Luce Bayou at SH 321 water level

Harris County Flood Warning System gauge 1960 · Luce Bayou · Luce Bayou watershed

86.28 ft

water surface elevation, Oct 20, 2026 at 11:09 AM CDT · 2 hours ago

Below top of bank: 10.7 ft
Top of bank: 97.0 ft
Lowest since Sep 11: 86.28 ft
Highest since Sep 11: 87.36 ft
Usual range: 86.28 to 86.88 ft
Latest vs usual: Within usual range

Of the 260 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 9.6 ft.

No National Weather Service alert covering Harris County was active when this page was generated (Oct 20, 2026 at 1:35 PM 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 20, 11:00 AM CDT	86.28 ft	10.7 ft
Oct 20, 7:00 AM CDT	86.28 ft	10.7 ft
Oct 20, 3:00 AM CDT	86.28 ft	10.7 ft
Oct 19, 11:00 PM CDT	86.28 ft	10.7 ft
Oct 19, 7:00 PM CDT	86.28 ft	10.7 ft
Oct 19, 3:00 PM CDT	86.28 ft	10.7 ft
Oct 19, 11:00 AM CDT	86.28 ft	10.7 ft
Oct 19, 7:00 AM CDT	86.28 ft	10.7 ft
Oct 19, 3:00 AM CDT	86.28 ft	10.7 ft
Oct 18, 11:00 PM CDT	86.28 ft	10.7 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 SH 321 reads around 86 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 97.0 ft.

The bottom of the channel here sits at 86.0 ft, so the channel is roughly 11.0 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

luce-bayou-at-sh-321.csv (CSV): every reading stored for this gauge since September 11, 2026, 260 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.

<iframe src="https://gulfcoastgauges.com/embed/luce-bayou-at-sh-321.html" title="Luce Bayou at SH 321 water level" width="340" height="196" style="border:0;max-width:100%" loading="lazy"></iframe>
<p style="margin:4px 0 0;font-size:13px"><a href="https://gulfcoastgauges.com/harris-county/luce-bayou-at-sh-321.html">Luce Bayou at SH 321 water level</a> from Gulf Coast Gauges</p>

In past storms

Storm	Peak	Peak time	Rise	Below bank at peak
October 1–2, 2026	87.10 ft	Oct 3, 2026 at 11:39 AM CDT	0.8 ft	9.9 ft

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

Other gauges on Luce Bayou

Readings from the rest of the Luce Bayou 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.

Crossing	Level	Below top of bank	Reading taken
SH 99	54.81 ft	15.7 ft	Oct 20, 2026 at 11:13 AM CDT
FM	42.23 ft	7.8 ft	Oct 20, 2026 at 11:59 AM CDT

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