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Small Craft Advisory 0082
Issued by the Chicago Forecast Office

Action Issued Starts Expiration
New 2026-09-18 15:06:54 2026-09-18 22:00:00 2026-09-19 15:00:00
New 2026-09-18 15:06:54 2026-09-18 22:00:00 2026-09-19 15:00:00
Continued 2026-09-18 21:54:36 2026-09-18 22:00:00 2026-09-19 15:00:00
Continued 2026-09-19 03:10:14 2026-09-19 15:00:00
Continued 2026-09-19 09:22:14 2026-09-19 15:00:00
Expired 2026-09-19 14:56:24 2026-09-19 15:00:00


Action: New
Issued At: 2026-09-18 15:06:54

960 
WHUS73 KLOT 182006
MWWLOT

URGENT - MARINE WEATHER MESSAGE
National Weather Service Chicago IL
306 PM CDT Fri Sep 18 2026

LMZ740-190415-
/O.EXP.KLOT.SC.Y.0081.000000T0000Z-260918T2000Z/
/O.NEW.KLOT.SC.Y.0082.260919T0300Z-260919T2000Z/
Winthrop Harbor to Wilmette Harbor IL-
306 PM CDT Fri Sep 18 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM 10 PM THIS EVENING TO 3 PM
CDT SATURDAY...
...PREVIOUS SMALL CRAFT ADVISORY HAS EXPIRED...

* WHAT...Southeast winds to 25 kt and significant waves to 7 ft
  occasionally to 9 ft expected.

* WHERE...Winthrop Harbor to Wilmette Harbor IL.

* WHEN...From 10 PM this evening to 3 PM CDT Saturday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

LMZ741-190415-
/O.NEW.KLOT.SC.Y.0082.260919T0300Z-260919T2000Z/
Wilmette Harbor to Northerly Island IL-
306 PM CDT Fri Sep 18 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM 10 PM THIS EVENING TO 3 PM
CDT SATURDAY...

* WHAT...Southeast winds to 25 kt and significant waves to 7 ft
  occasionally to 9 ft expected.

* WHERE...Wilmette Harbor to Northerly Island IL.

* WHEN...From 10 PM this evening to 3 PM CDT Saturday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$


Action: New
Issued At: 2026-09-18 15:06:54

960 
WHUS73 KLOT 182006
MWWLOT

URGENT - MARINE WEATHER MESSAGE
National Weather Service Chicago IL
306 PM CDT Fri Sep 18 2026

LMZ740-190415-
/O.EXP.KLOT.SC.Y.0081.000000T0000Z-260918T2000Z/
/O.NEW.KLOT.SC.Y.0082.260919T0300Z-260919T2000Z/
Winthrop Harbor to Wilmette Harbor IL-
306 PM CDT Fri Sep 18 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM 10 PM THIS EVENING TO 3 PM
CDT SATURDAY...
...PREVIOUS SMALL CRAFT ADVISORY HAS EXPIRED...

* WHAT...Southeast winds to 25 kt and significant waves to 7 ft
  occasionally to 9 ft expected.

* WHERE...Winthrop Harbor to Wilmette Harbor IL.

* WHEN...From 10 PM this evening to 3 PM CDT Saturday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

LMZ741-190415-
/O.NEW.KLOT.SC.Y.0082.260919T0300Z-260919T2000Z/
Wilmette Harbor to Northerly Island IL-
306 PM CDT Fri Sep 18 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM 10 PM THIS EVENING TO 3 PM
CDT SATURDAY...

* WHAT...Southeast winds to 25 kt and significant waves to 7 ft
  occasionally to 9 ft expected.

* WHERE...Wilmette Harbor to Northerly Island IL.

* WHEN...From 10 PM this evening to 3 PM CDT Saturday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$


Action: Continued
Issued At: 2026-09-18 21:54:36

835 
WHUS73 KLOT 190254
MWWLOT

URGENT - MARINE WEATHER MESSAGE
National Weather Service Chicago IL
954 PM CDT Fri Sep 18 2026

LMZ740-741-191100-
/O.CON.KLOT.SC.Y.0082.260919T0300Z-260919T2000Z/
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
954 PM CDT Fri Sep 18 2026

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 PM CDT
SATURDAY...

