Hazardous Weather Outlook
Issued by NWS Chicago, IL

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000
FLUS43 KLOT 092117
HWOLOT

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
417 PM CDT TUE SEP 9 2014

ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019-
102130-
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-
417 PM CDT TUE SEP 9 2014 /517 PM EDT TUE SEP 9 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 PRODUCE:

   HEAVY RAINFALL WHICH COULD LEAD TO FLASH FLOODING.
   HAIL TO 1 INCH IN DIAMETER.
   WIND GUSTS TO 60 MPH.
   FREQUENT CLOUD TO GROUND LIGHTNING.
   THERE IS A SMALL CHANCE FOR AN ISOLATED TORNADO IS POSSIBLE
   OVER NORTH CENTRAL ILLINOIS LATE THIS EVENING.

  AREAS AFFECTED AND TIMING:

   WIDESPREAD THUNDERSTORMS WILL MOVE INTO NORTHWESTERN AND WEST
   CENTRAL ILLINOIS LATE THIS EVENING AND SPREAD EAST ACROSS
   NORTHEASTERN ILLINOIS AND NORTHWESTERN INDIANA THROUGH THE
   NIGHT AND INTO WEDNESDAY MORNING. THUNDERSTORMS SHOULD MOVE OUT
   OF NORTHWESTERN INDIANA BY LATE TOMORROW AFTERNOON.

  DISCUSSION:

LOW PRESSURE IS DEVELOPING ACROSS THE PLAINS WITH A TRAILING COLD
FRONT EXTENDING TO THE SOUTHWEST. AS THE LOW TRACKS THROUGH THE
MIDDLE MISSISSIPPI VALLEY THIS EVENING...COPIOUS AMOUNTS OF DEEP
LAYER MOISTURE WILL POOL ALONG AND AHEAD OF THE COLD FRONT.
THUNDERSTORMS WILL DEVELOP ALONG AND AHEAD OF THE FRONT AS IT
CROSSES THE MIDWEST. GIVEN THE EXTREME AMOUNTS OF DEEP LAYER
MOISTURE...THE THUNDERSTORMS WILL BE EFFICIENT RAIN PRODUCERS...
WITH VERY HEAVY DOWNPOURS LIKELY. A WIDESPREAD AREA OF AROUND 2
INCHES OF RAINFALL IS EXPECTED. SOME AREAS MAY SEE LOCALLY HIGHER
AMOUNTS OF 3 TO 5 INCHES WITH AREAS OF FLASH FLOODING POSSIBLE.

THERE IS ALSO A SLIGHT RISK OF SEVERE WEATHER LATE THIS EVENING
OVER NORTHWESTERN ILLINOIS. THERE IS THE POTENTIAL FOR LARGE HAIL
AND STRONG...DAMAGING WINDS AND POSSIBLY AN ISOLATED TORNADO.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

THE POTENTIAL EXISTS FOR CONTINUED FLASH FLOODING AND SEVERE
THUNDERSTORMS ACROSS THE OUTLOOK AREA WEDNESDAY. THE MOST LIKELY
TIMING FOR SEVERE THUNDERSTORMS WILL BE LATE WEDNESDAY MORNING
INTO WEDNESDAY AFTERNOON AS THE COLD FRONT MOVES THROUGH THE AREA.
THE PRIMARY RISK FROM SEVERE STORMS WILL BE STRONG DAMAGING
WINDS...LARGE HAIL AND POSSIBLY AN ISOLATED TORNADO. THE SEVERE
THUNDERSTORM AND FLASH FLOOD THREAT WILL DIMINISH FROM NORTHWEST
TO SOUTHEAST THROUGH THE DAY.

WIDESPREAD RAINFALL OF AROUND 2 INCHES IS LIKELY WITH THE
THUNDERSTORMS INTO WEDNESDAY. LOCALLY HIGHER AMOUNTS OF 3 TO 5
INCHES ARE POSSIBLE WHERE MULTIPLE STORMS TRAIN ACROSS THE SAME
LOCATION.

HIGH WAVES WILL CREATE HAZARDOUS SWIMMING CONDITIONS AT LAKE
MICHIGAN BEACHES FROM WEDNESDAY THROUGH SATURDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NECESSARY TONIGHT.

&&

$$

LMZ740>745-102130-
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-
417 PM CDT TUE SEP 9 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE ILLINOIS NEARSHORE
WATERS OF LAKE MICHIGAN AND THE INDIANA NEARSHORE WATERS OF LAKE
MICHIGAN.

