Peakflow Forecasts Header

BITTERROOT--NEAR DARBY
   State:  Montana    County:  RAVALLI
   Latitude:  45 58' 19" North    Longitude:  114 8' 26" West
   Elevation:  3942 feet
   Supporting WFO:  Missoula    
   Action Stage:  7'   Flood Stage:  7.5'

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.

BITTERROOT--NEAR DARBY   (DARM8)
Forecasts for Water Year
2027
Ensemble Date: 2026-10-09
Forecast Period: October 9 to February 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 1.76 246 2026-10-25
90 % 1.76 248 2026-10-26
70 % 1.80 263 2026-10-28
50 % 1.86 284 2026-11-01
30 % 1.98 330 2026-11-13
10 % 2.63 660 2027-01-28
05 % 3.29 1136 2027-01-31

Peakflow exceedence plot for DARM8

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