Northeast Wisconsin Hazardous Weather Outlook

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FLUS43 KGRB 202018
HWOGRB

Hazardous Weather Outlook
National Weather Service Green Bay WI
318 PM CDT Mon Apr 20 2026

WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-212030-
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-
318 PM CDT Mon Apr 20 2026

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

.DAY ONE...Tonight

Minor to moderate flooding continues on the Menominee and Wolf
Rivers and associated tributaries, with major flooding on the
Wolf River at New London.

.DAYS TWO THROUGH SEVEN...Tuesday through Monday

Minor to moderate flooding continues on the Menominee and Wolf
Rivers and associated tributaries, with major flooding expected
on the Wolf River at New London through Tuesday night. Water
levels have crested in most areas, and due to an extended period
of dry weather, a gradually drop is anticipated through the week.

There is a chance of thunderstorms Thursday night into Friday.
Locally heavy rainfall is possible.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed tonight.

$$

LMZ521-522-541>543-212030-
The Bay of Green Bay south of a line from Cedar River MI to Rock
Island Passage-Lake Michigan from Washington Island to Sheboygan-
318 PM CDT Mon Apr 20 2026

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

.DAY ONE...Tonight

Conditions hazardous to small craft are expected.

.DAYS TWO THROUGH SEVEN...Tuesday through Monday

Conditions hazardous to small craft are expected to continue into
Tuesday, and again Thursday into Friday.

There is a chance of thunderstorms late Thursday night into
Friday.

$$
Kieckbusch

Northeast Wisconsin HWO
Southeast Wisconsin HWO
Upper Michigan HWO