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 July 11, 2026
Mean Stage: 6.51 ft  Mean Flow: 12800 cfs
Max Stage: 7.99 ft  Max Flow: 21100 cfs (2011)
Min Stage:  5.45 ft   Min Flow: 7790 cfs (1934)

Statistics based on water years: 1927-2024
* 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