W Fk San Jacinto River above Lake Houston near Porter water level

Name: W Fk San Jacinto River above Lake Houston near Porter 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, W Fk San Jacinto River, Texas, United States

Directions

Very high for mid-October

Water level

56.55ft Steady over the last 24 hours

Measured Oct 20, 2026, 08:45 PM CDT (1 hour ago)

Flow: 42.8 cfs

History

7 days

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

What this means

The W Fk San Jacinto River above Lake Houston near Porter is well above normal at 56.55 ft.

That puts it 45.36 ft above the median of 11.19 ft for mid-October, based on 18 years of readings. It is 24.45 ft below the flood stage of 81.00 ft. The record high is 94.87 ft, set on August 29, 2017.

The level has held steady over the past 24 hours. In the last month it has stayed between 56.53 ft and 56.64 ft.

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

Compared with 18 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date: 11.19 ft45.36 ft above the median for this date
Normal for this date: 8.79 ft – 19.68 ft8 years in 10 fall in this range (18 years of records)
Highest on record: 94.87 ftAugust 29, 2017

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.

What happens at each level

117.00 ft: Major lowland flooding continues as homes on Old Houston Road (upstream of the gage) begin to flood.
105.50 ft: Major lowland flooding continues as lowest homes in Riverwalk subdivision along Serpenteer Road begin to flood.
92.00 ft: Major lowland flooding begins in the vicinty of the gage with low point on SH99 inundated.
88.50 ft: Moderate lowland flooding begins. Lowest homes in Summer Hills subdivision along Firefly Lane and Butterfly Lane begin to flood.
83.00 ft: Minor lowland flooding continues as the turnaround under SH99 at Riley Fuzzel Road begins to flood.
81.00 ft: Minor lowland flooding begins in the vicinty of the gage as water escapes the main channel. Bottom of the old gage house and road near the old gage house begin to flood.
56.55 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: 5 %.

Rank	Level	Date
1	94.87 ft	August 29, 2017
2	89.10 ft	May 4, 2024

Weather at the gauge

The forecast is not available right now.

Sunrise 07:28 AM Sunset 06:45 PM Daylight 11 hr, 17 min Waxing gibbous 73%

Map

Other gauges on the W Fk San Jacinto River

Gauge	Level	Compared with normal	24 hours	Distance
W Fk San Jacinto River near HuntsvilleRiver gauge, W Fk San Jacinto River	217.53 ft	Low	−0.05 ft	40 mi
W Fk San Jacinto River below Lake Conroe near ConroeRiver gauge, W Fk San Jacinto River	14.12 ft	Normal	+0.04 ft	18 mi
W Fk San Jacinto River at FM 2854, ConroeRiver gauge, W Fk San Jacinto River	118.44 ft	Very high	±0	16 mi
W Fk San Jacinto River near ConroeRiver gauge, W Fk San Jacinto River	93.67 ft	High	±0	10 mi
W Fk San Jacinto River near HumbleRiver gauge, W Fk San Jacinto River	42.45 ft	Normal	±0	9 mi

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Spring Creek near SpringRiver gauge, Spring Creek	73.16 ft	Very high	±0	6 mi
Crystal Creek at FM 1314 near ConroeRiver gauge, Crystal Creek	98.08 ft	Low	±0	7 mi
Spring Branch at SH 242 near SplendoraRiver gauge, Spring Branch	96.31 ft	Normal	−0.01 ft	8 mi
Panther Br near SpringRiver gauge, Panther Br	8.8 cfs	Normal	+1.5 cfs	8 mi
Caney Creek near SplendoraRiver gauge, Caney Creek	2.79 ft	Normal	±0	8 mi
Cypress Creek near WestfieldRiver gauge, Cypress Creek	64.11 ft	High	−0.08 ft	9 mi
Panther Br at Gosling Rd, The WoodlandsRiver gauge, Panther Br	126.34 ft	Normal	+0.04 ft	9 mi
Bear Br at Research Blvd, The WoodlandsRiver gauge, Bear Br	130.06 ft	Normal	+0.05 ft	10 mi

Questions and answers

What is flood stage for the W Fk San Jacinto River above Lake Houston near Porter?

The official flood stage is 81.00 ft. The level is currently 24.45 ft below it.

What is a normal level for the W Fk San Jacinto River above Lake Houston near Porter in mid-October?

The median for mid-October is 11.19 ft. In 8 years out of 10 the reading falls between 8.79 ft and 19.68 ft, based on 18 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 W Fk San Jacinto River above Lake Houston near Porter today?

On Oct 20, 2026, 08:45 PM CDT, the water level was 56.55 ft. Steady over the last 24 hours.

Is W Fk San Jacinto River above Lake Houston near Porter rising or falling?

Steady over the last 24 hours. Down 0.06 ft over the last 7 days.

Is the level of W Fk San Jacinto River above Lake Houston near Porter normal?

Very high for mid-October. Compared with 18 years of daily readings for this time of year.

What is the highest water level ever recorded at W Fk San Jacinto River above Lake Houston near Porter?

The highest level on record is 94.87 ft on August 29, 2017.

For specialists

Station codes, datum, parameters, data quality and downloads

Operator: U.S. Geological Survey
Station code: usgs:08068090 (Agency page)
Coordinates: 30.14117, -95.33822 (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	56.55 ft	2026-10-21 01:45	Provisional
Flow	42.8 cfs	2026-10-21 01:45	Provisional

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How to cite

U.S. Geological Survey: W Fk San Jacinto River above Lake Houston near Porter (usgs:08068090). Accessed October 21, 2026 via Nivelmap, https://nivelmap.com/en/united-states/texas/w-fk-san-jacinto-river-above-lake-houston-near-porter

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