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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: 2026-05-14
 Forecast Period: May 14 to September 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 11.67 1243 2026-05-17
90 % 11.67 1243 2026-05-17
70 % 11.74 1312 2026-06-01
50 % 12.30 1952 2026-06-07
30 % 12.88 2832 2026-06-12
10 % 14.07 4944 2026-06-22
05 % 14.80 6613 2026-06-25

Peakflow exceedence plot for ESTO3

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