St. Mary River near Babb MT
USGS 05017500 · Montana · reports discharge (live), gauge height
Reading St. Mary River near Babb MT…
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USGS 05017500 · Montana · reports discharge (live), gauge height
What the agencies suggest
Stand back from the shoreline and be aware of surroundingsRhode Island Department of Environmental Management
General guidance from the readings and the published lines named above, not a fishing forecast. Local rules and closures come first.
Reading Nov 5, 8:15 PM MST · provisional USGS data
Below normal for Nov 5 Rising · 24 h
Discharge, last 7 days: 169 readings from Oct 29, 9:15 PM MDT to Nov 5, 8:15 PM MST; ranging 92 to 117 ft³/s; latest 117 ft³/s; shaded band: typical range (25th–75th percentile) for each date.
USGS provisional data may be revised. Source: USGS instantaneous values.
| Time | Discharge (ft³/s) | Gauge height (ft) | Normal, 25th–75th (ft³/s) |
|---|---|---|---|
| Nov 5, 8:15 PM MST | 117 | 2.04 | 124–326 |
| Nov 5, 7:15 PM MST | 97.2 | 1.97 | 124–326 |
| Nov 5, 6:15 PM MST | 103 | 1.99 | 124–326 |
| Nov 5, 5:15 PM MST | 105 | 2 | 124–326 |
| Nov 5, 4:15 PM MST | 103 | 1.99 | 124–326 |
| Nov 5, 3:15 PM MST | 108 | 2.01 | 124–326 |
| Nov 5, 2:15 PM MST | 114 | 2.03 | 124–326 |
| Nov 5, 1:15 PM MST | 108 | 2.01 | 124–326 |
| Nov 5, 12:15 PM MST | 97.2 | 1.97 | 124–326 |
| Nov 5, 11:15 AM MST | 103 | 1.99 | 124–326 |
| Nov 5, 10:15 AM MST | 99.9 | 1.98 | 124–326 |
| Nov 5, 9:15 AM MST | 103 | 1.99 | 124–326 |
| Nov 5, 8:15 AM MST | 97.2 | 1.97 | 124–326 |
| Nov 5, 7:15 AM MST | 94.6 | 1.96 | 124–326 |
| Nov 5, 6:15 AM MST | 97.2 | 1.97 | 124–326 |
| Nov 5, 5:15 AM MST | 97.2 | 1.97 | 124–326 |
| Nov 5, 4:15 AM MST | 99.9 | 1.98 | 124–326 |
| Nov 5, 3:15 AM MST | 103 | 1.99 | 124–326 |
| Nov 5, 2:15 AM MST | 99.9 | 1.98 | 124–326 |
| Nov 5, 1:15 AM MST | 99.9 | 1.98 | 124–326 |
| Nov 5, 12:15 AM MST | 103 | 1.99 | 124–326 |
| Nov 4, 11:15 PM MST | 99.9 | 1.98 | 115–302 |
| Nov 4, 10:15 PM MST | 99.9 | 1.98 | 115–302 |
| Nov 4, 9:15 PM MST | 99.9 | 1.98 | 115–302 |
| Nov 4, 8:15 PM MST | 99.9 | 1.98 | 115–302 |
| Nov 4, 7:15 PM MST | 97.2 | 1.97 | 115–302 |
| Nov 4, 6:15 PM MST | 99.9 | 1.98 | 115–302 |
| Nov 4, 5:15 PM MST | 99.9 | 1.98 | 115–302 |
| Nov 4, 4:15 PM MST | 99.9 | 1.98 | 115–302 |
| Nov 4, 3:15 PM MST | 99.9 | 1.98 | 115–302 |
| Nov 4, 2:15 PM MST | 97.2 | 1.97 | 115–302 |
| Nov 4, 1:15 PM MST | 97.2 | 1.97 | 115–302 |
| Nov 4, 12:15 PM MST | 97.2 | 1.97 | 115–302 |
| Nov 4, 11:15 AM MST | 99.9 | 1.98 | 115–302 |
| Nov 4, 10:15 AM MST | 99.9 | 1.98 | 115–302 |
| Nov 4, 9:15 AM MST | 99.9 | 1.98 | 115–302 |
| Nov 4, 8:15 AM MST | 99.9 | 1.98 | 115–302 |
| Nov 4, 7:15 AM MST | 99.9 | 1.98 | 115–302 |
| Nov 4, 6:15 AM MST | 99.9 | 1.98 | 115–302 |
| Nov 4, 5:15 AM MST | 103 | 1.99 | 115–302 |
| Nov 4, 4:15 AM MST | 99.9 | 1.98 | 115–302 |
