Onion Creek at Twin Creeks Rd near Manchaca water level

Name: Onion Creek at Twin Creeks Rd near Manchaca water level (U.S. Geological Survey)
Creator: U.S. Geological Survey
License: https://www.usgs.gov/information-policies-and-instructions/copyrights-and-credits

River gauge, Onion Creek, Texas, United States

Directions

Very high for late October

Water level

6.58ft Steady over the last 24 hours

Measured Oct 21, 2026, 04:05 AM CDT (9 min ago)

Flow: 1.1 cfs

History

7 days 30 days 1 year Years compared

20252026

Water level Normal range (10–90 %)

What this means

Onion Creek at Twin Creeks Rd near Manchaca is well above normal at 6.58 ft.

The median for late October is 4.18 ft, based on 22 years of readings, so the river stage is 2.40 ft above typical. On the same day last year the reading was 2.40 ft, a difference of +4.18 ft.

It has barely moved over the past 24 hours. In the last month it has stayed between 3.59 ft and 6.59 ft.

That stands out in fall, when many rivers are usually near their lowest.

Compared with 22 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date: 4.18 ft2.40 ft above the median for this date
Normal for this date: 3.51 ft – 4.84 ft8 years in 10 fall in this range (22 years of records)
Same day last year: 2.40 ft+4.18 ft
Lowest and highest in 30 days: 3.59 ft – 6.59 ft
Lowest and highest in 12 months: 2.32 ft – 6.77 ft

Flood levels and safety

Most flood deaths in the US happen in vehicles. Six inches of fast water can knock an adult off their feet, and a foot or two can float a car. If a road is covered, turn around.

Readings can change quickly after heavy rain upstream, so check again before heading near the water.

Weather at the gauge

No rain in the last 3 days.

20 Tue 82° 57° – Wind 7 mph

21 Wed 82° 57° – Wind 8 mph

22 Thu 85° 59° – Wind 9 mph

23 Fri 84° 63° – Wind 13 mph

24 Sat 85° 60° – Wind 15 mph

25 Sun 82° 61° – Wind 13 mph

26 Mon 82° 57° – Wind 12 mph

Forecast: Open-Meteo

Sunrise 07:38 AM Sunset 06:55 PM Daylight 11 hr, 17 min Waxing gibbous 76%

Map

Other gauges on Onion Creek

Gauge	Level	Compared with normal	24 hours	Distance
Onion Creek near DriftwoodRiver gauge, Onion Creek	1.08 ft	Low	−0.02 ft	12 mi
Onion Creek at US Hwy 183, AustinRiver gauge, Onion Creek	4.37 ft	Normal	+0.03 ft	9 mi

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Slaughter Creek at FM 2304 near AustinRiver gauge, Slaughter Creek	−0.20 ft	Very low	±0	2.6 mi
Bear Creek at Spillar Ranch Rd near ManchacaRiver gauge, Bear Creek	0.0 cfs	Normal	±0	5.7 mi
Williamson Creek at Manchaca Rd, AustinRiver gauge, Williamson Creek	1.89 ft	Very low	±0	7 mi
Williamson Creek at Jimmy Clay Rd, AustinRiver gauge, Williamson Creek	0.0 cfs	Low	±0	7 mi
Williamson Creek at Brush Cntry Blvd, Oak HillRiver gauge, Williamson Creek	0.0 cfs	Normal	±0	7 mi
Bear Creek below FM 1826 near DriftwoodRiver gauge, Bear Creek	2.51 ft	Normal	±0	7 mi
Slaughter Creek at FM 1826 near AustinRiver gauge, Slaughter Creek	3.27 ft	Low	±0	8 mi
Barton Creek at Loop 360, AustinRiver gauge, Barton Creek	1.68 ft	Very low	−0.01 ft	8 mi

Questions and answers

Is Onion Creek at Twin Creeks Rd near Manchaca higher than last year?

Yes, it is 4.18 ft higher than on the same day last year, when the reading was 2.40 ft.

What is a normal level for Onion Creek at Twin Creeks Rd near Manchaca in late October?

The median for late October is 4.18 ft. In 8 years out of 10 the reading falls between 3.51 ft and 4.84 ft, based on 22 years of records.

Is gage height the same as water depth?

No. Gage height is measured from a fixed reference point chosen by the agency, so a reading of 10 ft does not mean the river is 10 ft deep.

What is the water level of Onion Creek at Twin Creeks Rd near Manchaca today?

On Oct 21, 2026, 04:05 AM CDT, the water level was 6.58 ft. Steady over the last 24 hours.

Is Onion Creek at Twin Creeks Rd near Manchaca rising or falling?

Steady over the last 24 hours. Up 2.92 ft over the last 7 days.

Is the level of Onion Creek at Twin Creeks Rd near Manchaca normal?

Very high for late October. Compared with 22 years of daily readings for this time of year.

How often is this data updated?

The U.S. Geological Survey publishes a new reading every 15 minutes. This page refreshes within minutes of each update.

For specialists

Station codes, datum, parameters, data quality and downloads

Operator: U.S. Geological Survey
Station code: usgs:08158827 (Agency page)
Coordinates: 30.12632, -97.82112 (WGS84)
Vertical datum: NAVD88
Update interval: every 15 minutes
Licence: Public domain. Data: U.S. Geological Survey (USGS), provisional data subject to revision

Published series

Parameter	Last value	Time (UTC)	Quality
Water level	6.58 ft	2026-10-21 09:05	Provisional
Flow	1.1 cfs	2026-10-21 09:00	Provisional

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How to cite

U.S. Geological Survey: Onion Creek at Twin Creeks Rd near Manchaca (usgs:08158827). Accessed October 21, 2026 via Nivelmap, https://nivelmap.com/en/united-states/texas/onion-creek-at-twin-creeks-rd-near-manchaca

How we check values

Each reading is stored as published. We hold back values that jump faster than physically plausible and show the measurement time with every value.

Readings are provisional, can be delayed or wrong and are not a flood warning. Read the disclaimer