National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Watches, Warnings & Advisories


2 products found for Marine Zone: LMZ541

Small Craft Advisory

URGENT - MARINE WEATHER MESSAGE
National Weather Service Green Bay WI
217 PM CDT Sat Oct 4 2025

LMZ541>543-050330-
/O.CON.KGRB.SC.Y.0075.251004T2100Z-251006T1200Z/
Rock Island Passage to Sturgeon Bay WI-
Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI-
217 PM CDT Sat Oct 4 2025

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 AM CDT MONDAY...

* WHAT...South winds 15 to 20 kts with gusts up to 25 kts late
  this afternoon. South winds will then increase to 20 to 25 kts
  with gusts from 30 to 35 kts on Sunday afternoon before
  subsiding Sunday evening. Waves building to 3 to 5 ft by late
  this afternoon will increase to 6 to 9 ft on Sunday afternoon.
  Waves will subside late Sunday night.

* WHERE...Lake Michigan nearshore waters from Washington Island
  to Sheboygan.

* WHEN...From 4 PM this afternoon to 7 AM CDT Monday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

mpc

Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Green Bay WI
220 PM CDT Sat Oct 4 2025

LMZ521-522-541>543-051930-
The Bay of Green Bay south of a line from Cedar River MI to Rock
Island Passage-Lake Michigan from Washington Island to Sheboygan-
220 PM CDT Sat Oct 4 2025

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

.DAY ONE...Tonight

Increasing southerly winds and building waves will result in
conditions becoming hazardous to small craft on Lake Michigan
beginning late this afternoon.

.DAYS TWO THROUGH SEVEN...Sunday through Saturday

Strong and gusty southerly winds and building waves will result
in conditions hazardous to small craft on Lake Michigan through
Monday morning. Hazardous marine conditions will also occur on
the Bay of Green Bay on Sunday and Sunday night.

There is a chance of thunderstorms late Sunday night. Any storm
could pose a hazard to mariners.

$$

MPC