Watches, Warnings & Advisories



4 products issued by NWS for: 5NM ENE Chicago IL

Gale Warning

URGENT - MARINE WEATHER MESSAGE
National Weather Service Chicago IL
914 PM CDT Thu Mar 12 2026

LMZ740>745-131015-
/O.CON.KLOT.GL.W.0012.260313T0300Z-260313T0900Z/
/O.CON.KLOT.SR.W.0001.260313T0900Z-260313T2100Z/
/O.CON.KLOT.GL.W.0013.260313T2100Z-260314T0300Z/
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
914 PM CDT Thu Mar 12 2026

...GALE WARNING REMAINS IN EFFECT UNTIL 4 AM CDT FRIDAY...
...STORM WARNING REMAINS IN EFFECT FROM 4 AM TO 4 PM CDT FRIDAY...
...GALE WARNING REMAINS IN EFFECT FROM 4 PM TO 10 PM CDT FRIDAY...

* WHAT...For the first Gale Warning, southwest winds to 45 kt
  and significant waves to 8 ft occasionally to 10 ft expected.
  For the Storm Warning, west winds to 50 kt and significant
  waves to 11 ft occasionally to 14 ft expected. For the second
  Gale Warning, northwest winds to 45 kt and significant waves
  to 6 ft occasionally to 8 ft expected.

* WHERE...Illinois and Indiana nearshore from Winthrop Harbor IL
  to Michigan City IN.

* WHEN...For the first Gale Warning, from 10 PM this evening to
  4 AM CDT Friday. For the Storm Warning, from 4 AM to 4 PM CDT
  Friday. For the second Gale Warning, from 4 PM to 10 PM CDT
  Friday.

* IMPACTS...Storm force winds and hazardous waves will capsize
  or damage vessels and reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should remain in port, alter course, and/or secure the
vessel for severe conditions.

&&

$$




Gale Warning

URGENT - MARINE WEATHER MESSAGE
National Weather Service Chicago IL
914 PM CDT Thu Mar 12 2026

LMZ740>745-131015-
/O.CON.KLOT.GL.W.0012.260313T0300Z-260313T0900Z/
/O.CON.KLOT.SR.W.0001.260313T0900Z-260313T2100Z/
/O.CON.KLOT.GL.W.0013.260313T2100Z-260314T0300Z/
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
914 PM CDT Thu Mar 12 2026

...GALE WARNING REMAINS IN EFFECT UNTIL 4 AM CDT FRIDAY...
...STORM WARNING REMAINS IN EFFECT FROM 4 AM TO 4 PM CDT FRIDAY...
...GALE WARNING REMAINS IN EFFECT FROM 4 PM TO 10 PM CDT FRIDAY...

* WHAT...For the first Gale Warning, southwest winds to 45 kt
  and significant waves to 8 ft occasionally to 10 ft expected.
  For the Storm Warning, west winds to 50 kt and significant
  waves to 11 ft occasionally to 14 ft expected. For the second
  Gale Warning, northwest winds to 45 kt and significant waves
  to 6 ft occasionally to 8 ft expected.

* WHERE...Illinois and Indiana nearshore from Winthrop Harbor IL
  to Michigan City IN.

* WHEN...For the first Gale Warning, from 10 PM this evening to
  4 AM CDT Friday. For the Storm Warning, from 4 AM to 4 PM CDT
  Friday. For the second Gale Warning, from 4 PM to 10 PM CDT
  Friday.

* IMPACTS...Storm force winds and hazardous waves will capsize
  or damage vessels and reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should remain in port, alter course, and/or secure the
vessel for severe conditions.

&&

$$




Storm Warning

URGENT - MARINE WEATHER MESSAGE
National Weather Service Chicago IL
914 PM CDT Thu Mar 12 2026

LMZ740>745-131015-
/O.CON.KLOT.GL.W.0012.260313T0300Z-260313T0900Z/
/O.CON.KLOT.SR.W.0001.260313T0900Z-260313T2100Z/
/O.CON.KLOT.GL.W.0013.260313T2100Z-260314T0300Z/
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
914 PM CDT Thu Mar 12 2026

...GALE WARNING REMAINS IN EFFECT UNTIL 4 AM CDT FRIDAY...
...STORM WARNING REMAINS IN EFFECT FROM 4 AM TO 4 PM CDT FRIDAY...
...GALE WARNING REMAINS IN EFFECT FROM 4 PM TO 10 PM CDT FRIDAY...

* WHAT...For the first Gale Warning, southwest winds to 45 kt
  and significant waves to 8 ft occasionally to 10 ft expected.
  For the Storm Warning, west winds to 50 kt and significant
  waves to 11 ft occasionally to 14 ft expected. For the second
  Gale Warning, northwest winds to 45 kt and significant waves
  to 6 ft occasionally to 8 ft expected.

* WHERE...Illinois and Indiana nearshore from Winthrop Harbor IL
  to Michigan City IN.

* WHEN...For the first Gale Warning, from 10 PM this evening to
  4 AM CDT Friday. For the Storm Warning, from 4 AM to 4 PM CDT
  Friday. For the second Gale Warning, from 4 PM to 10 PM CDT
  Friday.

* IMPACTS...Storm force winds and hazardous waves will capsize
  or damage vessels and reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should remain in port, alter course, and/or secure the
vessel for severe conditions.

&&

$$




Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
317 PM CDT Thu Mar 12 2026

LMZ740>745-132030-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
317 PM CDT Thu Mar 12 2026

This Hazardous Weather Outlook is for portions of the Illinois
nearshore waters of Lake Michigan and the Indiana nearshore
waters of Lake Michigan.

.DAY ONE...Tonight.

Weather hazards expected...

  Storm force winds and or extremely hazardous waves.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Friday...
  Storm force winds and extremely hazardous waves.
Saturday...
  Hazardous conditions for small craft are likely.
Sunday...
  Hazardous conditions for small craft are likely.
  Limited Thunderstorm Risk.
Monday and Tuesday...
  Hazardous conditions for small craft are likely.

$$

KJB

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