Peakflow Forecasts Header

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 2027
Ensemble Date: 2026-10-13
 Forecast Period: October 13 to February 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 2.77 71 2026-10-13
90 % 2.77 71 2026-10-13
70 % 2.77 71 2026-10-13
50 % 3.54 258 2026-11-29
30 % 4.30 627 2027-01-08
10 % 5.17 1263 2027-01-29
05 % 5.58 1658 2027-01-31

Peakflow exceedence plot for FISM8

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