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
SMWLOT The National Weather Service in Chicago has issued a * Special Marine Warning for... Open Waters from Winthrop Harbor to Wilmette Harbor out to Mid Lake... * Until 1230 AM CDT. * At 1112 PM CDT, strong thunderstorms were located along a line extending from 26 nm northwest of St. Joseph Light to 11 nm east of...
What the bulletin says to do
Move to safe harbor until hazardous weather passes. Frequent lightning is occurring with these storms. If caught on the open water stay below deck if possible, keep away from ungrounded metal objects.
Full official description
Bulletin details
SMWLOT The National Weather Service in Chicago has issued a * Special Marine Warning for... Open Waters from Winthrop Harbor to Wilmette Harbor out to Mid Lake... * Until 1230 AM CDT. * At 1112 PM CDT, strong thunderstorms were located along a line extending from 26 nm northwest of St. Joseph Light to 11 nm east of Waukegan Harbor, moving east at 25 knots. HAZARD...Wind gusts to 40 knots and small hail. SOURCE...Radar. IMPACT...Small craft could be damaged in briefly higher winds and suddenly higher waves. * Strong thunderstorms will remain over mainly open waters.
Lifecycle record
Official revisions
- Alert
Special Marine Warning issued September 4 at 11:12PM CDT until September 5 at 12:30AM 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
- Alert
- Last collected