Peakflow Forecasts Header

ST. REGIS--NEAR ST. REGIS
   State:  Montana    County:  MINERAL
   Latitude:  47 17' 48" North    Longitude:  115 7' 18" West
   Elevation:  2645 feet
   Supporting WFO:  Missoula    
   Action Stage:  7.5'   Flood Stage:  8'

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.

ST. REGIS--NEAR ST. REGIS   (STRM8)
Forecasts for Water Year
2026
Ensemble Date: 2026-04-15
Forecast Period: April 15 to August 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 4.77 1792 2026-04-23
90 % 4.77 1792 2026-04-23
70 % 4.83 1851 2026-04-27
50 % 4.96 1987 2026-05-02
30 % 5.22 2255 2026-05-16
10 % 5.54 2609 2026-05-25
05 % 5.69 2783 2026-05-31

Peakflow exceedence plot for STRM8

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