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CLARK FORK--BELOW MISSOULA
   State:  Montana    County:  MISSOULA
   Latitude:  46 52' 9" North    Longitude:  114 7' 32" West
   Elevation:  3084 feet
   Supporting WFO:  Missoula    
   Action Stage:  10.5'   Flood Stage:  11'   Moderate Flood Stage:  12'
   Major Flood Stage:  13'

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.

CLARK FORK--BELOW MISSOULA   (BELM8)
Forecasts for Water Year 2026
Ensemble Date: 2026-09-15
 Forecast Period: September 15 to January 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 1.35 2520 2026-09-19
90 % 1.35 2520 2026-09-19
70 % 1.37 2570 2026-09-29
50 % 1.52 2870 2026-10-28
30 % 1.99 3896 2026-11-05
10 % 2.85 6165 2026-12-05
05 % 3.58 8502 2026-12-26

Peakflow exceedence plot for BELM8

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