Special Marine Warning for St Joseph to South Haven MI; Lake Michigan from St Joseph to South Haven MI 5NM offshore to Mid Lake
Official alert fields
What you need to know
- Applies to
- Lake Michigan from St Joseph to South Haven MI 5NM offshore to Mid Lake, St Joseph to South Haven MI
- Effective
- Ends or expires
- Official severity
- Severe
- Official urgency
- Immediate
- Official certainty
- Likely
What is happening
SMWGRR The National Weather Service in Grand Rapids has issued a * Special Marine Warning for... Nearshore and Open Waters from St Joseph to South Haven MI... * Until 145 AM EDT. * At 1210 AM EDT, a strong thunderstorm was located 9 nm southwest of South Haven Light, moving east at 20 knots. Additional strong...
What the bulletin says to do
Frequent lightning is occurring with this storm. If caught on the open water stay below deck if possible, keep away from ungrounded metal objects.
Full official description
Bulletin details
SMWGRR The National Weather Service in Grand Rapids has issued a * Special Marine Warning for... Nearshore and Open Waters from St Joseph to South Haven MI... * Until 145 AM EDT. * At 1210 AM EDT, a strong thunderstorm was located 9 nm southwest of South Haven Light, moving east at 20 knots. Additional strong thunderstorms were located at mid lake, roughly 40 miles west of the South Haven Light. These storms were also moving east at 20 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. * Locations impacted include... South Haven Light, St. Joseph Light, and St. Joseph.
Official geometry where available
Alert boundary
Lifecycle record
Official revisions
- Alert
Special Marine Warning issued September 5 at 12:12AM EDT until September 5 at 1:45AM EDT by NWS Grand Rapids MI
Official revision
Source and limitations
Publisher: Weather Alert Watch. Primary source: NWS Grand Rapids MI. This page reorganizes official fields and does not add a forecast or expand the affected area.
- CAP status
- Actual
- Message type
- Alert
- Last collected