Peakflow Forecasts Header

SANDY--SANDY
   State:  Oregon    County:  CLACKAMAS
   Latitude:  45 26' 57" North    Longitude:  122 14' 37" West
   Elevation:  240 feet
   Supporting WFO:  Portland    
   Action Stage:  18'   Flood Stage:  19.3'
   Major Flood Stage:  
21.5'

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--SANDY   (SNDO3)
Forecasts for Water Year
2024
Ensemble Date: 2024-05-03
Forecast Period: May 3 to September 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 12.01 6881 2024-05-06
90 % 12.01 6881 2024-05-06
70 % 12.01 6881 2024-05-06
50 % 12.01 6881 2024-05-06
30 % 12.01 6881 2024-05-06
10 % 13.23 10586 2024-05-29
05 % 13.90 12648 2024-06-08

Peakflow exceedence plot for SNDO3

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