BOISE − NR TWIN SPRINGS (BTSI1)
   State:  Idaho
   County:  Ada
   Latitude:  43 39' 33" North
   Longitude:  115 43' 34" West
   Elevation:  3256 ft

   Supporting NWS Forecast Office: WFO Boise

   
Click for NWS Official River Forecasts for BTSI1
   

Daily Historical Statistics for May 15, 2026
Mean Stage: 9.36 ft  Mean Flow: 3930 cfs
Max Stage: 12.35 ft  Max Flow: 10000 cfs (2011)
Min Stage:  6.18 ft   Min Flow: 738 cfs (1977)

Statistics based on water years: 1911-2025
* statistics estimated based on current rating

Record Stage: 
13.84 ft

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

Hydrograph plot for BTSI1

Data Used In Plot   "label   USBR Observations   


Hydrograph plot for BTSI1

Data Used In Plot   "label   USBR Observations