Peakflow Forecasts Header

NASELLE--NEAR NASELLE
   State:  Washington    County:  PACIFIC
   Latitude:  46 22' 25" North    Longitude:  123 44' 36" West
   Elevation:  24 feet
   Supporting WFO:  Portland    
   Action Stage:  14'   Flood Stage:  15'   Moderate Flood Stage:  16'
   Major Flood Stage:  17'

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.

NASELLE--NEAR NASELLE   (NASW1)
Forecasts for Water Year 2026
Ensemble Date: 2026-06-06
 Forecast Period: June 6 to October 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 4.84 176 2026-06-09
90 % 4.84 176 2026-06-09
70 % 4.84 176 2026-06-09
50 % 4.84 176 2026-06-09
30 % 5.16 256 2026-09-05
10 % 6.01 564 2026-09-28
05 % 6.73 928 2026-09-30

Peakflow exceedence plot for NASW1

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