CLARK FORK − AT ST REGIS (SRGM8)
   State:  Montana
   County:  Mineral
   Latitude:  47 18' 6" North
   Longitude:  115 5' 11" West
   Elevation:  2600 ft

   Supporting NWS Forecast Office: WFO Missoula

   
Click for NWS Official River Forecasts for SRGM8
   


   Action Stage:  
18 ft
   Flood Stage:  
19 ft
   Moderate Flood Stage:  
21 ft
   Major Flood Stage:  
22 ft
Daily Historical Statistics for March 19, 2026
Mean Stage: 6.43 ft  Mean Flow: 4660 cfs
Max Stage: 12.74 ft  Max Flow: 25000 cfs (2017)
Min Stage:  4.86 ft   Min Flow: 2120 cfs (1988)

Statistics based on water years: 1930-2025
* statistics estimated based on current rating

Record Stage: 
20.27 ft
Record Flow: 
68900 cfs
Date of Record: 
May 18, 1997

The 4-10 Day Trend Forecast is based on model guidance and uncertainty during this period is greater.

Hydrograph plot for SRGM8

Data Used In Plot   "label   USGS Observations