Peakflow Forecasts Header

METHOW--AT WINTHROP
   State:  Washington    County:  OKANOGAN
   Latitude:  48 28' 0" North    Longitude:  120 10' 0" West
   Elevation:  1718 feet
   Supporting WFO:  Spokane    

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.

METHOW--AT WINTHROP   (WTHW1)
Forecasts for Water Year
2025
Ensemble Date: 2025-05-12
Forecast Period: May 12 to September 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 13.69 3870 2025-05-15
90 % 13.69 3870 2025-05-15
70 % 13.69 3870 2025-05-15
50 % 13.69 3870 2025-05-15
30 % 13.80 4036 2025-05-26
10 % 14.10 4524 2025-06-01
05 % 14.23 4721 2025-06-03

Peakflow exceedence plot for WTHW1

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