Peakflow Forecasts Header

MARYS--NEAR PHILOMATH
   State:  Oregon    County:  BENTON
   Latitude:  44 31' 35" North    Longitude:  123 19' 59" West
   Elevation:  224 feet
   Supporting WFO:  Portland    
   Action Stage:  16'   Flood Stage:  20'   Moderate Flood Stage:  21'
   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.

MARYS--NEAR PHILOMATH   (PHIO3)
Forecasts for Water Year 2026
Ensemble Date: 2026-05-12
 Forecast Period: May 12 to September 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 3.49 112 2026-05-14
90 % 3.49 112 2026-05-14
70 % 3.49 112 2026-05-14
50 % 3.49 112 2026-05-14
30 % 3.49 112 2026-05-14
10 % 4.95 219 2026-06-06
05 % 7.25 508 2026-06-12

Peakflow exceedence plot for PHIO3

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