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
2026
Ensemble Date: 2026-01-23
Forecast Period: January 23 to May 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 7.61 5372 2026-02-06
90 % 8.12 6257 2026-02-08
70 % 9.41 8826 2026-02-20
50 % 10.65 11677 2026-03-11
30 % 13.60 20230 2026-04-07
10 % 15.84 28788 2026-04-24
05 % 18.19 48661 2026-04-30

Peakflow exceedence plot for SQUW1

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