FLBS Environmental Buoy
In the early 1900s, FLBS founder Dr. Morton Elrod established Montana’s first weather station in his backyard in Missoula. FLBS has been collecting weather data ever since, with daily manual readings at our Yellow Bay location for the National Weather Service going back to 1938.
In 2011, FLBS enhanced weather data collection and accessibility through the deployment of LakeNET, a telemetered network of environmental weather and water quality sensors. Weather sensors are mounted on land and buoy-based towers while water quality profilers are mounted below the buoys and travel from the bottom to near the surface of the lake multiple times each day.
Data from LakeNET’s environmental sensors has greatly increased understanding of Flathead Lake’s biological and physical processes and is currently being used in concert with our long-term physical and chemical measurements to drive a nutrient-food web model for Flathead Lake.
The National Weather Service routinely uses our data in their predictive models for Flathead Lake wind and wave conditions and their issuance of small craft advisories.
FLBS weather data is updated every 15 minutes. Water conditions are updated every 3 hours.
The FLBS Sensor Network is entirely supported by grants and donations. Please consider a small donation to keep it free and available.
The FLBS buoys off Woods Bay Point and Yellow Bay point are down for maintenance. They may be redeployed dependent on funding. If you have any questions, contact us
Select a Site
|FLBS Hill||5:15a||54.0 F||57.6 %||30.1 in Hg||6.2 mph E||0.00 in
|West Shore||5:15a||49.4 F||74.7 %||30.1 in Hg||3.1 mph W||0.00 in
|YB Point||5:15a||52.8 F||46.7 F||5.6 mph NE||
|East Shore||5:15a||48.7 F||66.7 %||30.1 in Hg||1.0 mph ESE||0.00 in
|Narrows||5:00a||52.6 F||51.9 F||30.1 in Hg||6.7 mph NNW||
|Somers||5:15a||48.0 F||47.1 F||30.0 in Hg||3.9 mph NNW||
* Mouseover for site location. Click for additional site weather info.
* A blank row indicates that data has not been collected for the current day. A blank field indicates that variable is not available for the site.
Met Station on Yellow Bay hill
(Graphs open in a popup window)
Lake Surface Temperature
46.7°F at 5:15 AM on 5/24/2015
The Flathead Lake surface water temperature reading is measured at the end of Yellow Bay Point. As one of the measurements in the Flathead Lake environmental data suite, temperature is reported every 15 minutes.
Lake Surface Level, Conditions, and Forecasts
Today's lake level is: 2890.20 feet
The Flathead Lake water level value is provided by the US Geological
Survey, whose gauging station is located on Salish Point near Polson, MT. Data is read in RDB format.
Kerr Dam, at the lake outlet in Polson, regulates outflow to maintain Flathead Lake's level between 2,883 and 2,893 feet above sea level. If runoff conditions in the mountains don't warrant flood threats, the lake's level is brought to 2,890 feet by the end of May and to full pool by June 15.