Mustang Bayou at SH 6 near Alvin water level
USGS gauge 08077888 · Brazoria County · NWS gauge MUGT2
gage height, Oct 23, 2026 at 2:35 PM CDT · 15 minutes ago
- Below NWS minor flood stage
- 7.8 ft
- NWS action stage
- 37.0 ft
- NWS minor flood stage
- 40.0 ft
- NWS moderate flood stage
- 42.5 ft
- NWS major flood stage
- 44.0 ft
- Usual range
- 31.98 to 32.17 ft
USGS marks recent readings as provisional: they can be revised after review.
- Air Quality Alert — issued Oct 22, 2026 at 5:16 PM CDT, expires Oct 23, 2026 at 9:30 PM CDT.
Air Quality Alert issued October 22 at 5:16PM CDT by NWS Houston/Galveston TX
Text as issued by NWS Houston/Galveston TX.
Last 7 days
Hourly averages of USGS readings. The shaded band is this gauge's usual range: the middle 80% of its readings since September 11, 2026.
How to read this gauge
Gage height is the height of the water surface above the gauge's zero point. This gauge's zero is set at 0 ft NAVD88, so its gage height is the water surface elevation above that datum. It is not a water depth.
The flood stages are the National Weather Service's, on the same scale as the gage height; they are the NWS's references for this location, not estimates made here.
Daily highs and lows since September 11, 2026
In past storms
| Storm | Peak | Peak time | Rise | Compared with its record |
|---|---|---|---|---|
| October 1–2, 2026 | 32.28 ft | Oct 3, 2026 at 3:15 AM CDT | 0.3 ft | — |
Download the readings
mustang-bayou-at-sh-6-near-alvin.csv (CSV): every reading stored for this gauge since September 11, 2026, 4,042 rows, with time in UTC and Central, gage height in feet, and the USGS approval status.
Source. Gage height from the U.S. Geological Survey; flood stages and historic crests from the NWS National Water Prediction Service. This site is not affiliated with either agency.