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
2022
Ensemble Date: 2021-12-08
Forecast Period: December 8 to April 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 7.19 1638 2021-12-30
90 % 7.52 1825 2022-01-07
70 % 8.59 2515 2022-01-31
50 % 9.93 3562 2022-02-17
30 % 10.78 4381 2022-03-04
10 % 12.73 6652 2022-03-26
05 % 13.78 7939 2022-03-29

Peakflow exceedence plot for TCHW1

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