Peakflow Forecasts Header

ALSEA--NEAR TIDEWATER
   State:  Oregon    County:  LINCOLN
   Latitude:  44 23' 9" North    Longitude:  123 49' 50" West
   Elevation:  48 feet
   Supporting WFO:  Portland    
   Action Stage:  16'   Flood Stage:  18'   Moderate Flood Stage:  21'
   Major Flood Stage:  23'

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.

ALSEA--NEAR TIDEWATER   (TIDO3)
Forecasts for Water Year 2026
Ensemble Date: 2025-12-06
 Forecast Period: December 6 to April 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 9.24 6178 2025-12-11
90 % 9.68 6716 2025-12-18
70 % 11.62 9314 2025-12-31
50 % 13.87 12755 2026-01-15
30 % 15.48 15462 2026-01-31
10 % 20.42 25014 2026-02-22
05 % 22.90 30475 2026-03-03

Peakflow exceedence plot for TIDO3

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