Special Marine Warning for Lake Superior East of a line from Manitou Island to Marquette MI and West of a line from Grand Marais MI to the US/Canadian Border Beyond 5NM from shore; Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border
Official alert fields
What you need to know
- Applies to
- Lake Superior East of a line from Manitou Island to Marquette MI and West of a line from Grand Marais MI to the US/Canadian Border Beyond 5NM from shore, Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border
- Effective
- Ended
- Official severity
- Severe
- Official urgency
- Immediate
- Official certainty
- Likely
What is happening
The affected areas were... Lake Superior East of a line from Manitou Island to Marquette MI and West of a line from Grand Marais MI to the US/Canadian Border Beyond 5NM from shore... Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border... The thunderstorm has moved out of...
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... Lake Superior East of a line from Manitou Island to Marquette MI and West of a line from Grand Marais MI to the US/Canadian Border Beyond 5NM from shore... Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border... The thunderstorm has moved out of the area and no longer poses a significant threat to boaters.
Lifecycle record
Official revisions
- Update
Special Marine Warning issued July 20 at 6:36PM EDT until July 20 at 6:45PM EDT by NWS Marquette MI
Official revision - Update
Special Marine Warning issued July 20 at 6:12PM EDT until July 20 at 6:45PM EDT by NWS Marquette MI
Official revision - Update
Special Marine Warning issued July 20 at 5:58PM EDT until July 20 at 6:45PM EDT by NWS Marquette MI
Official revision - Alert
Special Marine Warning issued July 20 at 5:42PM EDT until July 20 at 6:45PM EDT by NWS Marquette MI
Official revision
Source and limitations
Publisher: Weather Alert Watch. Primary source: NWS Marquette MI. This page reorganizes official fields and does not add a forecast or expand the affected area.
- CAP status
- Actual
- Message type
- Update
- Last collected