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: 2026-05-07
 Forecast Period: May 7 to September 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 3.51 92 2026-05-07
90 % 3.51 92 2026-05-07
70 % 3.54 99 2026-05-20
50 % 3.67 124 2026-06-01
30 % 4.05 216 2026-06-09
10 % 4.49 350 2026-06-22
05 % 4.60 386 2026-07-07

Peakflow exceedence plot for DSRW1

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