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FISHER--NEAR LIBBY
   State:  Montana    County:  FLATHEAD
   Latitude:  48 21' 20" North    Longitude:  115 18' 50" West
   Elevation:  2134 feet
   Supporting WFO:  Missoula    
   Action Stage:  7'   Flood Stage:  7.5'   Moderate Flood Stage:  8.5'
   Major Flood Stage:  10'

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.

FISHER--NEAR LIBBY   (FISM8)
Forecasts for Water Year 2026
Ensemble Date: 2025-12-06
 Forecast Period: December 6 to April 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 5.08 1190 2025-12-10
90 % 5.08 1190 2025-12-10
70 % 5.08 1190 2025-12-10
50 % 5.08 1190 2025-12-10
30 % 5.13 1233 2026-01-25
10 % 5.77 1869 2026-03-25
05 % 6.68 3036 2026-03-31

Peakflow exceedence plot for FISM8

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