Blanco Rv at San Marcos, TX
USGS 08171350 · Texas · reports discharge (live), gauge height
Reading Blanco Rv at San Marcos, TX…
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USGS 08171350 · Texas · reports discharge (live), gauge height
What the agencies suggest
Carry a pocket thermometer to monitor water temperatureNational Park Service
General guidance from the readings and the published lines named above, not a fishing forecast. Local rules and closures come first.
Reading Nov 5, 7:45 PM CST · provisional USGS data
Normal for Nov 5 Steady · 24 h Below NWS action stage
Discharge, last 7 days: 185 readings from Oct 29, 8:45 PM CDT to Nov 5, 7:45 PM CST; ranging 0 to 0 ft³/s; latest 0 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, 7:45 PM CST | 0 | 7.11 | 0–158 |
| Nov 5, 6:50 PM CST | 0 | 7.11 | 0–158 |
| Nov 5, 5:55 PM CST | 0 | 7.1 | 0–158 |
| Nov 5, 5:00 PM CST | 0 | 7.1 | 0–158 |
| Nov 5, 4:05 PM CST | 0 | 7.03 | 0–158 |
| Nov 5, 3:10 PM CST | 0 | 7.1 | 0–158 |
| Nov 5, 2:15 PM CST | 0 | 7.04 | 0–158 |
| Nov 5, 1:20 PM CST | 0 | 7.1 | 0–158 |
| Nov 5, 12:25 PM CST | 0 | 7.05 | 0–158 |
| Nov 5, 11:30 AM CST | 0 | 7.06 | 0–158 |
| Nov 5, 10:35 AM CST | 0 | 7.07 | 0–158 |
| Nov 5, 9:40 AM CST | 0 | 7.11 | 0–158 |
| Nov 5, 8:45 AM CST | 0 | 7.11 | 0–158 |
| Nov 5, 7:50 AM CST | 0 | 7.11 | 0–158 |
| Nov 5, 6:55 AM CST | 0 | 7.12 | 0–158 |
| Nov 5, 6:00 AM CST | 0 | 7.11 | 0–158 |
| Nov 5, 5:05 AM CST | 0 | 7.11 | 0–158 |
| Nov 5, 4:10 AM CST | 0 | 7.12 | 0–158 |
| Nov 5, 3:15 AM CST | 0 | 7.12 | 0–158 |
| Nov 5, 2:20 AM CST | 0 | 7.11 | 0–158 |
| Nov 5, 1:25 AM CST | 0 | 7.11 | 0–158 |
| Nov 5, 12:30 AM CST | 0 | 7.12 | 0–158 |
| Nov 4, 11:35 PM CST | 0 | 7.12 | 0–169 |
| Nov 4, 10:40 PM CST | 0 | 7.12 | 0–169 |
| Nov 4, 9:45 PM CST | 0 | 7.12 | 0–169 |
| Nov 4, 8:50 PM CST | 0 | 7.12 | 0–169 |
| Nov 4, 7:55 PM CST | 0 | 7.12 | 0–169 |
| Nov 4, 7:00 PM CST | 0 | 7.12 | 0–169 |
| Nov 4, 6:05 PM CST | 0 | 7.12 | 0–169 |
| Nov 4, 5:10 PM CST | 0 | 7.12 | 0–169 |
| Nov 4, 4:15 PM CST | 0 | 7.12 | 0–169 |
| Nov 4, 3:20 PM CST | 0 | 7.12 | 0–169 |
| Nov 4, 2:25 PM CST | 0 | 7.13 | 0–169 |
| Nov 4, 1:30 PM CST | 0 | 7.13 | 0–169 |
| Nov 4, 12:35 PM CST | 0 | 7.13 | 0–169 |
| Nov 4, 11:40 AM CST | 0 | 7.14 | 0–169 |
| Nov 4, 10:45 AM CST | 0 | 7.15 | 0–169 |
| Nov 4, 9:50 AM CST | 0 | 7.15 | 0–169 |
| Nov 4, 8:55 AM CST | 0 | 7.16 | 0–169 |
| Nov 4, 8:00 AM CST | 0 | 7.16 | 0–169 |
| Nov 4, 7:05 AM CST | 0 | 7.16 | 0–169 |
| Nov 4, 6:10 AM CST | 0 | 7.17 | 0–169 |
