WHUS73 KLOT 200829
MWWLOT

URGENT - MARINE WEATHER MESSAGE
National Weather Service Chicago IL
329 AM CDT Wed May 20 2026

LMZ740>742-201630-
/O.EXT.KLOT.SC.Y.0060.260520T1500Z-260521T1800Z/
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
329 AM CDT Wed May 20 2026

...SMALL CRAFT ADVISORY NOW IN EFFECT FROM 10 AM THIS MORNING TO
1 PM CDT THURSDAY...

* WHAT...Northeast winds to 25 kt and significant waves to 6 ft 
  occasionally to 8 ft expected.

* WHERE...Winthrop Harbor to Calumet Harbor IL.

* WHEN...From 10 AM this morning to 1 PM CDT Thursday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

LMZ743>745-201630-
/O.EXT.KLOT.SC.Y.0060.260520T1200Z-260521T1200Z/
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
329 AM CDT Wed May 20 2026

...SMALL CRAFT ADVISORY NOW IN EFFECT FROM 7 AM THIS MORNING TO
7 AM CDT THURSDAY...

* WHAT...Northeast winds to 25 kt and significant waves to 6 ft 
  occasionally to 8 ft expected.

* WHERE...Calumet Harbor IL to Michigan City IN.

* WHEN...From 7 AM this morning to 7 AM CDT Thursday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$