Special Marine Warning for Lake Michigan from Winthrop Harbor to Wilmette Harbor IL 5NM offshore to Mid Lake
Official alert fields
What you need to know
- Effective
- Ended
- Official severity
- Severe
- Official urgency
- Immediate
- Official certainty
- Likely
What is happening
For the following areas... Open Waters from Winthrop Harbor to Wilmette Harbor out to Mid Lake... At 1113 PM CDT, a strong thunderstorm was located 14 nm east of Waukegan Harbor, moving east at 20 knots. HAZARD...Wind gusts to 40 knots and small hail. SOURCE...Radar indicated. IMPACT...Small craft could be damaged...
What the bulletin says to do
Move to safe harbor until hazardous weather passes.
Full official description
Bulletin details
For the following areas... Open Waters from Winthrop Harbor to Wilmette Harbor out to Mid Lake... At 1113 PM CDT, a strong thunderstorm was located 14 nm east of Waukegan Harbor, moving east at 20 knots. HAZARD...Wind gusts to 40 knots and small hail. SOURCE...Radar indicated. IMPACT...Small craft could be damaged in briefly higher winds and suddenly higher waves. The strong thunderstorm will remain over mainly open waters.
Lifecycle record
Official revisions
- Update
Special Marine Warning issued September 4 at 11:14PM CDT until September 5 at 12:00AM CDT by NWS Chicago IL
Official revision - Alert
Special Marine Warning issued September 4 at 10:26PM CDT until September 5 at 12:00AM 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