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TRASK--TILLAMOOK
   State:  Oregon    County:  TILLAMOOK
   Latitude:  45 26' 23" North    Longitude:  123 43' 5" West
   Elevation:  50 feet
   Supporting WFO:  Portland    
   Action Stage:  15'   Flood Stage:  16.5'   Moderate Flood Stage:  19'
   Major Flood Stage:  22'

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.

TRASK--TILLAMOOK   (TRAO3)
Forecasts for Water Year 2026
Ensemble Date: 2026-04-14
 Forecast Period: April 14 to August 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 8.11 1271 2026-04-15
90 % 8.11 1271 2026-04-15
70 % 8.11 1271 2026-04-15
50 % 8.11 1271 2026-04-15
30 % 8.63 1676 2026-05-05
10 % 9.51 2463 2026-06-02
05 % 9.92 2866 2026-06-08

Peakflow exceedence plot for TRAO3

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