Peakflow Forecasts Header

TOUTLE--AT TOWER BRIDGE
   State:  Washington    County:  COWLITZ
   Latitude:  46 20' 2" North    Longitude:  122 50' 20" West
   Elevation:  170 feet
   Supporting WFO:  Portland    
   Action Stage:  135'   Flood Stage:  137'
   Major Flood Stage:  
140'

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.

TOUTLE--AT TOWER BRIDGE   (TOTW1)
Forecasts for Water Year
2022
Ensemble Date: 2021-12-08
Forecast Period: December 8 to April 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 124.26 5809 2021-12-12
90 % 124.28 5864 2021-12-15
70 % 124.92 7347 2022-01-08
50 % 126.19 10825 2022-01-29
30 % 127.26 14285 2022-02-09
10 % 130.08 23852 2022-03-15
05 % 134.77 41655 2022-03-22

Peakflow exceedence plot for TOTW1

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