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: 2025-05-14
 Forecast Period: May 14 to September 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 177.61 293 2025-06-03
90 % 177.64 300 2025-06-05
70 % 177.69 314 2025-06-29
50 % 177.75 329 2025-08-02
30 % 177.79 342 2025-08-13
10 % 178.26 476 2025-08-16
05 % 178.48 544 2025-08-22

Peakflow exceedence plot for CTAW1

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