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West Fork San Jacinto River near Porter, TX

River level and flood forecast · Montgomery County

Normal56.7 ftas of Mon 2:45 PM

The river is 24.3 ft below flood stage (81 ft).

Flow: 58 cubic feet per second (USGS).

The last 7 days and the forecast

5060708090100TueWedThuFriSatSunMonAction 73 ftFlood 81 ftModerate 88.5 ftMajor 92 ftNowObserved (ft)NWS forecast

NWS forecast issued Fri, Oct 2, 8:03 AM. Forecasts change as rain falls and as upstream water arrives.

Flood stages

Major flood stage92 ft
Moderate flood stage88.5 ft
Flood stage81 ft
Action stage73 ft
Record crest (August 29, 2017)94.87 ft

What floods at each level

From the National Weather Service, highest first.

  • 117 ftMajor lowland flooding continues as homes on Old Houston Road (upstream of the gage) begin to flood.
  • 105.5 ftMajor lowland flooding continues as lowest homes in Riverwalk subdivision along Serpenteer Road begin to flood.
  • 92 ftMajor lowland flooding begins in the vicinty of the gage with low point on SH99 inundated.
  • 88.5 ftModerate lowland flooding begins. Lowest homes in Summer Hills subdivision along Firefly Lane and Butterfly Lane begin to flood.
  • 83 ftMinor lowland flooding continues as the turnaround under SH99 at Riley Fuzzel Road begins to flood.
  • 81 ftMinor 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.

Highest crests on record

  1. 94.87 ft — August 29, 2017
  2. 89.1 ft — May 4, 2024

Recent crests: 89.1 ft (May 4, 2024) · 94.87 ft (August 29, 2017)

Up and down the river, and nearby

See it on the live map →Radar & warnings for Montgomery CountyNWS gauge pageUSGS gauge 08068090

Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (POET2); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.