Peakflow Forecasts Header

SNAKE--BROWNLEE DAM
   State:  Idaho    County:  ADAMS
   Latitude:  44 50' 10" North    Longitude:  116 53' 54" West
   Elevation:  1844 feet
   Supporting WFO:  Boise    
   Inflow Data  

Forecasts are calculated from a forecast time series that approximates flow at a 6 hour time step interval. Observed instantaneous peaks can be higher than model forecast peaks.

SNAKE--BROWNLEE DAM   (BRNI1)
Forecasts for Water Year
2026
Ensemble Date: 2026-01-23
Forecast Period: January 23 to May 1
Exceedence
Probability
Inflow
CFS
Probable
Date of Peak
95 % 19558 2026-02-21
90 % 20620 2026-02-28
70 % 25902 2026-03-20
50 % 30674 2026-04-12
30 % 36527 2026-04-23
10 % 44852 2026-04-28
05 % 56616 2026-04-30

Peakflow exceedence plot for BRNI1

 Click to download runoff traces used in forecast.  Click for comma delimited data used in plot.csv icon