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 2025
Ensemble Date: 2025-05-12
 Forecast Period: May 12 to September 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 15.28 3273 2025-05-14
90 % 15.28 3273 2025-05-14
70 % 15.28 3273 2025-05-14
50 % 15.28 3273 2025-05-14
30 % 15.28 3273 2025-05-14
10 % 15.57 3766 2025-06-07
05 % 15.84 4259 2025-06-11

Peakflow exceedence plot for NACW1

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