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: 2025-12-09
 Forecast Period: December 9 to April 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 37.64 18670 2025-12-09
90 % 37.64 18670 2025-12-09
70 % 37.64 18670 2025-12-09
50 % 37.64 18670 2025-12-09
30 % 37.64 18670 2025-12-09
10 % 37.64 18670 2025-12-09
05 % 37.91 19668 2025-12-22

Peakflow exceedence plot for HLKW1

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