Peakflow Forecasts Header

CARBON--NEAR FAIRFAX
   State:  Washington    County:  PIERCE
   Latitude:  47 2' 0" North    Longitude:  122 1' 59" West
   Elevation:  1213 feet
   Supporting WFO:  Seattle    
   Action Stage:  11.6'   Flood Stage:  13.5'   Moderate Flood Stage:  14.5'
   Major Flood Stage:  15'

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.

CARBON--NEAR FAIRFAX   (FFXW1)
Forecasts for Water Year 2026
Ensemble Date: 2026-04-14
 Forecast Period: April 14 to August 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 7.40 649 2026-04-22
90 % 7.40 649 2026-04-22
70 % 7.97 902 2026-05-14
50 % 8.59 1216 2026-05-22
30 % 9.15 1581 2026-06-04
10 % 10.12 2501 2026-06-20
05 % 11.11 3709 2026-06-27

Peakflow exceedence plot for FFXW1

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