Peakflow Forecasts Header

HANGMAN CREEK--AT SPOKANE
   State:  Washington    County:  SPOKANE
   Latitude:  47 38' 57" North    Longitude:  117 27' 18" West
   Elevation:  1717 feet
   Supporting WFO:  Spokane    
   Action Stage:  10'   Flood Stage:  11'   Moderate Flood Stage:  13'
   Major Flood Stage:  15'

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.

HANGMAN CREEK--AT SPOKANE   (HAGW1)
Forecasts for Water Year 2026
Ensemble Date: 2026-08-16
 Forecast Period: August 16 to December 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 1.20 22 2026-11-13
90 % 1.20 22 2026-11-14
70 % 1.20 22 2026-11-14
50 % 1.24 25 2026-11-19
30 % 1.79 86 2026-11-27
10 % 3.15 454 2026-11-29
05 % 3.61 664 2026-11-30

Peakflow exceedence plot for HAGW1

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