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YAKIMA--AT KIONA
   State:  Washington    County:  YAKIMA
   Latitude:  46 15' 11" North    Longitude:  119 28' 37" West
   Elevation:  454 feet
   Supporting WFO:  Pendleton    
   Action Stage:  11'   Flood Stage:  13'   Moderate Flood Stage:  14.5'
   Major Flood Stage:  16'

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.

YAKIMA--AT KIONA   (KIOW1)
Forecasts for Water Year 2025
Ensemble Date: 2025-07-11
 Forecast Period: July 11 to November 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 3.66 1484 2025-08-01
90 % 3.68 1507 2025-08-02
70 % 3.71 1544 2025-08-08
50 % 3.74 1582 2025-08-12
30 % 3.77 1614 2025-08-14
10 % 4.67 2696 2025-10-29
05 % 5.58 3927 2025-11-01

Peakflow exceedence plot for KIOW1

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