Sep-22-2026_Lake-Data

Overall, the water year runoff into Flathead Lake was above normal. Warm, wet weather in March and April caused an early runoff and refill of the lake. Flood Risk Management levels were coordinated closely with the U.S. Army Corps of Engineers due to the multiple high...

Feb-2-2026_Lake-Data

January was incredibly dry in the basin and snowpack in the Flathead is low. However, there are still snow building months ahead. Both weather and streamflows are highly uncertain. A warm and rainy event can rapidly increase streamflows in the spring, and similarly a...

August-25-2025_Lake-Data

The water supply forecasts did not change much this week. The streamflow forecast for this week (subject to change) estimates that the lake will remain in the top 12 inches through August 28 and dip slightly below to near 1.2 ft below full pool on Labor Day. SKQ...

August-17-2025_Lake-Data

Please be aware the Flathead Lake USGS gauge has malfunctioned and the USGS has been notified. The streamflow forecast for this week (subject to change) estimates that the lake will remain in the top 12 inches through August 26 and dip slightly below to near 1.2 ft...

July-29-2025_Lake-Data

Precipitation in July has been nearly 300% of normal. The streamflow forecast for this week (subject to change) estimates that the lake will remain in the top 12 inches through most of August. SKQ project outflows and the Flathead Lake elevation are dependent on many...