Gulf Coast Gauges

Marys Creek at FM 1128 water level

Brazoria Drainage District 4 gauge 4920 · Marys Creek · published on the Harris County Flood Warning System

40.55 ft

water surface elevation, Oct 21, 2026 at 5:28 PM CDT · 7 minutes ago

Below top of bank
9.1 ft
Top of bank
49.6 ft
Lowest since Oct 21
40.38 ft
Highest since Oct 21
40.62 ft

This gauge has been recorded here since October 21, 2026 (11 readings so far). Its usual range and how today compares with its history appear once it has 14 days of readings.

The National Weather Service alerts shown on this site cover the Harris County forecast zones only. For watches and warnings covering this area, see alerts.weather.gov.

Last 7 days

40.4 40.6 40.9

Hourly averages of readings as published. This gauge reports only when its value changes, so gaps in the line are normal.

Most recent hourly readings
TimeLevelBelow top of bank
Oct 21, 5:00 PM CDT40.50 ft9.1 ft
Oct 21, 4:00 PM CDT40.44 ft9.2 ft
Oct 21, 3:00 PM CDT40.62 ft9.0 ft
Oct 21, 2:00 PM CDT40.46 ft9.1 ft
Oct 21, 12:00 PM CDT40.48 ft9.1 ft
Oct 21, 11:00 AM CDT40.39 ft9.2 ft
Oct 21, 8:00 AM CDT40.41 ft9.2 ft

How to read this gauge

The number above is an elevation, not a water depth. It is the height of the water surface above a fixed reference level, so FM 1128 reads around 40 ft even when the channel is low. What matters is the distance to the top of bank: the elevation at which water reaches the top of the channel at this location. For this gauge that is 49.6 ft.

The bottom of the channel here sits at 39.6 ft, so the channel is roughly 10.0 ft deep at this crossing. Brazoria Drainage District 4 publishes the top-of-bank figure with each reading; it is their reference, not an estimate made here.

Daily highs and lows since October 21, 2026

40.4 40.6 40.9 2026-10-21 – 2026-10-21 · bars are daily low to high

Download the readings

marys-creek-at-fm-1128.csv (CSV): every reading stored for this gauge since October 21, 2026, 11 rows, updated with this page. Columns: time in UTC, time in Central, water surface elevation, top of bank, and distance below top of bank, all in feet. The source and accuracy notes below apply to the file too.

Put this gauge on your website

HOAs, MUDs, civic clubs and schools can show this gauge's latest reading on their own site. Paste this HTML where it should appear; the card updates with this page. More gauges.

Other gauges on Marys Creek

Readings from the rest of the Marys Creek gauge network, each at its own most recent reading. Elevations fall as the channel runs downstream, so compare the below top of bank column rather than the raw levels.

CrossingLevelBelow top of bankReading taken
Veterans Drive37.48 ft8.0 ftOct 21, 2026 at 3:59 PM CDT
Longherridge29.67 ft9.1 ftOct 21, 2026 at 3:05 PM CDT

All Brazoria Drainage District 4 gauges: Brazoria Drainage District 4 water levels.