Peakflow Forecasts Header

NACHES--NEAR NACHES
   State:  Washington    County:  YAKIMA
   Latitude:  46 44' 48" North    Longitude:  120 46' 5" West
   Elevation:  1550 feet
   Supporting WFO:  Pendleton    
   Action Stage:  16'   Flood Stage:  17.8'   Moderate Flood Stage:  19'
   Major Flood Stage:  
21'

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.

NACHES--NEAR NACHES   (NACW1)
Forecasts for Water Year
2022
Ensemble Date: 2021-12-07
Forecast Period: December 7 to April 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 13.95 913 2021-12-18
90 % 14.05 1095 2021-12-28
70 % 14.66 2104 2022-01-26
50 % 15.26 3102 2022-02-23
30 % 15.71 3891 2022-03-15
10 % 18.38 9169 2022-03-29
05 % 18.58 9605 2022-04-01

Peakflow exceedence plot for NACW1

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