| Nov 4, 3:15 AM MST | 103 | 1.99 | 115–302 |
| Nov 4, 2:15 AM MST | 99.9 | 1.98 | 115–302 |
| Nov 4, 1:15 AM MST | 99.9 | 1.98 | 115–302 |
| Nov 4, 12:15 AM MST | 99.9 | 1.98 | 115–302 |
| Nov 3, 11:15 PM MST | 99.9 | 1.98 | 117–308 |
| Nov 3, 10:15 PM MST | 99.9 | 1.98 | 117–308 |
| Nov 3, 9:15 PM MST | 99.9 | 1.98 | 117–308 |
| Nov 3, 8:15 PM MST | 99.9 | 1.98 | 117–308 |
| Nov 3, 7:15 PM MST | 99.9 | 1.98 | 117–308 |
| Nov 3, 6:15 PM MST | 99.9 | 1.98 | 117–308 |
| Nov 3, 5:15 PM MST | 103 | 1.99 | 117–308 |
| Nov 3, 4:15 PM MST | 103 | 1.99 | 117–308 |
| Nov 3, 3:15 PM MST | 103 | 1.99 | 117–308 |
| Nov 3, 2:15 PM MST | 103 | 1.99 | 117–308 |
| Nov 3, 1:15 PM MST | 103 | 1.99 | 117–308 |
| Nov 3, 12:15 PM MST | 103 | 1.99 | 117–308 |
| Nov 3, 11:15 AM MST | 99.9 | 1.98 | 117–308 |
| Nov 3, 10:15 AM MST | 99.9 | 1.98 | 117–308 |
| Nov 3, 9:15 AM MST | 103 | 1.99 | 117–308 |
| Nov 3, 8:15 AM MST | 99.9 | 1.98 | 117–308 |
| Nov 3, 7:15 AM MST | 99.9 | 1.98 | 117–308 |
| Nov 3, 6:15 AM MST | 99.9 | 1.98 | 117–308 |
| Nov 3, 5:15 AM MST | 99.9 | 1.98 | 117–308 |
| Nov 3, 4:15 AM MST | 97.2 | 1.97 | 117–308 |
| Nov 3, 3:15 AM MST | 99.9 | 1.98 | 117–308 |
| Nov 3, 2:15 AM MST | 103 | 1.99 | 117–308 |
| Nov 3, 1:15 AM MST | 99.9 | 1.98 | 117–308 |
| Nov 3, 12:15 AM MST | 99.9 | 1.98 | 117–308 |
| Nov 2, 11:15 PM MST | 99.9 | 1.98 | 117–321 |
| Nov 2, 10:15 PM MST | 99.9 | 1.98 | 117–321 |
| Nov 2, 9:15 PM MST | 99.9 | 1.98 | 117–321 |
| Nov 2, 8:15 PM MST | 99.9 | 1.98 | 117–321 |
| Nov 2, 7:15 PM MST | 99.9 | 1.98 | 117–321 |
| Nov 2, 6:15 PM MST | 103 | 1.99 | 117–321 |
| Nov 2, 5:15 PM MST | 103 | 1.99 | 117–321 |
| Nov 2, 4:15 PM MST | 108 | 2.01 | 117–321 |
| Nov 2, 3:15 PM MST | 108 | 2.01 | 117–321 |
| Nov 2, 2:15 PM MST | 108 | 2.01 | 117–321 |
| Nov 2, 1:15 PM MST | 114 | 2.03 | 117–321 |
| Nov 2, 12:15 PM MST | 111 | 2.02 | 117–321 |
| Nov 2, 11:15 AM MST | 103 | 1.99 | 117–321 |
| Nov 2, 10:15 AM MST | 103 | 1.99 | 117–321 |
| Nov 2, 9:15 AM MST | 99.9 | 1.98 | 117–321 |
| Nov 2, 8:15 AM MST | 99.9 | 1.98 | 117–321 |
| Nov 2, 7:15 AM MST | 103 | 1.99 | 117–321 |
| Nov 2, 6:15 AM MST | 99.9 | 1.98 | 117–321 |
| Nov 2, 5:15 AM MST | 99.9 | 1.98 | 117–321 |
| Nov 2, 4:15 AM MST | 99.9 | 1.98 | 117–321 |
| Nov 2, 3:15 AM MST | 99.9 | 1.98 | 117–321 |
| Nov 2, 2:15 AM MST | 99.9 | 1.98 | 117–321 |
| Nov 2, 1:15 AM MST | 99.9 | 1.98 | 117–321 |
| Nov 2, 12:15 AM MST | 99.9 | 1.98 | 117–321 |
| Nov 1, 11:15 PM MST | 99.9 | 1.98 | 116–340 |
| Nov 1, 10:15 PM MST | 99.9 | 1.98 | 116–340 |
| Nov 1, 9:15 PM MST | 99.9 | 1.98 | 116–340 |
| Nov 1, 8:15 PM MST | 99.9 | 1.98 | 116–340 |
| Nov 1, 7:15 PM MST | 99.9 | 1.98 | 116–340 |
| Nov 1, 6:15 PM MST | 97.2 | 1.97 | 116–340 |
| Nov 1, 5:15 PM MST | 97.2 | 1.97 | 116–340 |
| Nov 1, 4:15 PM MST | 99.9 | 1.98 | 116–340 |
| Nov 1, 3:15 PM MST | 99.9 | 1.98 | 116–340 |
