Peakflow Forecasts Header

OKANOGAN--NEAR TONASKET
   State:  Washington    County:  OKANOGAN
   Latitude:  48 37' 57" North    Longitude:  119 27' 28" West
   Elevation:  861 feet
   Supporting WFO:  Spokane    
   Action Stage:  14'   Flood Stage:  15'   Moderate Flood Stage:  17'
   Major Flood Stage:  18'

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.

OKANOGAN--NEAR TONASKET   (TONW1)
Forecasts for Water Year 2024
Ensemble Date: 2024-04-25
 Forecast Period: April 25 to August 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 9.85 7449 2024-05-10
90 % 10.21 8128 2024-05-12
70 % 11.07 9725 2024-05-18
50 % 11.51 10579 2024-05-22
30 % 12.03 11615 2024-05-27
10 % 13.27 14234 2024-06-04
05 % 13.52 14781 2024-06-12

Peakflow exceedence plot for TONW1

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