Smith Gully at SH146 water level

Harris County Flood Warning System gauge 1725 · Smith Gully · Cedar Bayou watershed

10.14 ft

water surface elevation, Oct 19, 2026 at 7:34 AM CDT · 28 hours ago

Below top of bank: 17.1 ft
Top of bank: 27.2 ft
Lowest since Sep 11: 10.14 ft
Highest since Sep 11: 10.49 ft
Usual range: 10.23 to 10.37 ft
Latest vs usual: Below usual range

This gauge's most recent reading is from Oct 19, 2026 at 7:34 AM CDT (28 hours ago). It may not reflect conditions now.

Of the 252 readings stored for this gauge, 0.0% were lower than the reading above. The closest this gauge has come to its top of bank in that period is 16.7 ft.

No National Weather Service alert covering Harris County was active when this page was generated (Oct 20, 2026 at 11:20 AM CDT). Alerts are issued and expire at any time; the current list is at alerts.weather.gov.

Last 7 days

Hourly averages of readings as published. The shaded band is this gauge's usual range: the middle 80% of its readings since Sep 11. This gauge reports about every 240 minutes, and only when its value changes, so gaps in the line are normal.

Most recent hourly readings
Time	Level	Below top of bank
Oct 19, 7:00 AM CDT	10.14 ft	17.1 ft
Oct 18, 11:00 PM CDT	10.29 ft	16.9 ft
Oct 18, 11:00 AM CDT	10.27 ft	16.9 ft
Oct 18, 7:00 AM CDT	10.29 ft	16.9 ft
Oct 18, 3:00 AM CDT	10.18 ft	17.0 ft
Oct 17, 11:00 PM CDT	10.22 ft	17.0 ft
Oct 17, 3:00 PM CDT	10.25 ft	16.9 ft
Oct 17, 12:00 PM CDT	10.15 ft	17.0 ft
Oct 17, 11:00 AM CDT	10.16 ft	17.0 ft
Oct 17, 7:00 AM CDT	10.21 ft	17.0 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 mean sea level, so SH146 reads around 10 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 27.2 ft.

The bottom of the channel here sits at 9.3 ft, so the channel is roughly 17.9 ft deep at this crossing. Harris County publishes the top-of-bank figure with each reading; it is their reference, not an estimate made here.

Daily highs and lows since September 11, 2026

Download the readings

smith-gully-at-sh146.csv (CSV): every reading stored for this gauge since September 11, 2026, 252 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.

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<p style="margin:4px 0 0;font-size:13px"><a href="https://gulfcoastgauges.com/harris-county/smith-gully-at-sh146.html">Smith Gully at SH146 water level</a> from Gulf Coast Gauges</p>

In past storms

Storm	Peak	Peak time	Rise	Below bank at peak
October 1–2, 2026	10.46 ft	Oct 3, 2026 at 3:34 PM CDT	0.1 ft	16.7 ft

Storms are runs of National Weather Service flood alerts for Harris County; each storm page lists every gauge's peak.

USGS gauge nearby

Cedar Bayou at I-10 near Mont Belvieu (USGS 08067505), 0.8 mi away, read 2.05 ft at Oct 20, 2026 at 11:05 AM CDT, 10.9 ft below the NWS minor flood stage of 13.0 ft. Its zero is at 0 ft NAVD88, so it also reports water surface elevation.

All gauges in this watershed: Cedar Bayou watershed water levels.