Peakflow Forecasts Header

COWLITZ--AT RANDLE
   State:  Washington    County:  LEWIS
   Latitude:  46 31' 57" North    Longitude:  121 57' 20" West
   Elevation:  890 feet
   Supporting WFO:  Seattle    
   Action Stage:  13.2'   Flood Stage:  18'   Moderate Flood Stage:  20'
   Major Flood Stage:  22'

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.

COWLITZ--AT RANDLE   (RAWW1)
Forecasts for Water Year 2024
Ensemble Date: 2024-04-26
 Forecast Period: April 26 to August 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 8.60 5327 2024-05-10
90 % 8.84 5629 2024-05-13
70 % 9.26 6163 2024-05-17
50 % 9.73 6773 2024-05-27
30 % 11.06 8527 2024-06-01
10 % 13.56 11856 2024-06-12
05 % 15.96 14921 2024-06-20

Peakflow exceedence plot for RAWW1

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