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SIMILKAMEEN--NEAR NIGHTHAWK
   State:  Washington    County:  OKANOGAN
   Latitude:  48 59' 4" North    Longitude:  119 37' 9" West
   Elevation:  1138 feet
   Supporting WFO:  Spokane    
   Action Stage:  13'   Flood Stage:  14'   Moderate Flood Stage:  15'
   Major Flood Stage:  16'

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.

SIMILKAMEEN--NEAR NIGHTHAWK   (NITW1)
Forecasts for Water Year 2026
Ensemble Date: 2026-06-14
 Forecast Period: June 14 to October 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 6.17 4150 2026-06-18
90 % 6.17 4150 2026-06-18
70 % 6.17 4150 2026-06-18
50 % 6.17 4150 2026-06-18
30 % 6.17 4150 2026-06-18
10 % 6.19 4179 2026-06-22
05 % 6.59 4815 2026-07-01

Peakflow exceedence plot for NITW1

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