Special Marine Warning for Northerly Island to Calumet Harbor IL; Calumet Harbor IL to Gary IN; Gary to Burns Harbor IN +2 more
Official alert fields
What you need to know
- Applies to
- Burns Harbor to Michigan City IN, Calumet Harbor IL to Gary IN, Gary to Burns Harbor IN, Lake Michigan from Wilmette Harbor to Michigan City in 5NM offshore to Mid Lake, Northerly Island to Calumet Harbor IL
- Effective
- Ended
- Official severity
- Severe
- Official urgency
- Immediate
- Official certainty
- Likely
What is happening
The affected areas were... Nearshore Waters from Northerly Island to Calumet Harbor... Nearshore Waters from Calumet Harbor to Michigan City... Open Waters from Wilmette Harbor to Michigan City out to Mid Lake... The thunderstorms have weakened and continue to make their way out of the warned area. Heavy rain and...
What the bulletin says to do
No separate action instruction was included in this NWS record. Read the complete official bulletin and follow local authorities.
Full official description
Bulletin details
The affected areas were... Nearshore Waters from Northerly Island to Calumet Harbor... Nearshore Waters from Calumet Harbor to Michigan City... Open Waters from Wilmette Harbor to Michigan City out to Mid Lake... The thunderstorms have weakened and continue to make their way out of the warned area. Heavy rain and lightning will remain a threat until the storms have moved entirely out of the warned area. A Severe Thunderstorm Watch remains in effect until 400 PM CDT for northeastern Illinois...and the adjacent waters of Lake Michigan.
Lifecycle record
Official revisions
- Update
Special Marine Warning issued August 9 at 3:41PM CDT until August 9 at 3:45PM CDT by NWS Chicago IL
Official revision - Update
Special Marine Warning issued August 9 at 3:20PM CDT until August 9 at 3:45PM CDT by NWS Chicago IL
Official revision - Update
Special Marine Warning issued August 9 at 2:57PM CDT until August 9 at 3:45PM CDT by NWS Chicago IL
Official revision - Update
Special Marine Warning issued August 9 at 2:25PM CDT until August 9 at 3:45PM CDT by NWS Chicago IL
Official revision - Alert
Special Marine Warning issued August 9 at 12:53PM CDT until August 9 at 3:45PM CDT by NWS Chicago IL
Official revision
Source and limitations
Publisher: Weather Alert Watch. Primary source: NWS Chicago IL. This page reorganizes official fields and does not add a forecast or expand the affected area.
- CAP status
- Actual
- Message type
- Update
- Last collected