Peakflow Forecasts Header

TOUTLE--AT TOWER ROAD NEAR SILVER LAKE
   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 ROAD NEAR SILVER LAKE   (TOTW1)
Forecasts for Water Year
2024
Ensemble Date: 2024-04-19
Forecast Period: April 19 to August 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 122.02 1976 2024-05-01
90 % 122.05 2007 2024-05-04
70 % 122.62 2842 2024-05-13
50 % 123.07 3602 2024-05-20
30 % 123.51 4448 2024-06-01
10 % 124.11 5740 2024-06-15
05 % 124.91 7713 2024-06-19

Peakflow exceedence plot for TOTW1

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