Peakflow Forecasts Header

SANDY--NEAR MARMOT
   State:  Oregon    County:  CLACKAMAS
   Latitude:  45 23' 30" North    Longitude:  122 7' 40" West
   Elevation:  730 feet
   Supporting WFO:  Portland    

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.

SANDY--NEAR MARMOT   (SRMO3)
Forecasts for Water Year
2026
Ensemble Date: 2026-06-10
Forecast Period: June 10 to October 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 690.40 1057 2026-06-10
90 % 690.40 1057 2026-06-10
70 % 690.40 1057 2026-06-10
50 % 690.40 1057 2026-06-10
30 % 690.52 1159 2026-06-26
10 % 691.60 2376 2026-09-22
05 % 692.26 3502 2026-10-01

Peakflow exceedence plot for SRMO3

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