SNAKE − AT AMERICAN FALLS DAM (AMFI1)
   State:  Idaho
   County:  Power
   Latitude:  42 46' 6" North
   Longitude:  112 52' 42" West
   Elevation:  4212 ft

   Supporting NWS Forecast Office: WFO Pocatello

   
Click for NWS Official River Forecasts for AMFI1
   


   Action Stage:  
8.9 ft
   Flood Stage:  
9.5 ft
Daily Historical Statistics for October 31, 2026
Mean Stage: 4.08 ft  Mean Flow: 2500 cfs
Max Stage: 6.83 ft  Max Flow: 14400 cfs (1985)
Min Stage:  1.35 ft   Min Flow: 51 cfs (1942)

Statistics based on water years: 1927-2025
* statistics estimated based on current rating

Record Stage: 
11.46 ft

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

Hydrograph plot for AMFI1

Data Used In Plot   "label   USBR Observations