S Fk San Gabriel River at Georgetown water level

Name: S Fk San Gabriel River at Georgetown 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, S Fk San Gabriel River, Texas, United States

Directions

Low for mid-October

Water level

1.91ft Steady over the last 24 hours

Measured Oct 20, 2026, 02:30 AM CDT (25 min ago)

Flow: 9.0 cfs

History

7 days 30 days 1 year Years compared

20252026

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

What this means

The S Fk San Gabriel River at Georgetown is running below normal at 1.91 ft.

The median for mid-October is 2.40 ft, based on 39 years of readings, so the river stage is 0.49 ft below typical. It is 7.09 ft below the flood stage of 9.00 ft. On the same day last year the reading was 1.67 ft, a difference of +0.24 ft.

It has barely moved over the past 24 hours. Without real rain upstream, that is unlikely to change quickly. In the last month it has stayed between 1.59 ft and 2.63 ft.

Fall is often low-water season on rivers, and it usually takes a few days of steady rain to change that.

Compared with 39 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date: 2.40 ft0.49 ft below the median for this date
Normal for this date: 1.67 ft – 3.15 ft8 years in 10 fall in this range (39 years of records)
Same day last year: 1.67 ft+0.24 ft
Lowest and highest in 30 days: 1.59 ft – 2.63 ft
Lowest and highest in 12 months: 1.59 ft – 5.85 ft
Highest on record: 41.00 ftApril 24, 1956

Floating and fishing near S Fk San Gabriel River at Georgetown

Low water exposes gravel bars that make good wading access, but some boat ramps may be left high and dry.

Flood stage here is 9.00 ft, 7.09 ft above the current reading. Beyond it, the National Weather Service also defines moderate and major flood stages.

What happens at each level

41.00 ft: Flood of record from April 24, 1956. Catastrophic flooding from Georgetown to Granger Lake. Residences along San Gabriel Village Blvd near the merger of the north and south forks of the San Gabriel River in Georgetown flood. Georgetown Parks and Recreation Administration buildings have become isolated. Flood waters have reached the bottom of the Ronald W Reagan Blvd bridge. Interstate 35 and the Southwest Bypass are the few bridges between Georgetown and Granger Lake that have not been overtopped.
37.00 ft: Major lowland flooding is ongoing with flood waters up to the borrom of bridges on State Highway 29 bridge between Georgetown and Jonah, and North Austin Ave in Georgetown. The bridges on FM 1660 south of Jonah and North County Road 366 have flooded. South Rock Street in Georgetown, near Blue Hole Park, has flooded.
31.00 ft: Major lowland flooding has reached the height of the June 27, 2007 flood. Secondary roads that cross the river are starting to be impacted by flood waters. The approaches of County Road 279 are flooded, and water has reached the botttom of the County Road 366 bridge.
28.00 ft: Major lowland flooding threatens residences near the floodplain between Libery Hill and Georgetown. Lowest parts of Orchard Drive and County Road 270 flood.
26.00 ft: Major lowland flooding closes many streets and roads. Much of San Gabriel Park downstream floods. Homes in the lowest portions of the floodplain from above Georgetown to Jonah to Granger Lake along the San Gabriel are likely flooded. County Road 100 between State Highway 29 and McShepherd Road has flooded.
23.00 ft: Moderate lowland flooding inundates many secondary and primary roads near the San Gabriel River. Facilities and equipment well into the flood plain are flooded. Residents of lowest homes in the flood plain above Georgetown to Granger Lake should monitor NOAA Weather Radio for developing heavy rain and flood conditions.
20.00 ft: Moderate lowland flooding closes secondary and primary roads near the river upstream of Georgetown to Granger Lake. San Gabriel Park is severely flooded.
17.00 ft: Moderate lowland flooding inundates many secondary and primary roads near the San Gabriel River from the headwaters of the South Fork to Granger Lake. Lowest pavillions and playground equipment in the San Gabriel Park have flooded. Flow threatens to flood County Road 100 between State Highway 29 and McSheperd Road near Jonah.
13.00 ft: Moderate lowland flooding inundates secondary roads and low water crossings from above Georgetown to Lake Granger. Flow enters the lowest areas of San Gabriel Park in Georgetown, and Blue Hole Park Road and restrooms have flooded.
9.00 ft: Minor lowland flooding reaches low areas of the floodplain and overtops pedestrian bridges of the San Gabriel Park in Georgetown. Residents of lowest homes in the floodplain above Georgetown to Granger Lake should monitor NOAA Weather Radio for developing heavy rain and flood conditions.
7.00 ft: Flow exceeds the lowest sections of the banks within the floodplain, breaks banks for lowest sections of Blue Hole Park, and flow overtops the lowest pedestrian bridge in San Gabriel Park.
1.91 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: 10 %.

