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 2025
Ensemble Date: 2025-07-11
 Forecast Period: July 11 to November 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 2.81 448 2025-09-01
90 % 2.82 450 2025-09-17
70 % 2.88 475 2025-10-16
50 % 2.95 507 2025-10-18
30 % 3.01 533 2025-10-21
10 % 3.11 586 2025-10-27
05 % 3.32 698 2025-10-30

Peakflow exceedence plot for DRMM8

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