Meramec River near Pacific

1. 33.80 ftNear this height, the Husky Corporation and the Pro Roller Company along Industrial Drive at Denton Road begin flooding.
2. 33.50 ftThe BNSF RR tracks act as a levee protecting the eastern two-thirds of Pacific. Near this height, these tracks may be overtopped.
3. 32.80 ftNear this height, Interstate 44 may close in both directions east of mile marker 254.0. This occurred during the December 2015 flood.
4. 32.70 ftBackwater from Calvey Creek will force the closure of Missouri State Route O east of Robertsville near this height.
5. 31.00 ftRailroad tracks begin to flood. This did not happen in 2015 as water
6. 29.70 ftThe clubhouse at the St. Louis Skeet and Trap Club begins to flood.
7. 29.50 ftNear this height, the Graphic Packaging International Company begins flooding at Denton Road and Jefferson Street.
8. 28.90 ftThe Olympic Shooting Facility at the St. Louis Skeet and Trap Club is flooded.
9. 27.50 ftEast Osage Street (Route 66) is closed.
10. 27.20 ftMissouri State Route O west of Robertsville State Park begins flooding near this level.
11. 27.00 ft20 to 30 residences become subject to flooding. Major flooding begins.
12. 25.50 ftDenton Road from the Industrial Park south is closed.
13. 25.00 ftEast Congress between Columbus and Olive are flooded in City of Pacific.
14. 24.40 ftHighway F & O at Brush Creek is flooded and closed.
15. 23.50 ftWater begins flooding the grounds at the St. Louis Skeet and Trap Club east of Pacific.
16. 23.00 ftThe lift station property at East Congress and Elm Street begins flooding near this height.
17. 22.60 ftFour houses near the gage begin to flood at this stage.
18. 22.00 ftJefferson Street extension is flooded and closed.
19. 18.60 ftHorneker Road begins to flood near this height.
20. 18.00 ftThe left bank begins to overflow.
21. 17.50 ftPrivate road under the Highway F bridge begins flooding near this height.
22. 17.00 ftState Highway AK begins flooding near the intersection with State Highway O near this height.
23. 16.50 ftOpeechee Beach Road is flooded and closed.
24. 16.20 ftOpeechee Beach Road begins flooding.
25. 16.00 ftRoute N begins to flood.

Chance of flooding, September to November

The three-month chances are the River Forecast Centers’ long-range flood outlook, issued August 28, 2026.

Most recent crests

• March 10, 2026: 15.09 ft
• March 8, 2026: 15.77 ft
• April 22, 2025: 16.49 ft
• April 8, 2025: 23.03 ft
• November 8, 2024: 26.40 ft
• March 27, 2023: 20.25 ft
• March 6, 2023: 17.08 ft
• January 14, 2020: 19.97 ft
• March 30, 2018: 15.42 ft
• February 27, 2018: 18.82 ft

• UpstreamMeramec River at Sullivan
• DownstreamMeramec River at Eureka
• Big River at Byrnesville
• Bourbeuse River at Union
• Meramec River at Valley Park
• Missouri River at Washington
• Meramec River at Fenton
• Dardenne Creek at O'Fallon
• Meramec River at Arnold

Forecasts by the North Central River Forecast Center. Forecasts are issued as needed during times of high water, but are not routinely available. River forecasts for this location take into account past precipitation and the precipitation amounts expected approximately 24 hours into the future from the forecast issuance time. River forecasts for this location take into account past precipitation and the precipitation amounts expected approximately 48 hours into the future from the forecast issuance time.

Stage, flood stages, impacts and crest history from NOAA’s National Water Prediction Service. Streamflow and the daily record from the U.S. Geological Survey.