| Nov 4, 5:15 AM CST | 0 | 7.17 | 0–169 |
| Nov 4, 4:20 AM CST | 0 | 7.18 | 0–169 |
| Nov 4, 3:25 AM CST | 0 | 7.18 | 0–169 |
| Nov 4, 2:30 AM CST | 0 | 7.19 | 0–169 |
| Nov 4, 1:35 AM CST | 0 | 7.19 | 0–169 |
| Nov 4, 12:40 AM CST | 0 | 7.2 | 0–169 |
| Nov 3, 11:45 PM CST | 0 | 7.21 | 0–47 |
| Nov 3, 10:50 PM CST | 0 | 7.22 | 0–47 |
| Nov 3, 9:55 PM CST | 0 | 7.23 | 0–47 |
| Nov 3, 9:00 PM CST | 0 | 7.23 | 0–47 |
| Nov 3, 8:05 PM CST | 0 | 7.25 | 0–47 |
| Nov 3, 7:10 PM CST | 0 | 7.26 | 0–47 |
| Nov 3, 6:15 PM CST | 0 | 7.27 | 0–47 |
| Nov 3, 5:20 PM CST | 0 | 7.28 | 0–47 |
| Nov 3, 4:25 PM CST | 0 | 7.29 | 0–47 |
| Nov 3, 3:30 PM CST | 0 | 7.3 | 0–47 |
| Nov 3, 2:35 PM CST | 0 | 7.29 | 0–47 |
| Nov 3, 1:40 PM CST | 0 | 7.34 | 0–47 |
| Nov 3, 12:45 PM CST | 0 | 7.36 | 0–47 |
| Nov 3, 11:50 AM CST | 0 | 7.39 | 0–47 |
| Nov 3, 10:55 AM CST | 0 | 7.41 | 0–47 |
| Nov 3, 10:00 AM CST | 0 | 7.43 | 0–47 |
| Nov 3, 9:05 AM CST | 0 | 7.44 | 0–47 |
| Nov 3, 8:10 AM CST | 0 | 7.46 | 0–47 |
| Nov 3, 7:15 AM CST | 0 | 7.42 | 0–47 |
| Nov 3, 6:20 AM CST | 0 | 7.22 | 0–47 |
| Nov 3, 5:25 AM CST | 0 | 6.95 | 0–47 |
| Nov 3, 4:30 AM CST | 0 | 6.95 | 0–47 |
| Nov 3, 3:35 AM CST | 0 | 6.94 | 0–47 |
| Nov 3, 2:40 AM CST | 0 | 6.94 | 0–47 |
| Nov 3, 1:45 AM CST | 0 | 6.94 | 0–47 |
| Nov 3, 12:50 AM CST | 0 | 6.94 | 0–47 |
| Nov 2, 11:55 PM CST | 0 | 6.94 | 0–47 |
| Nov 2, 11:00 PM CST | 0 | 6.94 | 0–47 |
| Nov 2, 10:05 PM CST | 0 | 6.94 | 0–47 |
| Nov 2, 9:10 PM CST | 0 | 6.94 | 0–47 |
| Nov 2, 8:15 PM CST | 0 | 6.94 | 0–47 |
| Nov 2, 7:20 PM CST | 0 | 6.93 | 0–47 |
| Nov 2, 6:25 PM CST | 0 | 6.93 | 0–47 |
| Nov 2, 5:30 PM CST | 0 | 6.93 | 0–47 |
| Nov 2, 4:35 PM CST | 0 | 6.92 | 0–47 |
| Nov 2, 3:40 PM CST | 0 | 6.91 | 0–47 |
| Nov 2, 2:45 PM CST | 0 | 6.86 | 0–47 |
| Nov 2, 1:50 PM CST | 0 | 6.92 | 0–47 |
| Nov 2, 12:55 PM CST | 0 | 6.85 | 0–47 |
| Nov 2, 12:00 PM CST | 0 | 6.86 | 0–47 |
| Nov 2, 11:05 AM CST | 0 | 6.89 | 0–47 |
| Nov 2, 10:10 AM CST | 0 | 6.86 | 0–47 |
| Nov 2, 9:15 AM CST | 0 | 6.91 | 0–47 |
| Nov 2, 8:20 AM CST | 0 | 6.93 | 0–47 |
| Nov 2, 7:25 AM CST | 0 | 6.93 | 0–47 |
| Nov 2, 6:30 AM CST | 0 | 6.93 | 0–47 |
| Nov 2, 5:35 AM CST | 0 | 6.93 | 0–47 |
| Nov 2, 4:40 AM CST | 0 | 6.93 | 0–47 |
| Nov 2, 3:45 AM CST | 0 | 6.93 | 0–47 |
| Nov 2, 2:50 AM CST | 0 | 6.93 | 0–47 |
| Nov 2, 1:55 AM CST | 0 | 6.93 | 0–47 |
| Nov 2, 1:00 AM CST | 0 | 6.93 | 0–47 |
| Nov 2, 12:05 AM CST | 0 | 6.93 | 0–47 |
| Nov 1, 11:10 PM CST | 0 | 6.92 | 0–53 |
| Nov 1, 10:15 PM CST | 0 | 6.92 | 0–53 |
