Hazardous Weather Outlook
Issued by NWS Chicago, IL

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FLUS43 KLOT 192223
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
423 PM CST Mon Feb 19 2018

ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019-
202230-
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-
423 PM CST Mon Feb 19 2018 /523 PM EST Mon Feb 19 2018/

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

.DAY ONE...Tonight.

WEATHER HAZARDS EXPECTED:
  Significant Flooding Risk.
  Limited Thunderstorm Risk.
  Limited Fog Risk.

DISCUSSION:

Periods of showers and some thunderstorms are likely tonight with
locally heavy rainfall likely, especially north of I-80. The heavy
rain will likely result in flooding, potentially significant.
Also, some locally dense fog is possible tonight, mainly near the
Wisconsin border.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Tuesday...
  Significant Flooding Risk.
  Limited Thunderstorm Risk.
  Elevated Ice Accumulation Risk.
Wednesday...
  Limited Ice Accumulation Risk.

DISCUSSION:

Multiple rounds of showers and thunderstorms will produce
widespread heavy rainfall Tuesday over the entire outlook area and
south of I-80 into Tuesday night. Flooding, potentially quite
significant in some areas, is likely to result from the heavy
rain.

Rain could change to a several hour period of freezing rain before
ending Tuesday night. Some ice accumulation is possible, mainly
on elevated objects like trees, power lines, and untreated bridge
decks.

Many rivers will remain in flood through the week. Some rivers may
reach major flood stage.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be necessary through tonight.

&&

$$

LMZ740>745-202230-
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-
423 PM CST Mon Feb 19 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.
  Limited Fog Risk.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

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

&&

$$

LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868-
870-872-874-876-878-202230-
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-
423 PM CST Mon Feb 19 2018

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

.DAY ONE...Tonight.

There is chance of thunderstorms, mainly over southern portions of
the lake. Dense fog is also possible.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

There is chance of thunderstorms, mainly for southern portions of the
lake Tuesday. Dense fog is also possible Tuesday.

&&

$$

- Izzi

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