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Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
329 PM CDT Thu Sep 21 2017

LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868-
870-872-874-876-878-222030-
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-
329 PM CDT Thu Sep 21 2017

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

.DAY ONE...Tonight.

  Elevated Fog Risk.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Friday Morning...
  Elevated Fog Risk.
Monday Night through Wednesday...
  Limited Thunderstorm Risk.

&&

$$

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Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
329 PM CDT Thu Sep 21 2017

ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019-
222030-
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-
329 PM CDT Thu Sep 21 2017 /429 PM EDT Thu Sep 21 2017/

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

.DAY ONE...Tonight.

WEATHER HAZARDS EXPECTED:

  Limited Fog Risk.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Friday Morning...
  Limited Fog Risk.
Tuesday and Wednesday...
  Limited Thunderstorm Risk.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be necessary through tonight.

&&

$$

Hazardous Weather Outlook...UPDATED
National Weather Service Quad Cities IA IL
318 PM CDT Thu Sep 21 2017

IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-222030-
Buchanan-Delaware-Dubuque-Benton-Linn-Jones-Jackson-Iowa-Johnson-
Cedar-Clinton-Muscatine-Scott-Keokuk-Washington-Louisa-Jefferson-
Henry IA-Des Moines-Van Buren-Lee-Jo Daviess-Stephenson-Carroll-
Whiteside-Rock Island-Henry IL-Bureau-Putnam-Mercer-Henderson-
Warren-Hancock-McDonough-Scotland-Clark-
318 PM CDT Thu Sep 21 2017

This Hazardous Weather Outlook is for portions of north central
Illinois...northwest Illinois...west central Illinois...east
central Iowa...northeast Iowa...southeast Iowa and northeast
Missouri.

.DAY ONE...THIS AFTERNOON AND TONIGHT

Heat and humidity will produce afternoon heat index readings in
the middle to upper 90s across portions of east central and
southeast Iowa, northeast Missouri, and west central Illinois.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

Unseasonably warm temperatures and high humidity will combine to
produce heat index readings in the low to mid 90s Friday, and in
the lower 90s for Saturday afternoon.

Thunderstorm chances return to the Outlook Area from late Monday
into Tuesday. It is too early to determine if there will be any
severe weather threat early next week.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today or tonight.

$$

12/Gibbs

Hazardous Weather Outlook
National Weather Service Green Bay WI
303 PM CDT Thu Sep 21 2017

LMZ521-522-541>543-222015-
The Bay of Green Bay south of a line from Cedar River MI to Rock
Island Passage-Lake Michigan from Washington Island to Sheboygan-
303 PM CDT Thu Sep 21 2017

This Hazardous Weather Outlook is for portions of northwest Lake
Michigan and the waters of Green Bay.

.DAY ONE...Tonight

There is a small chance of thunderstorms tonight. Some storms may
produce small hail.

Areas of dense marine fog will pose a hazard to mariners tonight.

.DAYS TWO THROUGH SEVEN...Friday through Thursday

Areas of dense fog will continue to pose a hazard to mariners on
Friday morning.

There is a small chance of thunderstorms across the entire area
Monday night through Tuesday night.

$$
Kieckbusch/MPC

Hazardous Weather Outlook
National Weather Service Green Bay WI
303 PM CDT Thu Sep 21 2017

WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-222015-
Vilas-Oneida-Forest-Florence-Northern Marinette County-Lincoln-
Langlade-Menominee-Northern Oconto County-Door-Marathon-Shawano-
Wood-Portage-Waupaca-Outagamie-Brown-Kewaunee-Waushara-Winnebago-
Calumet-Manitowoc-Southern Marinette County-
Southern Oconto County-
303 PM CDT Thu Sep 21 2017

This Hazardous Weather Outlook is for north-central and northeast
Wisconsin.

.DAY ONE...Tonight

There is a small chance of thunderstorms across the region
tonight. A few storms across north central Wisconsin may be
capable of producing large hail.

.DAYS TWO THROUGH SEVEN...Friday through Thursday

There is a slight chance of storms across mainly north central
Wisconsin at times from Saturday through Sunday night. These
storms are not expected to be severe.

There is a chance of thunderstorms at times Monday into Tuesday
night. It is too early to determine if any of these storms will
become severe.

.SPOTTER INFORMATION STATEMENT...

Formal spotter activation will not be needed tonight, but
spotters are requested to report any occurrences of hail.

$$

Hazardous Weather Outlook
National Weather Service La Crosse WI
206 PM CDT Thu Sep 21 2017

IAZ008>011-018-019-029-030-MNZ079-086>088-094>096-WIZ017-029-
032>034-041>044-053>055-061-221200-
Mitchell-Howard-Winneshiek-Allamakee-Floyd-Chickasaw-Fayette-
Clayton-Wabasha-Dodge-Olmsted-Winona-Mower-Fillmore-Houston-
Taylor-Clark-Buffalo-Trempealeau-Jackson-La Crosse-Monroe-Juneau-
Adams-Vernon-Crawford-Richland-Grant-
206 PM CDT Thu Sep 21 2017

This Hazardous Weather Outlook is for portions of southeast
Minnesota...northeast Iowa and southwest into central Wisconsin.

.DAY ONE...Through Tonight

Isolated thunderstorms are possible. Severe weather is not
expected.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

Friday through Sunday...Unusual heat and humidity is expected
with record temperatures. Heat index values of 95-100F are
expected Friday, 90-95F on Saturday, and 85-90F on Sunday.

Thunderstorms are possible from late Sunday night through
Tuesday. It is too early to discern if there would be a severe
threat.

.SPOTTER INFORMATION STATEMENT...

No action needed.

.EMERGENCY MANAGEMENT COORDINATION...

No webinar is scheduled.

$$
Boyne/Baumgardt

U.S. Dept. of Commerce
NOAA National Weather Service
1325 East West Highway
Silver Spring, MD 20910
E-mail: w-nws.webmaster@noaa.gov
Page last modified: June 2, 2009
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