Peakflow Forecasts Header

NISQUALLY--NEAR NATIONAL
   State:  Washington    County:  PIERCE
   Latitude:  46 45' 10" North    Longitude:  122 4' 57" West
   Elevation:  1450 feet
   Supporting WFO:  Seattle    
   Action Stage:  7.96'   Flood Stage:  9.21'   Moderate Flood Stage:  10.01'
   Major Flood Stage:  
11.67'

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.

NISQUALLY--NEAR NATIONAL   (NISW1)
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 % 6.81 2582 2021-12-12
90 % 6.81 2582 2021-12-12
70 % 7.20 3219 2021-12-27
50 % 8.45 5758 2022-01-10
30 % 9.26 7818 2022-02-03
10 % 10.85 12397 2022-03-06
05 % 11.19 13440 2022-03-20

Peakflow exceedence plot for NISW1

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