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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 2026
Ensemble Date: 2026-04-14
 Forecast Period: April 14 to August 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 5.52 4071 2026-04-14
90 % 5.52 4071 2026-04-14
70 % 5.52 4071 2026-04-14
50 % 6.00 4776 2026-05-03
30 % 6.72 5874 2026-05-13
10 % 7.60 7293 2026-05-26
05 % 8.55 8904 2026-06-12

Peakflow exceedence plot for KIOW1

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