Rank	Level	Date
1	41.00 ft	April 24, 1956
2	37.36 ft	July 5, 2025
3	31.65 ft	June 27, 2007
4	27.06 ft	November 15, 2001
5	24.60 ft	September 3, 1981
6	23.93 ft	September 22, 2018
7	21.98 ft	September 8, 2010
8	19.94 ft	February 3, 1986
9	17.12 ft	May 24, 2015
10	16.88 ft	October 16, 2018

Weather at the gauge

The forecast is not available right now.

Sunrise 07:37 AM Sunset 06:55 PM Daylight 11 hr, 18 min First quarter 66%

Map

Other gauges on the S Fk San Gabriel River

Gauge	Level	Compared with normal	24 hours	Distance
S Fk San Gabriel River at SH 1869 near Liberty HillRiver gauge, S Fk San Gabriel River	4.33 ft	No reference yet	+0.01 ft	15 mi
S Fk San Gabriel River at Hwy 183 near LeanderRiver gauge, S Fk San Gabriel River	851.93 ft	No reference yet	±0	10 mi

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
N Fk San Gabriel River near GeorgetownRiver gauge, N Fk San Gabriel River	4.20 ft	Normal	+0.01 ft	2.8 mi
Lake Georgetown near GeorgetownLake, Lake Georgetown	784.45 ft	Very high	−0.01 ft	3.6 mi
UBC Dam 16 near Round RockReservoir, UBC Dam 16	712.93 ft	Very low	−0.01 ft	5.5 mi
Berry Creek at Airport Rd near GeorgetownRiver gauge, Berry Creek	9.24 ft	Low	±0	5.6 mi
UBC Dam 11 near Round RockReservoir, UBC Dam 11	714.59 ft	Normal	±0	5.9 mi
UBC Dam 14 near Round RockReservoir, UBC Dam 14	713.08 ft	Very low	−0.01 ft	6.0 mi
UBC Dam 12 near Round RockReservoir, UBC Dam 12	757.69 ft	Normal	±0	6.2 mi
UBC Dam 5 near LeanderReservoir, UBC Dam 5	883.99 ft	Normal	−0.02 ft	6 mi

Questions and answers

Is the S Fk San Gabriel River at Georgetown higher than last year?

Yes, it is 0.24 ft higher than on the same day last year, when the reading was 1.67 ft.

What is flood stage for the S Fk San Gabriel River at Georgetown?

The official flood stage is 9.00 ft. The level is currently 7.09 ft below it.

What is a normal level for the S Fk San Gabriel River at Georgetown in mid-October?

The median for mid-October is 2.40 ft. In 8 years out of 10 the reading falls between 1.67 ft and 3.15 ft, based on 39 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 Fk San Gabriel River at Georgetown today?

On Oct 20, 2026, 02:30 AM CDT, the water level was 1.91 ft. Steady over the last 24 hours.

Is S Fk San Gabriel River at Georgetown rising or falling?

Steady over the last 24 hours. Down 0.08 ft over the last 7 days.

Is the level of S Fk San Gabriel River at Georgetown normal?

Low for mid-October. Compared with 39 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:08104900 (Agency page)
Coordinates: 30.62575, -97.69112 (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	1.91 ft	2026-10-20 07:30	Provisional
Flow	9.0 cfs	2026-10-20 07:30	Provisional

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How to cite

U.S. Geological Survey: S Fk San Gabriel River at Georgetown (usgs:08104900). Accessed October 20, 2026 via Nivelmap, https://nivelmap.com/en/united-states/texas/s-fk-san-gabriel-river-at-georgetown

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