WHUS73 KLOT 211412

MWWLOT



URGENT - MARINE WEATHER MESSAGE

National Weather Service Chicago IL

912 AM CDT Tue Apr 21 2026



LMZ741-742-212100-

/O.CON.KLOT.SC.Y.0047.000000T0000Z-260421T2100Z/

Wilmette Harbor to Northerly Island IL-

Northerly Island to Calumet Harbor IL-

912 AM CDT Tue Apr 21 2026



...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 4 PM CDT THIS

AFTERNOON...



* WHAT...Southwest winds to 25 kt expected.



* WHERE...Wilmette Harbor to Calumet Harbor IL.



* WHEN...From 9 AM this morning to 4 PM CDT this afternoon.



* 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>745-212215-

/O.CON.KLOT.SC.Y.0047.000000T0000Z-260422T0000Z/

Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-

Burns Harbor to Michigan City IN-

912 AM CDT Tue Apr 21 2026



...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT THIS

EVENING...



* WHAT...Southwest winds to 25 kt expected.



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



* WHEN...From 9 AM this morning to 7 PM CDT this evening.



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



PRECAUTIONARY/PREPAREDNESS ACTIONS...



Inexperienced mariners, especially those operating smaller

vessels, should avoid navigating in hazardous conditions.



&&



$$