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The linked gauge for Lake Superior - Minnesota North Shore reported 601.98 ft (relative to IGLD 1985) at its latest stored observation on Oct 9, 2026, on a falling 30-day trend (-0.29 ft).
Small Craft Advisory issued October 8 at 9:52PM CDT until October 9 at 10:00PM CDT by NWS Duluth MN
Local gage height: 601.98 ft
-0.29 ft net change over past 30 days
Deepest basin sounding across ~20,300,000 acres
Brisk (50–60°F) · Cold shock risk · Wetsuit recommended
Duluth, MN · Oct 9, 5:48 AM UTC
| Observation Date | Gage height (ft) | 24h Change | Approval Status |
|---|---|---|---|
| Thu, Oct 8, 2026 | 601.91 | -0.02 ft | Provisional |
| Wed, Oct 7, 2026 | 601.93 | -0.26 ft | Provisional |
| Tue, Oct 6, 2026 | 602.19 | +0.14 ft | Provisional |
| Mon, Oct 5, 2026 | 602.05 | +0.10 ft | Provisional |
| Sun, Oct 4, 2026 | 601.96 | -0.26 ft | Provisional |
| Sat, Oct 3, 2026 | 602.22 | +0.20 ft | Provisional |
| Fri, Oct 2, 2026 | 602.01 | -0.06 ft | Provisional |
| Thu, Oct 1, 2026 | 602.07 | -0.14 ft | Provisional |
| Wed, Sep 30, 2026 | 602.21 | -0.06 ft | Provisional |
| Tue, Sep 29, 2026 | 602.27 | +0.06 ft | Provisional |
| Mon, Sep 28, 2026 | 602.21 | -0.05 ft | Provisional |
| Sun, Sep 27, 2026 | 602.27 | -0.06 ft | Provisional |
| Sat, Sep 26, 2026 | 602.33 | +0.06 ft | Provisional |
| Fri, Sep 25, 2026 | 602.26 | — | Provisional |
Current index calculated from verified local atmospheric, hydrographic & alert inputs.
Very Poor / Avoid for swimming (32/100), from 5 available inputs. Supporting this: 0% chance of precipitation. Wind 5 mph from the west. Working against it: Measured water temperature 57°F from a representative gauge 1.1 mi away. Cold water hazard: thermal protection recommended below 60°F. Air temperature 52°F. Water temperature is 57°F (below 60°F). Immersion requires thermal protection. Confidence is moderate (80%) because some inputs are unavailable or older than ideal.