Peakflow Forecasts Header

WALLA WALLA--NEAR TOUCHET
   State:  Washington    County:  WALLA WALLA
   Latitude:  46 2' 0" North    Longitude:  118 44' 0" West
   Elevation:  405 feet
   Supporting WFO:  Pendleton    
   Action Stage:  10'   Flood Stage:  13'   Moderate Flood Stage:  15'
   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.

WALLA WALLA--NEAR TOUCHET   (TCHW1)
Forecasts for Water Year
2024
Ensemble Date: 2024-04-22
Forecast Period: April 22 to August 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 4.86 576 2024-04-29
90 % 5.08 676 2024-05-05
70 % 5.46 863 2024-05-10
50 % 5.80 1065 2024-05-17
30 % 6.27 1381 2024-05-21
10 % 7.40 2302 2024-05-31
05 % 10.54 4918 2024-06-09

Peakflow exceedence plot for TCHW1

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