San Bernard River near Old Ocean, TX
River level and flood forecast · Brazoria County
Normal1.9 ftas of Mon 2:45 PM
The river is 5.1 ft below flood stage (7 ft).
Flow: 67 cubic feet per second (USGS).
The last 7 days and the forecast
NWS forecast issued Sun, Dec 31, 6 PM. Forecasts change as rain falls and as upstream water arrives.
Flood stages
| Major flood stage | 16 ft |
| Moderate flood stage | 11 ft |
| Flood stage | 7 ft |
| Action stage | 5 ft |
| Record crest (September 2, 2017) | 30.16 ft |
What floods at each level
From the National Weather Service, highest first.
- 25.5 ftFM 521 begins to flood.
- 25 ftLowest homes along CR 747A begin to flood. Reifels Feed Store is threatened. Graham Road and Kaufman Road become threatened.
- 24 ftLow spots on HWY 35 become threatened. Low spots on Cypress Crest Street begin to take on water.
- 23 ftFM 522 West and CR 747A become threatened.
- 22 ftFM 522 East and Gupton Road become threatened.
- 21 ftAllhands Drive becomes threatened.
- 20.5 ftLowest homes along CR 244A being to flood.
- 20 ftWindsor Road, CR 797 and Post Oak Court become threatened.
- 19.5 ftLowest homes along CR 506 north of FM 521 begin to flood. CR 244A becomes threatened.
- 19 ftHomes along CR 506 north of FM 521 are threatened. River Drive, Riverbend Road, and CR 945 become threatened.
- 18 ftWater is over the road at the entrance of the Phillips Terminal. Water is over the top of the dock at the Phillips Terminal near Sweeny with all vessel traffic stopped. Widespread inundation of the left floodplain occurs. Hook Road becomes threatened.
- 17 ftLow spots on CR 506 begin to flood.
- 16 ftWater begins inundating the boat ramp off of FM 521. Pan American Road and Riverglen Street become threatened.
- 13 ftWater is within 5 feet of the top of the dock at the Phillips Terminal near Sweeny. Tugs can not push barges upstream and are unable to dock and there is widespread inundation of the floodplain.
- 11 ftLazy G RV Park becomes threatened.
- 10 ftWater begins spilling into the left floodplain. Water is over the mid level walkway at the Phillips Terminal near Sweeny.
- 9 ftWater is over the mid level walkway at the Phillips Terminal near Sweeny.
- 7.5 ftLazy G RV Boat Ramp takes on water.
- 7 ftWater is over the lowest platform at the Phillips Terminal near Sweeny. Hanson Park begins to flood.
- 5 ftPrivate boat ramps begin taking on water.
Highest crests on record
- 30.16 ft — September 2, 2017
- 20.35 ft — June 7, 2019
- 15.82 ft — May 12, 2019
- 15.36 ft — July 11, 2021
- 12.72 ft — July 29, 2024
Recent crests: 12.72 ft (July 29, 2024) · 10.1 ft (July 8, 2024) · 15.36 ft (July 11, 2021) · 11.3 ft (June 5, 2021) · 9.78 ft (January 4, 2021)
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (OCNT2); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.