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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: 2026-02-18
 Forecast Period: February 18 to June 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 309.96 1727 2026-02-28
90 % 310.11 1850 2026-03-01
70 % 310.74 2401 2026-03-08
50 % 311.25 2910 2026-03-16
30 % 312.64 4531 2026-03-28
10 % 315.50 8551 2026-04-11
05 % 316.95 10889 2026-04-17

Peakflow exceedence plot for DOTW1

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