Peakflow Forecasts Header

SF FLATHEAD--HUNGRY HORSE DAM
   State:  Montana    County:  FLATHEAD
   Latitude:  48 20' 28" North    Longitude:  114 0' 47" West
   Elevation:  3560 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.

SF FLATHEAD--HUNGRY HORSE DAM   (HHWM8)
Forecasts for Water Year
2025
Ensemble Date: 2025-05-12
Forecast Period: May 12 to September 1
Exceedence
Probability
Inflow
CFS
Probable
Date of Peak
95 % 18260 2025-05-13
90 % 18260 2025-05-13
70 % 18260 2025-05-13
50 % 19410 2025-05-27
30 % 21050 2025-06-04
10 % 24771 2025-06-19
05 % 25781 2025-06-22

Peakflow exceedence plot for HHWM8

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