- Date
- 1991-09
- Kind
- Observation
- Where
- Beaver Island archipelago
- Eras
- Modern era
- Concepts
- hydrologyenvironmentmaritimecommunication
- Within
- Beaver Island archipelago
Summary
The October 1991 issue reports Lakes Michigan–Huron at 578.04 feet at the end of September, below the long-term September average and forecast to continue their seasonal decline.
Evidence limits
This is a reprinted regional bulletin, not a Beaver Island shoreline gauge series or hydrologic reanalysis.
Sources
- Reports Lakes Michigan–Huron at 578.04 feet at the end of September, 15 inches above chart datum, about one inch below the prior year, and a monthly mean about four inches below the long-term September average; the forecast expected further decline. The holding institution's portal restricts automated access; the archive holds a copy of this issue and can provide it on request.data1 · beaver-island-archive · beaver_beacon · 1991-10_Beaver-Beacon
- The held nineteen-page issue scan confirms the lake-level report.data1 · beaver-island-archive · scans · beaver_beacon · issues · 1991-10_Beaver-Beacon
Added 4 August 2026. Recent changes
Cite this article
Beaver Island Archive, “Lakes Michigan–Huron fall below the long-term September average, 1991”, https://beaverislandarchive.org/events/great-lakes-michigan-huron-level-september-1991/, accessed [date], citing Beaver Beacon, October 1991, “LAKE LEVELS.” (and 1 further source listed on the page).
Last revised 2026-08-04. Fill in [date] with the date you read it — this page is static and cannot know that.
BibTeX for “Lakes Michigan–Huron fall below the long-term September average, 1991”RIS for “Lakes Michigan–Huron fall below the long-term September average, 1991”