Meramec River at Fenton, MO
River level and flood forecast · St. Louis County
Normal2.1 ftas of Mon 3:15 PM
The river is 20.9 ft below flood stage (23 ft).
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 | 32 ft |
| Moderate flood stage | 29 ft |
| Flood stage | 23 ft |
| Action stage | 21 ft |
| Record crest (December 31, 2015) | 42.86 ft |
What floods at each level
From the National Weather Service, highest first.
- 43.6 ftThe house at the corner of Main and Ferry begins flooding near this height.
- 43.3 ftThe Sisters Teahouse on Main Street begins flooding near this height.
- 42.8 ftDenny Dennis Sporting Goods begins flooding at this height.
- 42.7 ftWater reaches the front door of the American Legion Hall.
- 41.4 ftThe levee protecting the MSD sewage plant is overtopped.
- 39.4 ftThe lower storage level of the American Legion Hall begins flooding.
- 37.7 ftOpps Lane residence downstream of gage begins flooding.
- 36.8 ftOpps Lane and Tosti's Transmission on Gravois Road begin flooding at this height.
- 34.5 ftAn auto glass shop on Gravois begins flooding near this height.
- 32.7 ftJoe Clark's Restaurant begins flooding at this height.
- 32.5 ftWhite building on Gravois across from Joe Clark's begins flooding at this height.
- 32 ftBrannan's Marine and Motorsports begin flooding at this height.
- 30.8 ftOld 141 begins flooding east of the Gravois intersection.
- 30.7 ftHeating and cooling store begins flooding at this height.
- 30.5 ftGravois Road begins flooding in Fenton southwest of the new bridge.
- 29.5 ftThe Fenton Feed Mill begins flooding near this height.
- 25.4 ftWater begins backing onto Water Street at the riverside drain at the Ferry Street intersection.
- 25.3 ftRestrooms and playground at Minnie Ha Ha Park and the gazebo at Fenton Park begin flooding near this height.
- 25.2 ftMinnie Ha Ha Park gazebo begins flooding.
- 22.9 ftAt this height, the entire boat ramp path at Minnie Ha Ha Park will be submerged.
- 22.6 ftThe pedestrian walkway along the Meramec Greenway begins flooding near this height about halfway between the Highway 30 bridge and the Greenway gazebo.
- 22.2 ftPedestrain trail along Opps Lane begins flooding near the MSD treatment plant.
- 19.9 ftNear this height, the top of the boat ramp at Minnie Ha Ha Park will be submerged.
Highest crests on record
- 42.86 ft — December 31, 2015
- 41.88 ft — May 3, 2017
- 32.56 ft — June 9, 2019
- 29.37 ft — May 5, 2019
- 29.24 ft — November 9, 2024
Recent crests: 21.69 ft (March 9, 2026) · 27.25 ft (April 8, 2025) · 29.24 ft (November 9, 2024) · 24.23 ft (March 28, 2023) · 23.9 ft (May 9, 2022)
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (FNNM7); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.