The Inseason Forecasts tool uses "real time" information about the current status of various Columbia Basin juvenile and adult salmon runs along with current hydrographic information to predict the future progress of the migrating fish. The Inseason Forecasts predictions are available for the following categories.
Smolt Passage
PIT Tag stocks at Lower Granite, Little Goose, Lower Monumental, Ice Harbor, and McNary dams
Arrival distributions, historical timing, transport, and survival
for various Snake River yearling chinook, steelhead, subyearling chinook and
sockeye stocks. Forecasts are based on PIT Tag detections at Lower Granite
Dam.
Current Predictions: 19 September 2021
Passage Index at Rock Island, Lower Granite, McNary, John Day, and Bonneville dams
Arrival distributions and historical timing for combined stocks
of yearling chinook, steelhead, subyearling chinook, sockeye, and coho. Forecasts are based on Passage Index
data
at each dam, individually.
Current Predictions: 19 September 2021
Chelan Passage Counts at Rocky Reach Dam
Arrival distributions and historical timing for yearling chinook, steelhead,
subyearling chinook, and sockeye. Forecasts are based on Chelan PUD passage counts
at Rocky Reach Dam.
Current Predictions: 31 August 2021
PIT Tag ESU stocks at at McNary, John Day, The Dalles, and Bonneville dams
Arrival distributions, historical timing, and survival for specific Snake
River and Upper Columbia River ESU stocks. Forecasts are based on selected PIT Tag detections at McNary
Dam.
Current Predictions: 19 September 2021
Adult Passage
Adult Passage stocks at Bonneville and upstream dams
Arrival distributions and total run size for spring and fall adult chinook at Bonneville Dam.
Arrival distributions are forecasted to upstream dams for four stocks: Snake River, Upper Columbia
River, Lower Columbia River, and Hanford Reach/Yakima. Forecasts are based on visual adult passage
counts at Bonneville
Dam.
Current Predictions: 19 September 2021
Water Quality
Water Temperature and Total Dissolved Gas
Water temperature and total dissolved gas percent at various dams in
the Columbia and Snake rivers. Forecasts are based on observed temperature and
total dissolved gas percent data at each location.
Current Predictions: 16 September 2021