Peakflow Forecasts Header

NF FLATHEAD--NEAR COLUMBIA FALLS
   State:  Montana    County:  FLATHEAD
   Latitude:  48 29' 44" North    Longitude:  114 7' 36" West
   Elevation:  3145 feet
   Supporting WFO:  Missoula    
   Action Stage:  12.5'   Flood Stage:  13'   Moderate Flood Stage:  17'
   Major Flood Stage:  
19'

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.

NF FLATHEAD--NEAR COLUMBIA FALLS   (FCFM8)
Forecasts for Water Year
2026
Ensemble Date: 2026-06-06
Forecast Period: June 6 to October 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 6.88 10894 2026-06-06
90 % 6.88 10894 2026-06-06
70 % 6.88 10894 2026-06-06
50 % 6.88 10894 2026-06-06
30 % 6.88 10894 2026-06-06
10 % 7.12 11623 2026-06-21
05 % 7.63 13263 2026-06-22

Peakflow exceedence plot for FCFM8

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