Peakflow Forecasts Header

YAKIMA--NEAR HORLICK
   State:  Washington    County:  KITTITAS
   Latitude:  47 7' 27" North    Longitude:  120 44' 21" West
   Elevation:  1700 feet
   Supporting WFO:  Pendleton    
   Action Stage:  35.5'   Flood Stage:  36'   Moderate Flood Stage:  37'
   Major Flood Stage:  38.5'

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--NEAR HORLICK   (HLKW1)
Forecasts for Water Year 2026
Ensemble Date: 2026-06-14
 Forecast Period: June 14 to October 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 30.95 2860 2026-07-02
90 % 30.95 2860 2026-07-02
70 % 30.95 2861 2026-07-02
50 % 30.95 2864 2026-07-16
30 % 30.95 2866 2026-08-05
10 % 30.96 2872 2026-08-05
05 % 30.96 2882 2026-08-06

Peakflow exceedence plot for HLKW1

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