE LIKELY.
LIMITED THUNDERSTORM RISK.
SATURDAY...
HAZARDOUS CONDITIONS FOR SMALL CRAFT ARE LIKELY.
MONDAY AND TUESDAY...
LIMITED THUNDERSTORM RISK.
RATZER
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