Streamflow Forecasts

Northern Water’s Snowpack and Streamflow Comparisons reports show snow-water content comparisons and streamflow forecasts for the watersheds in the Colorado-Big Thompson Project. Northern Water publishes the reports on this page from the beginning of February through the beginning of May. Go to the SnoWatch Snowpack Data page for snowpack data from remote Snowpack Telemetry (SNOTEL) platforms in eight watersheds, covering an area from west of Loveland, CO to east of Kremmling, CO.

 Colorado SNOTEL Statewide Snowpack Map
 Colorado Snowpack Update – All State River Basins

February 2020 Streamflow Forecast*
February 1 snowpack is at or above average in most basins except for Willow Creek. Streamflow forecasts are generally a bit lower than we would normally expect with these snowpack conditions due to the impacts of the hot and dry conditions in late summer 2019 on soil moisture. The forecast for most basins is around 90-100% of average, though Willow Creek is lower due to the lower snowpack. Learn more>>

March 2020 Streamflow Forecast*
March 1 snowpack was above average in all basins. All basins
have seen a significant increase in snowpack since February 1, so the streamflow forecasts have also increased in all basins. The forecasts range from 103% of average in the Upper Colorado to 114% of average in the Fraser. Learn more>>

April 2020 Streamflow Forecast*
April 1 snowpack was above average in all basins. All April 1 forecasts are the same as or slightly lower than the March 1 forecasts, due to slightly lower than average March snowfall in the mountains. The forecasts range from 101% of average in the Upper Colorado to 109% of average in the Big Thompson. Learn more>>

May 2020 Streamflow Forecast*
The May 1 forecasts remained the same as April 1, but the
Poudre and Big Thompson forecasts decreased slightly due to below-average April precipitation. The forecasts range from 101% of average in the Upper Colorado to 107% of average in the Big Thompson. Learn more>>



* A small note that our Upper Colorado River and South Platte
Tributaries snow water equivalent values are weighted differently from NRCS values, effecting the percent of average calculations.




Winter at Pinewood Reservoir