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
2025
Ensemble Date: 2025-06-30
Forecast Period: June 30 to October 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 690.71 466 2025-07-02
90 % 690.71 466 2025-07-02
70 % 690.76 492 2025-07-13
50 % 690.90 574 2025-08-21
30 % 691.12 713 2025-09-18
10 % 692.42 1899 2025-09-30
05 % 693.18 3064 2025-10-01

Peakflow exceedence plot for SRMO3

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