| Nov 1, 9:20 PM CST | 0 | 6.93 | 0–53 |
| Nov 1, 8:25 PM CST | 0 | 6.93 | 0–53 |
| Nov 1, 7:30 PM CST | 0 | 6.93 | 0–53 |
| Nov 1, 6:35 PM CST | 0 | 6.93 | 0–53 |
| Nov 1, 5:40 PM CST | 0 | 6.92 | 0–53 |
| Nov 1, 4:45 PM CST | 0 | 6.92 | 0–53 |
| Nov 1, 3:50 PM CST | 0 | 6.93 | 0–53 |
| Nov 1, 2:55 PM CST | 0 | 6.93 | 0–53 |
| Nov 1, 2:00 PM CST | 0 | 6.93 | 0–53 |
| Nov 1, 1:05 PM CST | 0 | 6.94 | 0–53 |
| Nov 1, 12:10 PM CST | 0 | 6.94 | 0–53 |
| Nov 1, 11:15 AM CST | 0 | 6.94 | 0–53 |
| Nov 1, 10:20 AM CST | 0 | 6.95 | 0–53 |
| Nov 1, 9:25 AM CST | 0 | 6.95 | 0–53 |
| Nov 1, 8:30 AM CST | 0 | 6.96 | 0–53 |
| Nov 1, 7:35 AM CST | 0 | 6.96 | 0–53 |
| Nov 1, 6:40 AM CST | 0 | 6.96 | 0–53 |
| Nov 1, 5:45 AM CST | 0 | 6.96 | 0–53 |
| Nov 1, 4:50 AM CST | 0 | 6.97 | 0–53 |
| Nov 1, 3:55 AM CST | 0 | 6.97 | 0–53 |
| Nov 1, 3:00 AM CST | 0 | 6.97 | 0–53 |
| Nov 1, 2:05 AM CST | 0 | 6.98 | 0–53 |
| Nov 1, 1:10 AM CST | 0 | 6.98 | 0–53 |
| Nov 1, 1:15 AM CDT | 0 | 6.99 | 0–53 |
| Nov 1, 12:20 AM CDT | 0 | 7 | 0–53 |
| Oct 31, 11:25 PM CDT | 0 | 7 | 0–60 |
| Oct 31, 10:30 PM CDT | 0 | 7.01 | 0–60 |
| Oct 31, 9:35 PM CDT | 0 | 7.01 | 0–60 |
| Oct 31, 8:40 PM CDT | 0 | 7.02 | 0–60 |
| Oct 31, 7:45 PM CDT | 0 | 7.03 | 0–60 |
| Oct 31, 6:50 PM CDT | 0 | 7.04 | 0–60 |
| Oct 31, 5:55 PM CDT | 0 | 7.04 | 0–60 |
| Oct 31, 5:00 PM CDT | 0 | 7.05 | 0–60 |
| Oct 31, 4:05 PM CDT | 0 | 7.06 | 0–60 |
| Oct 31, 3:10 PM CDT | 0 | 7.08 | 0–60 |
| Oct 31, 2:15 PM CDT | 0 | 7.09 | 0–60 |
| Oct 31, 1:20 PM CDT | 0 | 7.1 | 0–60 |
| Oct 31, 12:25 PM CDT | 0 | 7.12 | 0–60 |
| Oct 31, 11:30 AM CDT | 0 | 7.13 | 0–60 |
| Oct 31, 10:35 AM CDT | 0 | 7.15 | 0–60 |
| Oct 31, 9:40 AM CDT | 0 | 7.16 | 0–60 |
| Oct 31, 8:45 AM CDT | 0 | 7.18 | 0–60 |
| Oct 31, 7:50 AM CDT | 0 | 7.19 | 0–60 |
| Oct 31, 6:55 AM CDT | 0 | 7.21 | 0–60 |
| Oct 31, 6:00 AM CDT | 0 | 7.23 | 0–60 |
| Oct 31, 5:05 AM CDT | 0 | 7.26 | 0–60 |
| Oct 31, 4:10 AM CDT | 0 | 7.28 | 0–60 |
| Oct 31, 3:15 AM CDT | 0 | 7.31 | 0–60 |
| Oct 31, 2:20 AM CDT | 0 | 7.33 | 0–60 |
| Oct 31, 1:25 AM CDT | 0 | 7.36 | 0–60 |
| Oct 31, 12:30 AM CDT | 0 | 7.39 | 0–60 |
| Oct 30, 11:35 PM CDT | 0 | 7.42 | 0–67 |
| Oct 30, 10:40 PM CDT | 0 | 7.46 | 0–67 |
| Oct 30, 9:45 PM CDT | 0 | 7.5 | 0–67 |
| Oct 30, 8:50 PM CDT | 0 | 7.53 | 0–67 |
| Oct 30, 7:55 PM CDT | 0 | 7.55 | 0–67 |
| Oct 30, 7:00 PM CDT | 0 | 7.5 | 0–67 |
| Oct 30, 6:05 PM CDT | 0 | 7.56 | 0–67 |
| Oct 30, 5:10 PM CDT | 0 | 7.57 | 0–67 |
| Oct 30, 4:15 PM CDT | 0 | 7.46 | 0–67 |
| Oct 30, 3:20 PM CDT | 0 | 7.13 | 0–67 |
