SNAKE − BELOW SWAN FALLS (SWAI1)
   State:  Idaho
   County:  Ada
   Latitude:  43 17' 30" North
   Longitude:  116 25' 12" West
   Elevation:  2271 ft

   Supporting NWS Forecast Office: WFO Boise

   
Click for NWS Official River Forecasts for SWAI1
Daily Historical Statistics for December 24, 2025
Mean Stage: 24.23 ft  Mean Flow: 10900 cfs
Max Stage: 33.31 ft  Max Flow: 35000 cfs (1965)
Min Stage:  20.75 ft   Min Flow: 6380 cfs (2022)

Statistics based on water years: 1914-2025
* statistics estimated based on current rating

The 4-10 Day Trend Forecast is based on model guidance and uncertainty during this period is greater.

Hydrograph plot for SWAI1


For Data Used In Plot   "label