Peakflow Forecasts Header

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 2025
Ensemble Date: 2025-07-11
 Forecast Period: July 11 to November 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 6.17 156 2025-09-17
90 % 6.30 198 2025-10-02
70 % 6.96 454 2025-10-18
50 % 7.69 850 2025-10-26
30 % 8.73 1596 2025-10-31
10 % 10.89 3782 2025-11-01
05 % 11.59 4653 2025-11-01

Peakflow exceedence plot for TRAO3

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