Meramec River near Eureka, MO
River level and flood forecast · St. Louis County
Normal2.6 ftas of Mon 2:30 PM
The river is 16.4 ft below flood stage (19 ft).
Flow: 456 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 | 31 ft |
| Moderate flood stage | 26 ft |
| Flood stage | 19 ft |
| Action stage | 17 ft |
| Record crest (May 3, 2017) | 46.11 ft |
What floods at each level
From the National Weather Service, highest first.
- 46.5 ftThe Raineri Construction Products building on Truitt Drive begins flooding near this height.
- 46.3 ftThe Shell station between south Central Avenue and Highway 109 building and the Eureka Post Office building will both begin flooding near this height.
- 46 ftMidwest Motors dealership's office building begins flooding at this height.
- 45.7 ftGershenson Construction on Truitt Drive begins flooding at this height.
- 45.3 ftThe Legion Park Community Center will begin flooding near this height.
- 45 ftThree businesses along Truitt Drive, Earthbound Recycling Center, J.M. Mersheutz Construction, and Sellenriek Grading, begin flooding near this height.
- 44.5 ftThe intersection of Highway 109 with highways W and FF will begin flooding near this height.
- 44 ftCotton's Ace Hardware between South Central Avenue and Highway 109 begins flooding near this height.
- 43.5 ftNear this height, floodwaters will reach the top of the rim around the wastewater treatment plant lagoon.
- 43 ftNear this height, numerous businesses along Central Avenue in old town Eureka, Rockwood Bank, and the sewage treatment plant will begin flooding.
- 42.8 ftMissouri State Route 109 in the older business section of Eureka is closed near this height.
- 42 ftMissouri State Route 109 near Old State Road is flooded and closed near this height. Also, Lions Park ball fields will begin flooding near this height.
- 41.5 ftNear this height, floodwaters will reach the floors of the utility buildings at the wastewater treatment plant, including the generator shelter.
- 40.2 ftHighway 109 at Eureka Senior High School is closed.
- 40 ftThe right bank begins to overflow.
- 35 ftLighthouse Storage property begins to flood. Shelters and roads within Route 66 State Park are also flooded at this level.
- 34 ftNumerous homes on West Spring River Ranch Road begin flooding at or slightly above this level.
- 32.9 ftNear this height, the parking lot, restrooms, and smaller pavilion along Williams Road at Kircher Park in Eureka begin flooding.
- 32.5 ftAt this height, about 12 houses on Willman Road start flooding the main floors. On the river's north side, another 8 homes along West Spring River Ranch Road begin flooding.
- 29.7 ftNear this height, the large pavilion floor and gazebo along Williams Road at Kircher Park in Eureka begin flooding.
- 28 ftThe lowest house on West Spring River Ranch Road begins flooding on the lower level. Also, at least one home on Willman Road begins flooding near this height.
- 27 ftThe Route 66 State Park road to the equestrian trailhead and to the boat ramp is flooded.
- 25.5 ftHornecker Road is closed near this height.
- 24.5 ftThe athletic fields at Eureka Senior High School begin flooding near this height.
- 23.8 ftSpring River Ranch Road begins flooding near this height on the east end.
Highest crests on record
- 46.11 ft — May 3, 2017
- 46.06 ft — December 30, 2015
- 42.89 ft — December 6, 1982
- 40.9 ft — April 14, 1994
- 40.06 ft — March 22, 2008
Recent crests: 23.6 ft (March 8, 2026) · 21.92 ft (April 22, 2025) · 32.45 ft (April 8, 2025) · 35.39 ft (November 8, 2024) · 21.45 ft (August 6, 2023)
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (ERKM7); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.