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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 2027
Ensemble Date: 2026-10-13
 Forecast Period: October 13 to February 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 2.40 357 2026-11-04
90 % 2.45 377 2026-11-07
70 % 3.10 752 2026-11-18
50 % 3.64 1168 2026-11-24
30 % 4.08 1582 2026-12-18
10 % 7.38 6185 2027-01-18
05 % 8.41 8246 2027-01-26

Peakflow exceedence plot for NITW1

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