Peakflow Forecasts Header

WILLOW CREEK--RIRIE DAM
   State:  Idaho    County:  JEFFERSON
   Latitude:  43 34' 48" North    Longitude:  111 44' 33" West
   Elevation:  5119 feet
   Supporting WFO:  Pocatello    
   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.

WILLOW CREEK--RIRIE DAM   (RIDI1)
Forecasts for Water Year
2026
Ensemble Date: 2025-11-16
Forecast Period: November 16 to March 1
Exceedence
Probability
Inflow
CFS
Probable
Date of Peak
95 % 64 2025-11-17
90 % 64 2025-11-17
70 % 64 2025-11-17
50 % 64 2025-11-17
30 % 66 2025-12-06
10 % 108 2026-03-01
05 % 168 2026-03-01

Peakflow exceedence plot for RIDI1

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