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: 2025-07-05
Forecast Period: July 5 to November 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 4.24 1152 2025-08-26
90 % 5.92 2806 2025-09-05
70 % 8.52 6828 2025-10-09
50 % 10.08 10141 2025-10-21
30 % 13.05 18402 2025-10-27
10 % 16.71 34734 2025-10-29
05 % 17.66 43215 2025-10-31

Peakflow exceedence plot for SQUW1

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