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
2022
Ensemble Date: 2021-12-08
Forecast Period: December 8 to April 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 12.64 8818 2021-12-12
90 % 12.94 9761 2021-12-22
70 % 14.98 16710 2022-01-05
50 % 16.19 22091 2022-01-18
30 % 18.11 32536 2022-02-04
10 % 19.10 38972 2022-03-04
05 % 19.57 42212 2022-03-22

Peakflow exceedence plot for SNDO3

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