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: 2026-06-14
Forecast Period: June 14 to October 1
Exceedence
Probability
Inflow
CFS
Probable
Date of Peak
95 % 11720 2026-08-18
90 % 11810 2026-09-03
70 % 12060 2026-09-29
50 % 12439 2026-10-01
30 % 12955 2026-10-01
10 % 15023 2026-10-01
05 % 18095 2026-10-01

Peakflow exceedence plot for BRNI1

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