411
WHUS73 KLOT 092047
MWWLOT

URGENT - MARINE WEATHER MESSAGE
National Weather Service Chicago IL
247 PM CST Tue Dec 9 2025

LMZ744-745-100500-
/O.EXP.KLOT.SC.Y.0110.000000T0000Z-251209T2100Z/
/O.CON.KLOT.GL.W.0030.251210T0300Z-251211T0000Z/
Gary to Burns Harbor IN-Burns Harbor to Michigan City IN-
247 PM CST Tue Dec 9 2025

...GALE WARNING REMAINS IN EFFECT FROM 9 PM THIS EVENING TO 6 PM
CST WEDNESDAY...

* WHAT...Southwest gales to 35 kt becoming northwest to 40 kt
  Wednesday morning and significant waves to 14 ft occasionally to
  18 ft expected.

* WHERE...Gary to Michigan City IN.

* WHEN...From 9 PM this evening to 6 PM CST Wednesday.

* IMPACTS...Strong winds will cause hazardous waves which could
  capsize or damage vessels and reduce visibility.

* ADDITIONAL DETAILS...Snow squalls may accompany the northwest
  wind shift Wednesday morning.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for hazardous conditions.

&&

$$

LMZ740>743-100500-
/O.CON.KLOT.GL.W.0030.251210T0300Z-251210T2100Z/
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
Calumet Harbor IL to Gary IN-
247 PM CST Tue Dec 9 2025

...GALE WARNING REMAINS IN EFFECT FROM 9 PM THIS EVENING TO 3 PM
CST WEDNESDAY...

* WHAT...Southwest gales to 35 kt becoming northwest to 40 kt
  Wednesday morning and significant waves to 10 ft occasionally to
  13 ft expected.

* WHERE...Winthrop Harbor to Calumet Harbor IL, and Calumet
  Harbor IL to Gary IN.

* WHEN...From 9 PM this evening to 3 PM CST Wednesday.

* IMPACTS...Strong winds will cause hazardous waves which could
  capsize or damage vessels and reduce visibility.

* ADDITIONAL DETAILS...Snow squalls may accompany the northwest
  wind shift Wednesday morning.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for hazardous conditions.

&&

$$