Peakflow Forecasts Header

KOOTENAI--LIBBY DAM
   State:  Montana    County:  LINCOLN
   Latitude:  48 28' 0" North    Longitude:  115 19' 0" West
   Elevation:  2459 feet
   Supporting WFO:  Missoula    
   Inflow Data  

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.

KOOTENAI--LIBBY DAM INFLOW   (LYDM8)
Forecasts for Water Year
2026
Ensemble Date: 2026-06-05
Forecast Period: June 5 to October 1
Exceedence
Probability
Inflow
CFS
Probable
Date of Peak
95 % 48626 2026-06-06
90 % 48626 2026-06-06
70 % 48626 2026-06-06
50 % 48626 2026-06-06
30 % 48626 2026-06-06
10 % 55631 2026-06-21
05 % 56396 2026-06-27

Peakflow exceedence plot for LYDM8

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