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NEWAUKUM--NEAR CHEHALIS
   State:  Washington    County:  LEWIS
   Latitude:  46 37' 13" North    Longitude:  122 56' 38" West
   Elevation:  190 feet
   Supporting WFO:  Seattle    
   Action Stage:  200.5'   Flood Stage:  202.5'   Moderate Flood Stage:  204.5'
   Major Flood Stage:  205.5'

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.

NEWAUKUM--NEAR CHEHALIS   (NEWW1)
Forecasts for Water Year 2022
Ensemble Date: 2021-12-08
 Forecast Period: December 8 to April 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 199.61 2573 2021-12-12
90 % 199.61 2573 2021-12-12
70 % 201.72 4002 2021-12-29
50 % 203.94 6145 2022-01-15
30 % 205.65 9387 2022-01-30
10 % 206.82 15994 2022-02-20
05 % 206.88 20757 2022-02-23

Peakflow exceedence plot for NEWW1

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