Peakflow Forecasts Header

SNOQUALMIE--NEAR SNOQUALMIE
   State:  Washington    County:  KING
   Latitude:  47 32' 43" North    Longitude:  121 50' 28" West
   Elevation:  120 feet
   Supporting WFO:  Seattle    

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.

SNOQUALMIE--NEAR SNOQUALMIE   (SQUW1)
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 % 7.01 4265 2025-05-18
90 % 7.01 4265 2025-05-18
70 % 7.33 4756 2025-05-29
50 % 8.49 6766 2025-06-03
30 % 9.35 8512 2025-06-13
10 % 11.72 14378 2025-06-27
05 % 13.37 19463 2025-08-06

Peakflow exceedence plot for SQUW1

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