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FLATHEAD--AT COLUMBIA FALLS
   State:  Montana    County:  FLATHEAD
   Latitude:  48 21' 42" North    Longitude:  114 11' 2" West
   Elevation:  2978 feet
   Supporting WFO:  Missoula    
   Action Stage:  12.5'   Flood Stage:  13'   Moderate Flood Stage:  18'
   Major Flood Stage:  22'

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.

FLATHEAD--AT COLUMBIA FALLS   (CFMM8)
Forecasts for Water Year 2025
Ensemble Date: 2025-05-15
 Forecast Period: May 15 to September 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 9.89 24399 2025-05-16
90 % 9.89 24399 2025-05-16
70 % 10.07 25259 2025-05-27
50 % 10.41 26988 2025-05-30
30 % 10.89 29504 2025-06-02
10 % 12.55 38870 2025-06-22
05 % 13.78 46376 2025-06-26

Peakflow exceedence plot for CFMM8

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