Llano River near Mason water level

Name: Llano River near Mason 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, Llano River, Texas, United States

Directions

Very high for mid-October

Water level

7.04ft Down 0.48 ft over the last 24 hours

Measured Oct 18, 2026, 10:45 PM CDT (32 min ago)

Flow: 470 cfs

History

7 days 30 days 1 year Years compared

20252026

Water level Normal range (10–90 %) Minor flood stage

What this means

High water at Llano River near Mason: the latest reading is 7.04 ft, well above normal for mid-October.

That puts it 5.99 ft above the median of 1.05 ft for mid-October, based on 27 years of readings. It is 10.96 ft below the flood stage of 18.00 ft. A year ago it stood at 5.26 ft (+1.78 ft).

It is still going down, by 0.48 ft over the past 24 hours. The 30-day range is 5.92 ft – 12.55 ft.

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

Compared with 27 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date: 1.05 ft5.99 ft above the median for this date
Normal for this date: 0.47 ft – 5.18 ft8 years in 10 fall in this range (27 years of records)
Same day last year: 5.26 ft+1.78 ft
Lowest and highest in 30 days: 5.92 ft – 12.55 ft
Lowest and highest in 12 months: 5.21 ft – 22.32 ft
Highest on record: 37.00 ftSeptember 8, 1980

Staying safe in high water

Flood stage is only the first threshold. Above it the National Weather Service sets moderate and major flood stages, and the forecast crest tells you which of those the river is expected to reach.

Upstream gauges on the same river usually show a rise first, which is a useful early warning.

What happens at each level

28.00 ft: Major lowland flooding will occur. Roads and low water crossings will be flooded and impassible.
24.00 ft: Moderate lowland flooding will occur. Secondary roads and low water crossings will be flooded and impassible.
18.00 ft: Minor lowland flooding will occur. Secondary roads and low water crossings will become flooded.
7.04 ft: Right now

Impact statements from the U.S. National Weather Service.

Highest crests on record

Chance of at least minor flooding in October to December: 9 %.

Rank	Level	Date
1	37.00 ft	September 8, 1980
2	34.21 ft	October 16, 2018
3	32.00 ft	November 4, 2000
4	31.33 ft	June 13, 2008
5	29.91 ft	July 4, 2025
6	26.97 ft	July 18, 2026
7	26.30 ft	October 13, 1973
8	25.22 ft	December 31, 1984
9	25.06 ft	October 13, 1981
10	24.08 ft	July 24, 2024

Weather at the gauge

The forecast is not available right now.

Sunrise 07:42 AM Sunset 07:02 PM Daylight 11 hr, 20 min First quarter 55%

Map

Other gauges on the Llano River

Gauge	Level	Compared with normal	24 hours	Distance
Llano River near JunctionRiver gauge, Llano River	1.38 ft	Low	−0.08 ft	39 mi
Llano River at LlanoRiver gauge, Llano River	2.90 ft	Very high	−0.22 ft	27 mi

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Beaver Creek near MasonRiver gauge, Beaver Creek	6.28 ft	Very high	+0.02 ft	1.4 mi
Pedernales River near FredericksburgRiver gauge, Pedernales River	7.61 ft	Very high	+0.01 ft	34 mi
Brady Creek at BradyRiver gauge, Brady Creek	5.98 ft	High	−0.03 ft	36 mi
Sandy Creek near KingslandRiver gauge, Sandy Creek	4.90 ft	Normal	−0.07 ft	39 mi
Johnson Creek near IngramRiver gauge, Johnson Creek	−0.10 ft	Very low	+0.02 ft	40 mi
Guadalupe River above Bear Creek at KerrvilleRiver gauge, Guadalupe River	2.91 ft	Normal	+0.01 ft	41 mi
S Llano River at Flat Rock Ln at JunctionRiver gauge, S Llano River	2.60 ft	Normal	−0.02 ft	42 mi
N Llano River near JunctionRiver gauge, N Llano River	8.92 ft	Very high	−0.01 ft	43 mi

Questions and answers

How does the Llano River near Mason compare with last year?

It is 1.78 ft higher than on the same day last year, when the reading was 5.26 ft.

What is flood stage for the Llano River near Mason?

The official flood stage is 18.00 ft. The level is currently 10.96 ft below it.

What is a normal level for the Llano River near Mason in mid-October?

The median for mid-October is 1.05 ft. In 8 years out of 10 the reading falls between 0.47 ft and 5.18 ft, based on 27 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 Llano River near Mason today?

On Oct 18, 2026, 10:45 PM CDT, the water level was 7.04 ft. Down 0.48 ft over the last 24 hours.

Is Llano River near Mason rising or falling?

Down 0.48 ft over the last 24 hours. Up 0.38 ft over the last 7 days.

Is the level of Llano River near Mason normal?

Very high for mid-October. Compared with 27 years of daily readings for this time of year.

For specialists

Station codes, datum, parameters, data quality and downloads

Operator: U.S. Geological Survey
Station code: usgs:08150700 (Agency page)
Coordinates: 30.66074, -99.10922 (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	7.04 ft	2026-10-19 03:45	Provisional
Flow	470 cfs	2026-10-19 03:45	Provisional

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How to cite

U.S. Geological Survey: Llano River near Mason (usgs:08150700). Accessed October 19, 2026 via Nivelmap, https://nivelmap.com/en/united-states/texas/llano-river-near-mason

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