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S Llano River at Flat Rock Ln at Junction water level

River gauge, S Llano River, Texas, United States

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Right now

Normal for mid-October

Water level

2.58ft Steady over the last 24 hours

Flow
130 cfs
2.0 2.5 3.0 3.5

History

History
35810ftOct 16Oct 17Oct 18Oct 19Oct 2035810ftOct 16Oct 18Oct 20
35810ftSep 21Sep 28Oct 5Oct 12Oct 2035810ftSep 21Oct 5Oct 20
510ftOct 2025Jan 2026Apr 2026Jul 2026Oct 2026510ftOct 2025Apr 2026Oct 2026
510ftJanMarMayJulSepNov2026510ftJanAprJulOct2026

20252026

Water level Normal range (10–90 %)

What this means

The S Llano River at Flat Rock Ln at Junction is at 2.58 ft, in the normal range for mid-October.

That puts it 0.21 ft above the median of 2.37 ft for mid-October, based on 14 years of readings. A year ago it stood at 2.05 ft (+0.53 ft).

The level has held steady over the past 24 hours. In the last month it has stayed between 2.29 ft and 7.84 ft.

Fall is often low-water season on rivers, until steadier rain returns.

Compared with 14 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date
2.37 ft0.21 ft above the median for this date
Normal for this date
2.12 ft – 3.59 ft8 years in 10 fall in this range (14 years of records)
Same day last year
2.05 ft+0.53 ft
Lowest and highest in 30 days
2.29 ft – 7.84 ft
Lowest and highest in 12 months
2.04 ft – 13.58 ft

Floating and fishing near S Llano River at Flat Rock Ln at Junction

Normal flows mean predictable rapids and good access at most put-ins.

Weather at the gauge

Rain in the last 3 days: 1.49 in. Rain that falls upstream can take hours or days to show up at a river gauge.

18 Sun 68° 41° – Wind 5 mph
19 Mon 74° 51° – Wind 7 mph
20 Tue 77° 55° – Wind 8 mph
21 Wed 83° 58° – Wind 8 mph
22 Thu 84° 63° – Wind 11 mph
23 Fri 82° 60° – Wind 15 mph
24 Sat 78° 60° – Wind 15 mph

Forecast: Open-Meteo

Sunrise 07:45 AM Sunset 07:04 PM Daylight 11 hr, 18 min First quarter 64%

Map

Nearby gauges

Gauge Level Compared with normal 24 hours Distance
Llano River near JunctionRiver gauge, Llano River 1.34 ft Low −0.05 ft 3.1 mi
N Llano River near JunctionRiver gauge, N Llano River 8.91 ft Very high −0.01 ft 3.1 mi
San Saba River at MenardRiver gauge, San Saba River 2.86 ft Normal −0.05 ft 30 mi
Noyes Canal at Diversion pt near MenardCanal gauge, Noyes Canal 3.68 ft High −0.01 ft 31 mi
San Saba River at FM 864 near Fort McKavettRiver gauge, San Saba River 2.22 ft Very high +0.01 ft 31 mi
N Fk Guadalupe River near HuntRiver gauge, N Fk Guadalupe River 1.54 ft Normal +0.01 ft 37 mi
Guadalupe River at HuntRiver gauge, Guadalupe River 7.72 ft Low +0.01 ft 39 mi
Johnson Creek near IngramRiver gauge, Johnson Creek −0.11 ft Very low ±0 39 mi

Questions and answers

How does the S Llano River at Flat Rock Ln at Junction compare with last year?

It is 0.53 ft higher than on the same day last year, when the reading was 2.05 ft.

What is a normal level for the S Llano River at Flat Rock Ln at Junction in mid-October?

The median for mid-October is 2.37 ft. In 8 years out of 10 the reading falls between 2.12 ft and 3.59 ft, based on 14 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 S Llano River at Flat Rock Ln at Junction today?

On Oct 19, 2026, 07:55 PM CDT, the water level was 2.58 ft. Steady over the last 24 hours.

Is S Llano River at Flat Rock Ln at Junction rising or falling?

Steady over the last 24 hours. Steady over the last 7 days.

Is the level of S Llano River at Flat Rock Ln at Junction normal?

Normal for mid-October. Compared with 14 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:08149900 (Agency page)
Coordinates
30.47901, -99.77804 (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

ParameterLast valueTime (UTC)Quality
Water level 2.58 ft 2026-10-20 00:55 Provisional
Flow 130 cfs 2026-10-20 00:55 Provisional

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How to cite

U.S. Geological Survey: S Llano River at Flat Rock Ln at Junction (usgs:08149900). Accessed October 20, 2026 via Nivelmap, https://nivelmap.com/en/united-states/texas/s-llano-river-at-flat-rock-ln-at-junction

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.