Peakflow Forecasts Header

LONG TOM--FERN RIDGE DAM
   State:  Oregon    County:  LANE
   Latitude:  44 7' 24" North    Longitude:  123 17' 54" West
   Elevation:  374 feet
   Supporting WFO:  Portland    
   Inflow Data  

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.

LONG TOM--FERN RIDGE DAM   (FRNO3)
Forecasts for Water Year
2022
Ensemble Date: 2021-12-08
Forecast Period: December 8 to April 1
Exceedence
Probability
Inflow
CFS
Probable
Date of Peak
95 % 2159 2021-12-23
90 % 2514 2021-12-29
70 % 3679 2022-01-13
50 % 4123 2022-01-24
30 % 8771 2022-02-12
10 % 16864 2022-03-04
05 % 20990 2022-03-29

Peakflow exceedence plot for FRNO3

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