Peakflow Forecasts Header

ISSAQUAH CREEK--NEAR MOUTH
   State:  Washington    County:  KING
   Latitude:  47 33' 0" North    Longitude:  122 3' 0" West
   Elevation:  36 feet
   Supporting WFO:  Seattle    
   Action Stage:  9.04'   Flood Stage:  10.82'   Moderate Flood Stage:  11.57'
   Major Flood Stage:  
12.76'

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.

ISSAQUAH CREEK--NEAR MOUTH   (ISSW1)
Forecasts for Water Year
2022
Ensemble Date: 2021-12-08
Forecast Period: December 8 to April 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 5.96 414 2021-12-13
90 % 6.07 442 2021-12-22
70 % 7.09 718 2022-01-08
50 % 8.70 1224 2022-01-18
30 % 10.35 1818 2022-02-01
10 % 13.95 3332 2022-03-12
05 % 14.53 3680 2022-03-27

Peakflow exceedence plot for ISSW1

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