Peakflow Forecasts Header

SF BOISE--ANDERSON RANCH DAM
   State:  Idaho    County:  ELMORE
   Latitude:  43 21' 30" North    Longitude:  115 26' 44" West
   Elevation:  3880 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.

SF BOISE--ANDERSON RANCH DAM   (ARAI1)
Forecasts for Water Year
2025
Ensemble Date: 2025-07-11
Forecast Period: July 11 to November 1
Exceedence
Probability
Inflow
CFS
Probable
Date of Peak
95 % 425 2025-07-11
90 % 425 2025-07-11
70 % 430 2025-08-04
50 % 476 2025-09-23
30 % 552 2025-10-15
10 % 704 2025-10-29
05 % 866 2025-10-31

Peakflow exceedence plot for ARAI1

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