Peakflow Forecasts Header

DESCHUTES--NEAR RAINIER
   State:  Washington    County:  THURSTON
   Latitude:  46 51' 8" North    Longitude:  122 40' 3" West
   Elevation:  349 feet
   Supporting WFO:  Seattle    
   Action Stage:  9'   Flood Stage:  11'   Moderate Flood Stage:  13.5'
   Major Flood Stage:  15'

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.

DESCHUTES--NEAR RAINIER   (DSRW1)
Forecasts for Water Year 2026
Ensemble Date: 2026-08-16
 Forecast Period: August 16 to December 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 4.16 247 2026-10-21
90 % 4.53 363 2026-10-29
70 % 5.59 808 2026-11-14
50 % 6.19 1128 2026-11-21
30 % 7.06 1675 2026-11-24
10 % 9.94 4116 2026-11-28
05 % 10.58 4765 2026-11-30

Peakflow exceedence plot for DSRW1

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