| Nov 1, 2:15 PM MST | 97.2 | 1.97 | 116–340 |
| Nov 1, 1:15 PM MST | 97.2 | 1.97 | 116–340 |
| Nov 1, 12:15 PM MST | 97.2 | 1.97 | 116–340 |
| Nov 1, 11:15 AM MST | 97.2 | 1.97 | 116–340 |
| Nov 1, 10:15 AM MST | 97.2 | 1.97 | 116–340 |
| Nov 1, 9:15 AM MST | 97.2 | 1.97 | 116–340 |
| Nov 1, 8:15 AM MST | 97.2 | 1.97 | 116–340 |
| Nov 1, 7:15 AM MST | 97.2 | 1.97 | 116–340 |
| Nov 1, 6:15 AM MST | 97.2 | 1.97 | 116–340 |
| Nov 1, 5:15 AM MST | 94.6 | 1.96 | 116–340 |
| Nov 1, 4:15 AM MST | 97.2 | 1.97 | 116–340 |
| Nov 1, 3:15 AM MST | 97.2 | 1.97 | 116–340 |
| Nov 1, 2:15 AM MST | 97.2 | 1.97 | 116–340 |
| Nov 1, 1:15 AM MST | 97.2 | 1.97 | 116–340 |
| Nov 1, 1:15 AM MDT | 97.2 | 1.97 | 116–340 |
| Nov 1, 12:15 AM MDT | 97.2 | 1.97 | 116–340 |
| Oct 31, 11:15 PM MDT | 97.2 | 1.97 | 115–346 |
| Oct 31, 10:15 PM MDT | 97.2 | 1.97 | 115–346 |
| Oct 31, 9:15 PM MDT | 97.2 | 1.97 | 115–346 |
| Oct 31, 8:15 PM MDT | 97.2 | 1.97 | 115–346 |
| Oct 31, 7:15 PM MDT | 97.2 | 1.97 | 115–346 |
| Oct 31, 6:15 PM MDT | 97.2 | 1.97 | 115–346 |
| Oct 31, 5:15 PM MDT | 99.9 | 1.98 | 115–346 |
| Oct 31, 4:15 PM MDT | 97.2 | 1.97 | 115–346 |
| Oct 31, 3:15 PM MDT | 97.2 | 1.97 | 115–346 |
| Oct 31, 2:15 PM MDT | 97.2 | 1.97 | 115–346 |
| Oct 31, 1:15 PM MDT | 94.6 | 1.96 | 115–346 |
| Oct 31, 12:15 PM MDT | 94.6 | 1.96 | 115–346 |
| Oct 31, 11:15 AM MDT | 94.6 | 1.96 | 115–346 |
| Oct 31, 10:15 AM MDT | 94.6 | 1.96 | 115–346 |
| Oct 31, 9:15 AM MDT | 92 | 1.95 | 115–346 |
| Oct 31, 8:15 AM MDT | 92 | 1.95 | 115–346 |
| Oct 31, 7:15 AM MDT | 94.6 | 1.96 | 115–346 |
| Oct 31, 6:15 AM MDT | 94.6 | 1.96 | 115–346 |
| Oct 31, 5:15 AM MDT | 92 | 1.95 | 115–346 |
| Oct 31, 4:15 AM MDT | 94.6 | 1.96 | 115–346 |
| Oct 31, 3:15 AM MDT | 94.6 | 1.96 | 115–346 |
| Oct 31, 2:15 AM MDT | 94.6 | 1.96 | 115–346 |
| Oct 31, 1:15 AM MDT | 94.6 | 1.96 | 115–346 |
| Oct 31, 12:15 AM MDT | 97.2 | 1.97 | 115–346 |
| Oct 30, 11:15 PM MDT | 99.9 | 1.98 | 119–365 |
| Oct 30, 10:15 PM MDT | 99.9 | 1.98 | 119–365 |
| Oct 30, 9:15 PM MDT | 99.9 | 1.98 | 119–365 |
| Oct 30, 8:15 PM MDT | 103 | 1.99 | 119–365 |
| Oct 30, 7:15 PM MDT | 103 | 1.99 | 119–365 |
| Oct 30, 6:15 PM MDT | 99.9 | 1.98 | 119–365 |
| Oct 30, 5:15 PM MDT | 103 | 1.99 | 119–365 |
| Oct 30, 4:15 PM MDT | 103 | 1.99 | 119–365 |
| Oct 30, 3:15 PM MDT | 105 | 2 | 119–365 |
| Oct 30, 2:15 PM MDT | 103 | 1.99 | 119–365 |
| Oct 30, 1:15 PM MDT | 105 | 2 | 119–365 |
| Oct 30, 12:15 PM MDT | 103 | 1.99 | 119–365 |
| Oct 30, 11:15 AM MDT | 105 | 2 | 119–365 |
| Oct 30, 10:15 AM MDT | 103 | 1.99 | 119–365 |
| Oct 30, 9:15 AM MDT | 103 | 1.99 | 119–365 |
| Oct 30, 8:15 AM MDT | 103 | 1.99 | 119–365 |
| Oct 30, 7:15 AM MDT | 105 | 2 | 119–365 |
| Oct 30, 6:15 AM MDT | 103 | 1.99 | 119–365 |
| Oct 30, 5:15 AM MDT | 103 | 1.99 | 119–365 |
| Oct 30, 4:15 AM MDT | 99.9 | 1.98 | 119–365 |
