Peakflow Forecasts Header

CLARK FORK--AT ST REGIS
   State:  Montana    County:  MINERAL
   Latitude:  47 18' 6" North    Longitude:  115 5' 11" West
   Elevation:  2600 feet
   Supporting WFO:  Missoula    
   Action Stage:  18'   Flood Stage:  19'   Moderate Flood Stage:  21'
   Major Flood Stage:  
22'

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--AT ST REGIS   (SRGM8)
Forecasts for Water Year
2025
Ensemble Date: 2025-07-14
Forecast Period: July 14 to November 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 5.25 2700 2025-07-18
90 % 5.25 2700 2025-07-18
70 % 5.27 2734 2025-08-01
50 % 5.35 2840 2025-09-16
30 % 5.48 3039 2025-10-16
10 % 6.05 3986 2025-10-30
05 % 6.49 4813 2025-11-01

Peakflow exceedence plot for SRGM8

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