Hazardous Weather Outlook
Issued by NWS Chicago, IL

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526
FLUS43 KLOT 202227
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
427 PM CST Tue Feb 20 2018

ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019-
212230-
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-
427 PM CST Tue Feb 20 2018 /527 PM EST Tue Feb 20 2018/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.

.DAY ONE...Tonight.

WEATHER HAZARDS EXPECTED:
  Limited Thunderstorm Risk.
  Extreme Flooding Risk.
  Elevated Fog Risk.
  Elevated Ice Accumulation Risk.

DISCUSSION:

Periods of rain will continue across the area tonight. The
heaviest rain and chances for additional thunderstorms will mainly
be southeast of I-57. Runoff from this rainfall will continue to
cause flooding, and significant sharp rises on most area rivers
and creeks.

A cold front will move across the area this evening, and rain is
expected to change over to a period of freezing rain and sleet
before ending overnight. Some ice accumulation and glazing is
possible overnight.

Many area rivers will remain in flood.


.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Wednesday...
  Limited Ice Accumulation Risk.
  Limited Sleet Risk.
Thursday...
  Elevated Ice Accumulation Risk.
Friday...
  Limited Ice Accumulation Risk.

DISCUSSION:

A couple of periods of light freezing rain or sleet are
possible Wednesday night into early Thursday, and Thursday night
into early Friday across portions of the outlook area.

Most area rivers will remain in or near flood for the next
several days.


.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be necessary through tonight.


&&

$$

LMZ740>745-212230-
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-
427 PM CST Tue Feb 20 2018

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

.DAY ONE...Tonight.

  Limited Thunderstorm Risk.
  Hazardous Conditions for Small Craft are likely.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Saturday and Sunday...
  Hazardous Conditions for Small Craft are likely.

&&

$$

LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868-
870-872-874-876-878-212230-
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-
427 PM CST Tue Feb 20 2018

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

.DAY ONE...Tonight.

Elevated Fog Risk on the southern portion of the lake
through this evening.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

No hazardous weather is expected at this time.

&&

$$

KJB

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