Peakflow Forecasts Header

TIETON--RIMROCK LAKE NEAR RIMROCK
   State:  Washington    County:  YAKIMA
   Latitude:  46 39' 0" North    Longitude:  121 7' 59" West
   Elevation:  2926 feet
   Supporting WFO:  Pendleton    
   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.

TIETON--RIMROCK LAKE NEAR RIMROCK   (RILW1)
Forecasts for Water Year
2027
Ensemble Date: 2026-10-10
Forecast Period: October 10 to February 1
Exceedence
Probability
Inflow
CFS
Probable
Date of Peak
95 % 326 2026-10-25
90 % 493 2026-11-02
70 % 858 2026-11-24
50 % 1357 2026-12-09
30 % 2270 2027-01-08
10 % 3646 2027-01-30
05 % 5226 2027-01-31

Peakflow exceedence plot for RILW1

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