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 2025
Ensemble Date: 2025-07-16
 Forecast Period: July 16 to November 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 1.51 114 2025-09-12
90 % 1.75 161 2025-09-20
70 % 2.63 454 2025-10-15
50 % 3.37 812 2025-10-26
30 % 3.83 1074 2025-10-28
10 % 5.83 2576 2025-11-01
05 % 7.30 4007 2025-11-01

Peakflow exceedence plot for TIDO3

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