West Fork San Jacinto River near Conroe, TX

River level and flood forecast · Montgomery County

Normal93.7 ftas of Mon 2:15 PM

The river is 22.1 ft below flood stage (115.8 ft).

Flow: 29 cubic feet per second (USGS).

The last 7 days and the forecast

90100110120TueWedThuFriSatSunMonAction 114.8 ftFlood 115.8 ftModerate 116.8 ftMajor 117.8 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 stage117.8 ft
Moderate flood stage116.8 ft
Flood stage115.8 ft
Action stage114.8 ft
Record crest (August 29, 2017)126.93 ft

What floods at each level

From the National Weather Service, highest first.

  • 126.93 ftFlood of Record set on 8/29/2017 during Harvey
  • 126.09 ftPrevious flood of record on October 18, 1994.
  • 117.8 ftMajor lowland flooding begins.
  • 116.8 ftModerate lowland flooding begins.
  • 115.8 ftMinor lowland flooding begins.

Highest crests on record

  1. 126.93 ft — August 29, 2017
  2. 126.1 ft — October 18, 1994
  3. 123.22 ft — June 3, 1950
  4. 123.15 ft — August 30, 1945
  5. 123 ft — April 22, 1926

Recent crests: 121.82 ft (May 3, 2024) · 126.93 ft (August 29, 2017) · 121.14 ft (May 28, 2016) · 116.51 ft (May 28, 2015) · 116.05 ft (May 13, 2015)

Up and down the river, and nearby

Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (CFKT2); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.