| Oct 30, 2:25 PM CDT | 0 | 6.91 | 0–67 |
| Oct 30, 1:30 PM CDT | 0 | 6.74 | 0–67 |
| Oct 30, 12:35 PM CDT | 0 | 6.71 | 0–67 |
| Oct 30, 11:40 AM CDT | 0 | 6.72 | 0–67 |
| Oct 30, 10:45 AM CDT | 0 | 6.69 | 0–67 |
| Oct 30, 9:50 AM CDT | 0 | 6.72 | 0–67 |
| Oct 30, 8:55 AM CDT | 0 | 6.71 | 0–67 |
| Oct 30, 8:00 AM CDT | 0 | 6.72 | 0–67 |
| Oct 30, 7:05 AM CDT | 0 | 6.72 | 0–67 |
| Oct 30, 6:10 AM CDT | 0 | 6.73 | 0–67 |
| Oct 30, 5:15 AM CDT | 0 | 6.73 | 0–67 |
| Oct 30, 4:20 AM CDT | 0 | 6.73 | 0–67 |
| Oct 30, 3:25 AM CDT | 0 | 6.73 | 0–67 |
| Oct 30, 2:30 AM CDT | 0 | 6.73 | 0–67 |
| Oct 30, 1:35 AM CDT | 0 | 6.73 | 0–67 |
| Oct 30, 12:40 AM CDT | 0 | 6.73 | 0–67 |
| Oct 29, 11:45 PM CDT | 0 | 6.73 | 0–12 |
| Oct 29, 10:50 PM CDT | 0 | 6.73 | 0–12 |
| Oct 29, 9:55 PM CDT | 0 | 6.73 | 0–12 |
| Oct 29, 9:00 PM CDT | 0 | 6.74 | 0–12 |
| Oct 29, 8:45 PM CDT | 0 | 6.74 | 0–12 |
Map of USGS gauge 08171350 and the river around it
Where Blanco Rv at San Marcos, TX sits, with 5 other gauges 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 Texas Parks and Wildlife uses are 70°F and 74°F.
Normal for Nov 5: 0–158 ft³/s (middle half of 11 years of record). Now: 0 ft³/s, normal.
Normal for this date. 0 ft³/s is between the 25th and 75th percentiles of daily mean flow for Nov 5 at this gauge over 11 years of record (2016–2026): 10th 0, 25th 0, median 1.1, 75th 158, 90th 334 ft³/s.
Daily means on record for Nov 5: lowest 0 ft³/s, highest 355 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).
Steady over 24 hours (+0% discharge). 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.
Species list not on file for this gauge. Check the Texas Parks and Wildlife Department: Texas rainbow trout stocking schedule · Texas fishing regulations.
Below NWS action stage. The National Weather Service reports this gauge below its action stage. That is not a statement that wading is safe.
Flood categories: action stage, minor, moderate and major flooding (National Weather Service)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.
Below NWS action stage. The National Weather Service reports this gauge below its action stage. That is not a statement that wading is safe.
NWS observed 7.11 ft stage at Nov 5, 6:45 PM CST (NWS gauge BSMT2; its stage datum can differ from the USGS gauge height).
Forecasts are issued routinely year-round.
Open the NWS gauge page · What the categories mean (National Weather Service)
Checked Nov 5, 7:57 PM CST; 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.