National Water and Climate Center's Interactive Map

USDA Current Conditions Maps

USDA Montana Water Supply Outlook Reports

USDA Daily Guidance Streamflow Forecasts Using SNOTEL Data

DNRC's Water Sciences Bureau generates long range (3 or 4 month) water supply forecasts for various stream gage sites. These forecasts use similar methods as the NRCS national water supply forecasts but are issued at locations where NRCS forecasts are not available. DNRC's forecasts predict the water supply from snowmelt only and represent rainfall as potential scenarios instead of attempting to predict future rainfall. The volumetric forecasts are issued in Mid- March, April and May with updated snow water equivalent (SWE) and precipitation values as they are reported.

Long range water supply forecast for the Teton River at the USGS Gage #06102500 Teton River below South Fork near Choteau. 

View the Upper Teton Water Supply Forecast Documentation

This forecast is in cooperation with the Confederated Salish & Kootenai Tribes (CSKT) Water Resources Program.

Long range water supply forecast for Post Creek at the CSKT Gage #486000 Post Creek above McDonald Reservoir.