Northeast Wisconsin Hazardous Weather Outlook

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FLUS43 KGRB 122233
HWOGRB

Hazardous Weather Outlook
National Weather Service Green Bay WI
533 PM CDT Sun Apr 12 2026

WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-132245-
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-
533 PM CDT Sun Apr 12 2026

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

.DAY ONE...Tonight

There is a 20% chance of isolated thunder east of the Fox Valley
this evening. Severe thunderstorms are not expected.

Elevated water levels continue along many rivers, with minor
flooding occurring on the Wolf River, Oconto River, Menominee
River, and a small portion of the Wisconsin River.

.DAYS TWO THROUGH SEVEN...Monday through Sunday

There is an Enhanced Risk (level 3 out of 5) of severe
thunderstorms across much of the area for Monday evening and
overnight. Large hail, damaging winds, and a few tornadoes are
possible.

Periods of heavy rain and thunderstorms continue through
Wednesday, and again late in the week. There is a Marginal Risk
(level 1 out of 5) of severe thunderstorms in parts of central
and east central Wisconsin Tuesday afternoon and evening.

Elevated water levels will continue along many rivers, with minor
flooding on the Wolf River persisting through next week. Runoff
from rainfall and rapid snow melt in the Upper Peninsula will
likely result in minor to moderate flooding on the Menominee
River by early this week.

.SPOTTER INFORMATION STATEMENT...

Spotters are requested to report any flooding to the National
Weather Service in Green Bay.

$$

LMZ521-522-541>543-132245-
The Bay of Green Bay south of a line from Cedar River MI to Rock
Island Passage-Lake Michigan from Washington Island to Sheboygan-
533 PM CDT Sun Apr 12 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 on Lake Michigan
and the bay. Dense fog is expected, especially north of Sturgeon
Bay.

A few thunderstorms are possible on Lake Michigan this evening.

.DAYS TWO THROUGH SEVEN...Monday through Sunday

Conditions hazardous to small craft will continue into Monday
morning on Lake Michigan.

Thunderstorms will be possible at times from Monday night through
Wednesday, and again late in the week.

$$

Kruk

Northeast Wisconsin HWO
Southeast Wisconsin HWO
Upper Michigan HWO