Peakflow Forecasts Header

COWLITZ--NEAR KOSMOS
   State:  Washington    County:  LEWIS
   Latitude:  46 27' 58" North    Longitude:  122 7' 5" West
   Elevation:  780 feet
   Supporting WFO:  Seattle    

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--NEAR KOSMOS   (COKW1)
Forecasts for Water Year
2024
Ensemble Date: 2024-04-24
Forecast Period: April 24 to August 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 69.79 7467 2024-05-08
90 % 70.20 8119 2024-05-09
70 % 71.05 9568 2024-05-14
50 % 71.80 10976 2024-05-22
30 % 72.49 12389 2024-05-31
10 % 74.63 17365 2024-06-11
05 % 76.03 21191 2024-06-15

Peakflow exceedence plot for COKW1

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