Peakflow Forecasts Header

SKOOKUMCHUCK--AT CENTRALIA
   State:  Washington    County:  LEWIS
   Latitude:  46 43' 49" North    Longitude:  122 57' 14" West
   Elevation:  100 feet
   Supporting WFO:  Seattle    
   Action Stage:  187'   Flood Stage:  189'   Moderate Flood Stage:  190'
   Major Flood Stage:  191'

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.

SKOOKUMCHUCK--AT CENTRALIA   (CTAW1)
Forecasts for Water Year 2025
Ensemble Date: 2025-07-14
 Forecast Period: July 14 to November 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 176.99 138 2025-07-22
90 % 177.02 144 2025-07-26
70 % 177.16 176 2025-08-23
50 % 177.50 264 2025-10-15
30 % 177.91 375 2025-10-26
10 % 179.19 766 2025-11-01
05 % 179.58 896 2025-11-01

Peakflow exceedence plot for CTAW1

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