| Oct 30, 3:15 AM MDT | 99.9 | 1.98 | 119–365 |
| Oct 30, 2:15 AM MDT | 99.9 | 1.98 | 119–365 |
| Oct 30, 1:15 AM MDT | 99.9 | 1.98 | 119–365 |
| Oct 30, 12:15 AM MDT | 99.9 | 1.98 | 119–365 |
| Oct 29, 11:15 PM MDT | 99.9 | 1.98 | 120–368 |
| Oct 29, 10:15 PM MDT | 99.9 | 1.98 | 120–368 |
| Oct 29, 9:15 PM MDT | 99.9 | 1.98 | 120–368 |
Map of USGS gauge 05017500 and the river around it
Where St. Mary River near Babb MT sits, with 1 other gauge on the same river.
No current water-temperature reading at this gauge, so no temperature guidance is given. Take a stream thermometer: the trout lines Montana FWP uses are 66°F, 68°F and 73°F.
Species list not on file for this gauge. Check the Montana Fish, Wildlife & Parks: Montana fish stocking data · Montana fishing regulations.
Normal for Nov 5: 124–326 ft³/s (middle half of 76 years of record). Now: 117 ft³/s, below normal.
Below normal for this date. 117 ft³/s is between the 10th and 25th percentiles of daily mean flow for Nov 5 at this gauge over 76 years of record (1951–2026): 10th 77, 25th 124, median 216, 75th 326, 90th 572 ft³/s.
Daily means on record for Nov 5: lowest 44 ft³/s, highest 1,040 ft³/s.
Classes as USGS labels them (hyswap: flow categories (WDFN_stats schema) (U.S. Geological Survey) ); percentiles from the USGS daily statistics (U.S. Geological Survey) (approved daily means; the reading is provisional and instantaneous).
Rising over 24 hours: discharge up 17.1%, from 99.9 to 117 ft³/s. Rising or falling means a change of more than 10% in discharge (or 0.2 ft of gauge height) over 24 hours; our rule of thumb, not a USGS class.
Rising water. Rising over the last 24 hours (discharge up 17.1%). Keep your way back to the bank in sight and watch the level while you fish. “Rising” is our rule of thumb: more than 10% in discharge or 0.2 ft of gauge height in 24 hours, not a USGS or NWS class.
Turn Around Don't Drown. “A mere 6 inches of fast-moving flood water can knock over an adult.” No flow number makes a crossing safe; if in doubt, stay out.
Turn Around Don't Drown (National Weather Service)Guidance from the readings above and the published thresholds named with each line; not a fishing forecast, a safety guarantee or a statement about access. Local rules and closures come first.
NWS observed 2.04 ft stage, 104 ft³/s at Nov 5, 8:15 PM MST (NWS gauge SMYM8; its stage datum can differ from the USGS gauge height).
NWS has not set flood categories for this gauge.
Forecasts are not available. Only observed stages are available for this point.
Open the NWS gauge page · What the categories mean (National Weather Service)
Checked Nov 5, 9:03 PM MST; readings refresh at most every 15 minutes and statistics daily. Provisional USGS data can be revised. Conditions change: re-check before you go. This is general guidance, not a fishing forecast, a safety guarantee or a statement about access.