June 30, 2013
Current Koocanusa Reservoir elevation: 2,444.6 feet
Current Koocanusa Reservoir inflow: ~34,000 cubic feet per second
Current Libby Dam outflow: 17,000 cfs
Current Kootenai River elevation at Bonners Ferry: 1,754.7 feet
Libby Dam outflow is 17,000 cfs, that rate will be reduced to 15,000 cfs just after midnight Wednesday. This reduction is to manage refill. This release will likely be held through 4th of July weekend. Throughout the refill season regulators will be closely monitoring weather and snowpack conditions, river conditions above and below Libby Dam, and the stage at Bonners Ferry, Idaho.
The June water supply forecast was issued June 4th. It forecasted April-through-August inflow into Koocanusa Reservoir to be 7.074 million-acre-feet, which is 120% of normal. The May forecast set the summer Bull Trout minimum to 9,000 cfs.
The Northwest River Forecast Center creates daily forecasts for short term projections throughout the Kootenai and Columbia River Basins. These forecasts can be updated multiple times in a day and can be updated at anytime as conditions change. Links to those projections can be found below:
Short term forecasts for Libby Dam elevations and inflows can be found here:
Short term forecasts for Libby Dam releases can be found here:
Short term forecasts for Bonners Ferry can be found here:
Please note the National Weather Service's disclaimer on forecasts after 3 days. All forecasts and model projections are based on the best information at the current time, as the weather changes so will the short and long-term predictions.
Libby Dam Operations and associated probabilities for Libby Dam and Bonners Ferry for this spring and summer can be found here:
These modeling results are updated at least weekly and include information on elevations, outflow, and Bonners Ferry seasonal elevation and peak height for the year. Key pieces of information on these plots include things like:
Page 1 shows Lake Koocanusa elevation probability through the summer.
Page 2 shows Libby Dam Outflow probability through the summer.
Page 3 shows Lake Koocanusa elevation probability for a given date.
Page 4 shows Libby Dam Spill probability through the summer.
Page 5 shows Bonners Ferry Stage probability through the summer.
Page 6 shows Bonners Ferry peak stage probability for the year.
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