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CHEHALIS--NEAR DOTY
   State:  Washington    County:  LEWIS
   Latitude:  46 37' 1" North    Longitude:  123 16' 42" West
   Elevation:  302 feet
   Supporting WFO:  Seattle    
   Action Stage:  315.5'   Flood Stage:  318'   Moderate Flood Stage:  323.5'
   Major Flood Stage:  324.5'

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.

CHEHALIS--NEAR DOTY   (DOTW1)
Forecasts for Water Year 2026
Ensemble Date: 2026-06-14
 Forecast Period: June 14 to October 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 306.81 165 2026-06-14
90 % 306.81 165 2026-06-14
70 % 306.81 165 2026-06-14
50 % 306.81 165 2026-06-14
30 % 306.82 168 2026-07-10
10 % 307.17 266 2026-09-27
05 % 308.29 736 2026-09-30

Peakflow exceedence plot for DOTW1

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