Peakflow Forecasts Header

THOMAS CREEK--NEAR SCIO
   State:  Oregon    County:  LINN
   Latitude:  44 42' 43" North    Longitude:  122 46' 5" West
   Elevation:  380 feet    Gage Datum:  
   Supporting WFO:  Portland    
   Action Stage:  15.5'   Flood Stage:  18'   Moderate Flood Stage:  19'
   Major Flood Stage:  20'

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.

THOMAS CREEK--NEAR SCIO   (TRSO3)
Forecasts for Water Year 2026
Ensemble Date: 2026-08-16
 Forecast Period: August 16 to December 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 5.87 320 2026-10-19
90 % 6.73 635 2026-10-28
70 % 8.57 1807 2026-11-11
50 % 9.77 2551 2026-11-19
30 % 12.89 5698 2026-11-24
10 % 15.51 9610 2026-11-29
05 % 16.92 12144 2026-11-30

Peakflow exceedence plot for TRSO3

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