Peakflow Forecasts Header

BOISE--NR TWIN SPRINGS
   State:  Idaho    County:  ADA
   Latitude:  43 39' 33" North    Longitude:  115 43' 34" West
   Elevation:  3256 feet
   Supporting WFO:  Boise    

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.

BOISE--NR TWIN SPRINGS   (BTSI1)
Forecasts for Water Year
2027
Ensemble Date: 2026-10-10
Forecast Period: October 10 to February 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 5.22 292 2026-10-10
90 % 5.22 292 2026-10-10
70 % 5.70 494 2026-11-11
50 % 6.06 681 2026-12-05
30 % 6.96 1275 2026-12-31
10 % 9.26 3780 2027-01-24
05 % 9.99 4948 2027-01-30

Peakflow exceedence plot for BTSI1

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