Peakflow Forecasts Header

CLARK FORK--NR DRUMMOND
   State:  Montana    County:  GRANITE
   Latitude:  46 42' 44" North    Longitude:  113 19' 48" West
   Elevation:  3379 feet
   Supporting WFO:  Missoula    
   Action Stage:  7'   Flood Stage:  8'   Moderate Flood Stage:  10'
   Major Flood Stage:  11.5'

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--NR DRUMMOND   (DRMM8)
Forecasts for Water Year 2027
Ensemble Date: 2026-10-10
 Forecast Period: October 10 to February 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 3.18 569 2026-10-27
90 % 3.18 571 2026-10-27
70 % 3.19 576 2026-10-27
50 % 3.22 587 2026-10-28
30 % 3.24 598 2026-10-30
10 % 3.27 616 2026-11-05
05 % 3.42 698 2026-11-13

Peakflow exceedence plot for DRMM8

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