MEDIAN FLOW RATE · 1 YEAR
1,653cfs 49.2% vs avg
Optimal band: 422–570 cfs
PERIOD HIGH
4,879cfs
PERIOD LOW
94cfs
RUNNABLE
11%
last 1 year in band
Precipitation History
Your History · St. Mary R nr Int'l Boundary, MT
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Station Location
49.0119, -113.2992Loading map…
DATA · USGS · NOAA · NWSUPDATED 2026-07-07 00:00 UTC
Site #05020500·USGS
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