Peakflow Forecasts Header

SF BOISE--NR FEATHERVILLE
   State:  Idaho    County:  ELMORE
   Latitude:  43 29' 39" North    Longitude:  115 18' 20" West
   Elevation:  4220 feet
   Supporting WFO:  Boise    
   Action Stage:  6'   Flood Stage:  7.2'

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.

SF BOISE--NR FEATHERVILLE   (BRFI1)
Forecasts for Water Year
2026
Ensemble Date: 2026-09-03
Forecast Period: September 3 to January 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 1.57 163 2026-09-18
90 % 1.58 165 2026-09-30
70 % 1.59 168 2026-10-19
50 % 1.60 171 2026-11-01
30 % 1.80 236 2026-11-14
10 % 2.61 657 2026-12-19
05 % 2.74 748 2026-12-26

Peakflow exceedence plot for BRFI1

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