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: 2026-05-14
 Forecast Period: May 14 to September 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 4.93 152 2026-05-14
90 % 4.93 152 2026-05-14
70 % 4.93 152 2026-05-14
50 % 5.58 305 2026-06-01
30 % 6.39 591 2026-06-07
10 % 7.62 1214 2026-06-14
05 % 7.90 1386 2026-06-16

Peakflow exceedence plot for TRSO3

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