426
WHUS73 KLOT 200759
MWWLOT

URGENT - MARINE WEATHER MESSAGE
National Weather Service Chicago IL
259 AM CDT Wed Aug 20 2025

LMZ740>742-201600-
/O.CAN.KLOT.SC.Y.0077.000000T0000Z-250821T0900Z/
/O.NEW.KLOT.SC.Y.0078.250820T1200Z-250821T0900Z/
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
259 AM CDT Wed Aug 20 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 7 AM THIS MORNING TO 4 AM
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 7 AM this morning to 4 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.

&&

$$

LMZ743>745-201600-
/O.CON.KLOT.SC.Y.0077.000000T0000Z-250821T0900Z/
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
259 AM CDT Wed Aug 20 2025

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 4 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...Until 4 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.

&&

$$