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CLACKAMAS--AT ESTACADA
   State:  Oregon    County:  CLACKAMAS
   Latitude:  45 18' 0" North    Longitude:  122 21' 10" West
   Elevation:  297 feet
   Supporting WFO:  Portland    
   Action Stage:  18'   Flood Stage:  20'   Moderate Flood Stage:  23'
   Major Flood Stage:  25'

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.

CLACKAMAS--AT ESTACADA   (ESTO3)
Forecasts for Water Year 2026
Ensemble Date: 2026-09-08
 Forecast Period: September 8 to January 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 13.63 4351 2026-11-03
90 % 14.86 6897 2026-11-10
70 % 15.92 9818 2026-11-29
50 % 18.16 17149 2026-12-10
30 % 19.22 21380 2026-12-18
10 % 22.09 35203 2026-12-28
05 % 24.05 46591 2026-12-30

Peakflow exceedence plot for ESTO3

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