FLUS43 KGRB 181901
HWOGRB

Hazardous Weather Outlook
National Weather Service Green Bay WI
201 PM CDT Mon May 18 2026

WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-191915-
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-
201 PM CDT Mon May 18 2026

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

.DAY ONE...Tonight

Though an isolated severe storm could develop through early 
evening, a general lull in thunderstorm activity is expected. 
Thunderstorms will increase again later this evening and into the 
overnight hours, with the best potential for severe storms occurring
from central to north-central WI between 11 pm and 4 am. Damaging winds
appear to be the primary threat.

.DAYS TWO THROUGH SEVEN...Tuesday through Monday

There is a chance of non-severe storms Tuesday morning.

There is potential for frost or freeze headlines across mainly 
northern Wisconsin Tuesday night and Wednesday night. 

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed at times tonight.

$$

LMZ521-522-541>543-191915-
The Bay of Green Bay south of a line from Cedar River MI to Rock
Island Passage-Lake Michigan from Washington Island to Sheboygan-
201 PM CDT Mon May 18 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 through this
evening, especially on Lake Michigan. Patchy dense fog will be
possible as well. 

There is a chance of thunderstorms. 

.DAYS TWO THROUGH SEVEN...Tuesday through Monday

Thunderstorms will be possible Tuesday morning. Any thunderstorm 
could pose a hazard to mariners.

Conditions hazardous to small craft are expected through Tuesday
evening.

$$

JLA