.DAY ONE...TONIGHT.

THUNDERSTORMS...WITH FREQUENT LIGHTNING...ARE LIKELY AFTER
MIDNIGHT TONIGHT. SOME THUNDERSTORMS MAY BE SEVERE...PRODUCING
WIND GUSTS IN EXCESS OF 50 KT.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

THUNDERSTORMS ARE LIKELY THROUGH LATE WEDNESDAY AFTERNOON. SOME
STORMS COULD BE SEVERE...PRODUCING WIND GUSTS IN EXCESS OF 50 KT.

GALE FORCE WINDS ARE EXPECTED TO DEVELOP WEDNESDAY MORNING AND
PERSIST THROUGH EARLY WEDNESDAY EVENING.

STRONG WINDS AND HIGH WAVES WILL LEAD TO HAZARDOUS CONDITIONS FOR
SMALL CRAFT WEDNESDAY NIGHT THROUGH SATURDAY.

&&

$$

LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868-
870-872-874-876-878-102130-
LAKE MICHIGAN FROM MICHIGAN CITY IN TO ST. JOSEPH MI 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM SEUL CHOIX POINT TO ROCK ISLAND PASSAGE 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN SOUTH OF A LINE FROM SEUL CHOIX POINT TO THE
MACKINAC BRIDGE AND NORTH OF A LINE FROM CHARLEVOIX MI TO SOUTH
FOX ISLAND 5 NM OFFSHORE-
LAKE MICHIGAN FROM CHARLEVOIX TO POINT BETSIE MI 5 NM OFFSHORE TO
MID LAKE-
LAKE MICHIGAN FROM POINT BETSIE TO MANISTEE MI 5 NM OFFSHORE TO
MID LAKE-
LAKE MICHIGAN FROM ROCK ISLAND PASSAGE TO STURGEON BAY WI-
LAKE MICHIGAN FROM STURGEON BAY TO TWO RIVERS WI 5 NM OFFSHORE TO
MID LAKE-
LAKE MICHIGAN FROM TWO RIVERS TO SHEBOYGAN WI 5 NM OFFSHORE TO
MID LAKE-
LAKE MICHIGAN FROM SHEBOYGAN TO PORT WASHINGTON WI 5 NM OFFSHORE
TO MID LAKE-
LAKE MICHIGAN FROM PORT WASHINGTON TO NORTH POINT LIGHT WI 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM NORTH POINT LIGHT TO WIND POINT WI 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM WIND POINT WI TO WINTHROP HARBOR IL 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM WINTHROP HARBOR TO WILMETTE HARBOR IL 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM WILMETTE HARBOR IL TO MICHIGAN CITY IN 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM PENTWATER TO MANISTEE MI 5 NM OFFSHORE TO MID
LAKE-
LAKE MICHIGAN FROM WHITEHALL TO PENTWATER MI 5 NM OFFSHORE TO MID
LAKE-
LAKE MICHIGAN FROM GRAND HAVEN TO WHITEHALL MI 5 NM OFFSHORE TO
MID LAKE-
LAKE MICHIGAN FROM HOLLAND TO GRAND HAVEN MI 5 NM OFFSHORE TO MID
LAKE-
LAKE MICHIGAN FROM SOUTH HAVEN TO HOLLAND MI 5 NM OFFSHORE TO MID
LAKE-
LAKE MICHIGAN FROM ST. JOSEPH TO SOUTH HAVEN MI 5 NM OFFSHORE TO
MID LAKE-
417 PM CDT TUE SEP 9 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE OPEN WATERS OF LAKE
MICHIGAN.

.DAY ONE...TONIGHT.

THUNDERSTORMS ARE LIKELY AFTER MIDNIGHT TONIGHT...ESPECIALLY FOR
THE SOUTHERN TWO THIRDS OF THE LAKE. SOME THUNDERSTORMS MAY BE
SEVERE...PRODUCING WIND GUSTS IN EXCESS OF 50 KT...ESPECIALLY OVER
THE FAR SOUTHERN PORTIONS OF THE LAKE.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

GALE FORCE WINDS ARE EXPECTED WEDNESDAY MORNING THROUGH THURSDAY
MORNING.

THUNDERSTORMS ARE LIKELY WEDNESDAY...WITH SEVERE STORMS POSSIBLE
ACROSS SOUTHERN LAKE MICHIGAN.

&&

$$

KREIN

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