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: 2026-08-16
Forecast Period: August 16 to December 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 1.97 143 2026-08-29
90 % 2.04 164 2026-09-01
70 % 2.20 212 2026-09-29
50 % 2.31 253 2026-10-27
30 % 2.49 323 2026-11-04
10 % 2.97 536 2026-11-16
05 % 3.38 766 2026-11-26

Peakflow exceedence plot for STRM8

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