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The linked gauge for Stump Lake reported 1451.19 ft at its latest stored observation on Oct 11, 2026, on a falling 30-day trend (-0.12 ft).
Local gage height: 1451.19 ft
-0.12 ft net change over past 30 days
Deepest basin sounding across ~15,700 acres
Brisk (50–60°F) · Cold shock risk · Wetsuit recommended
TOLNA COULEE NEAR TOLNA, ND · Oct 11, 10:00 PM UTC
| Observation Date | Gage height (ft) | 24h Change | Approval Status |
|---|---|---|---|
| Sat, Oct 10, 2026 | 1451.17 | 0.00 ft | Provisional |
| Fri, Oct 9, 2026 | 1451.17 | +1401.21 ft | Provisional |
| Fri, Oct 9, 2026 | 49.96 | -1401.24 ft | Provisional |
| Thu, Oct 8, 2026 | 1451.20 | +1401.21 ft | Provisional |
| Thu, Oct 8, 2026 | 49.99 | -0.01 ft | Provisional |
| Wed, Oct 7, 2026 | 50.00 | -1401.21 ft | Provisional |
| Wed, Oct 7, 2026 | 1451.21 | +0.01 ft | Provisional |
| Tue, Oct 6, 2026 | 1451.20 | +1401.21 ft | Provisional |
| Tue, Oct 6, 2026 | 49.99 | +0.01 ft | Provisional |
| Mon, Oct 5, 2026 | 49.98 | -1401.21 ft | Provisional |
| Mon, Oct 5, 2026 | 1451.19 | +1401.18 ft | Provisional |
| Sun, Oct 4, 2026 | 50.01 | -1401.21 ft | Provisional |
| Sun, Oct 4, 2026 | 1451.22 | +1401.22 ft | Provisional |
| Sat, Oct 3, 2026 | 50.00 | — | Provisional |
Current index calculated from verified local atmospheric, hydrographic & alert inputs.
Very Poor / Avoid for swimming (18/100), from 5 available inputs. Supporting this: No active official alerts for this lake. 29% chance of precipitation. Working against it: Measured water temperature 54°F from a representative gauge 8.6 mi away. Provisional data. Immersion shock hazard: water below 55°F poses severe cold shock and rapid hypothermia risk. Air temperature 48°F. Water temperature is 54°F (below 55°F). Severe cold shock and hypothermia hazard upon immersion. Confidence is high (87%).