Peakflow Forecasts Header

NF SNOQUALMIE--NEAR SNOQUALMIE FALLS
   State:  Washington    County:  KING
   Latitude:  47 37' 0" North    Longitude:  121 43' 0" West
   Elevation:  1130 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.

NF SNOQUALMIE--NEAR SNOQUALMIE FALLS   (SNQW1)
Forecasts for Water Year
2025
Ensemble Date: 2025-05-14
Forecast Period: May 14 to September 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 3.63 567 2025-05-18
90 % 3.63 567 2025-05-18
70 % 4.58 1062 2025-06-02
50 % 5.26 1550 2025-06-11
30 % 5.75 1979 2025-06-21
10 % 6.74 3058 2025-08-10
05 % 7.31 3802 2025-08-19

Peakflow exceedence plot for SNQW1

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