* WHAT...Southeast winds to 25 kt and significant waves to 7 ft
  occasionally to 9 ft expected.

* WHERE...Winthrop Harbor to Northerly Island, IL.

* WHEN...Until 3 PM CDT Saturday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$


Action: Continued
Issued At: 2026-09-19 03:10:14

100 
WHUS73 KLOT 190809
MWWLOT

URGENT - MARINE WEATHER MESSAGE
National Weather Service Chicago IL
309 AM CDT Sat Sep 19 2026

LMZ740-741-191615-
/O.CON.KLOT.SC.Y.0082.000000T0000Z-260919T2000Z/
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
309 AM CDT Sat Sep 19 2026

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 PM CDT THIS
AFTERNOON...

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

* WHERE...Winthrop Harbor to Northerly Island IL.

* WHEN...Until 3 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.

&&

$$


Action: Continued
Issued At: 2026-09-19 09:22:14

604 
WHUS73 KLOT 191421
MWWLOT

URGENT - MARINE WEATHER MESSAGE
National Weather Service Chicago IL
921 AM CDT Sat Sep 19 2026

LMZ740-741-192000-
/O.CON.KLOT.SC.Y.0082.000000T0000Z-260919T2000Z/
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
921 AM CDT Sat Sep 19 2026

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 PM CDT THIS
AFTERNOON...

* WHAT...Southeast winds to 20 kt and significant waves to 6 ft 
  occasionally to 8 ft.

* WHERE...Winthrop Harbor to Northerly Island IL.

* WHEN...Until 3 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.

&&

$$


Action: Expired
Issued At: 2026-09-19 14:56:24

025 
WHUS73 KLOT 191956
MWWLOT

URGENT - MARINE WEATHER MESSAGE
National Weather Service Chicago IL
256 PM CDT Sat Sep 19 2026

LMZ740-741-200400-
/O.EXP.KLOT.SC.Y.0082.000000T0000Z-260919T2000Z/
/O.NEW.KLOT.SC.Y.0083.260920T1200Z-260923T0000Z/
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
256 PM CDT Sat Sep 19 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM 7 AM SUNDAY TO 7 PM CDT
TUESDAY...
...PREVIOUS SMALL CRAFT ADVISORY WILL EXPIRE AT 3 PM CDT THIS 
AFTERNOON...

* WHAT...Northeast winds to 30 kt and significant waves to 10 ft
  occasionally to 13 ft expected.

* WHERE...Winthrop Harbor to Northerly Island IL.

* WHEN...From 7 AM Sunday to 7 PM CDT Tuesday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

LMZ742-200400-
/O.NEW.KLOT.SC.Y.0083.260920T1200Z-260923T0000Z/
Northerly Island to Calumet Harbor IL-
256 PM CDT Sat Sep 19 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM 7 AM SUNDAY TO 7 PM CDT
TUESDAY...

* WHAT...Northeast winds to 30 kt and significant waves to 10 ft
  occasionally to 13 ft expected.

* WHERE...Northerly Island to Calumet Harbor IL.

* WHEN...From 7 AM Sunday to 7 PM CDT Tuesday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

LMZ743-744-200400-
/O.NEW.KLOT.SC.Y.0083.260920T1500Z-260923T0000Z/
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
256 PM CDT Sat Sep 19 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM SUNDAY TO 7 PM CDT
TUESDAY...

* WHAT...Northeast winds to 30 kt and significant waves to 7 ft
  occasionally to 9 ft expected.

* WHERE...Calumet Harbor IL to Burns Harbor IN.

* WHEN...From 10 AM Sunday to 7 PM CDT Tuesday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

LMZ745-200400-
/O.NEW.KLOT.SC.Y.0083.260920T1800Z-260921T1200Z/
Burns Harbor to Michigan City IN-
256 PM CDT Sat Sep 19 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM 1 PM SUNDAY TO 7 AM CDT
MONDAY...

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

* WHERE...Burns Harbor to Michigan City IN.

* WHEN...From 1 PM Sunday 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.

&&

$$



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