FLBS LakeNet Weather Network

FLBS Weather Station
FLBS Environmental Buoy

FLBS has been collecting weather data since 1938. In 2009, FLBS was awarded a NSF EPSCoR grant that added telemetered above-water environmental sensors and subsurface buoy-based profilers to the existing weather data collection.

In addition to its scientific contributions, LakeNET weather and water data has seen regular use by lake recreationists, fishermen, shoreline homeowners, pilots, local agencies and even farmers. In fact, our most recent request for LakeNET weather data was from a viticulturist experimenting with cold climate grapes.  And the National Weather Service routinely uses our data in their predictive models for wind and wave conditions and their issuance of small craft advisories on local lakes.

FLBS environmental data is updated every 15 minutes.  Subsurface conditions are updated every 3 hours.  

Exclamation point image The FLBS Sensor Network is entirely supported by grants and donations. Please consider a small donation to keep it free and available.


Select a Site
Image map of Flathead Lake weather stations Yellow Bay Hill Yellow Bay Point East Shore Midlake Deep Buoy Narrows West Shore Midlake North Buoy North Shore Somers
FLBS Hill1:15p38.9 F80.6 %30.0 in Hg1.8 mph ESE0.00 in
West Shore1:15p38.0 F83.3 %30.1 in Hg0.0 mph W0.00 in
YB Point1:15p39.5 F38.2 F2.7 mph WNW
East Shore1:15p56.0 F37.5 %30.1 in Hg2.6 mph NNE0.00 in
Narrows1:15p40.5 F52.6 F30.1 in Hg3.7 mph SSW
Somers12:00p34.8 F42.2 F30.1 in Hg2.4 mph E
North Shore11:30a32.0 F32.4 F30.1 in Hg4.7 mph NW

* 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.
* Note: 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 .




Lake Profiler Subsurface Data Graphs

FL Buoy
1. Select a Site:

and 2. 
3. Multi-Day Variables

LMP Units Description
Temp (°C) = temperature in degrees Centigrade
O2 (mg L-1) = dissolved oxygen in milligrams per liter
O2 (% sat) = percent saturation of dissolved oxygen
Chl (rel. fluor.) = chlorophyll as relative fluorescence units
CDOM (µg L-1) = colored dissolved organic matter in micrograms per liter
Turbidity (β(117°, 700 nm) m-1 sr-1) = volume scattering coefficients, β(θ,y)
with units of m-1 sr-1, where θ is angle and y is wavelength.
Cond (µmhos cm-1) = specific conductance in micromhos per centimeter
PAR (µE m-2 s-1) = photosynthetically active radiation in microeinsteins per square meter per second


Lake Surface Temperature

38.2°F at 1:15 PM on 1/26/2015

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.

Note that surface water temperature sensor readings are only available when the lake is at or near full pool (roughly May - September).


Lake Surface Level, Conditions, and Forecasts

Today's lake level is: 2886.48 feet

The Flathead Lake water level value is provided by the USGS Water Data site, whose gauging station is located on Salish Point near Polson, MT. Data is read in RDB format here.

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.

Related Resources

US Army Corps:

Lake flows and elevation info popup window icon


Lake surface conditions forecast popup window icon
Lake level forecast popup window icon


Page Updated: 1/22/2015 10:51 am

© 2015 FLBS, UM

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