Illinois River at Meredosia, IL
River level and flood forecast · Morgan County
Normal8.8 ftas of Mon 3 PM
The river is 8.2 ft below flood stage (17 ft).
Forecast to fall to 5.8 ft by Mon, Oct 19, 7 AM.
The last 7 days and the forecast
NWS forecast issued Mon, Oct 12, 9:40 AM. Forecasts change as rain falls and as upstream water arrives.
Flood stages
| Major flood stage | 24 ft |
| Moderate flood stage | 22 ft |
| Flood stage | 17 ft |
| Action stage | 14 ft |
| Record crest (July 2, 2015) | 28.86 ft |
What floods at each level
From the National Weather Service, highest first.
- 38 ftCoon Run Levee is overtopped.
- 33.5 ftMcGee Creek Levee is overtopped.
- 32 ftMauvaise Terre Levee is overtopped.
- 31 ftMeredoisa Lake Levee is overtopped.
- 29.8 ftBurlington Northern Railroad tracks and Levee at route 104 overtop.
- 28 ftScott County and Northern Meredoisa Levees are overtopped and flood fighting activities begin at Willow Creek Lake and Dam.
- 27 ftFlood fighting begins at Scott County... Coon Run... and Meredosia Lakes and Dams.
- 26.4 ftFlood Fighting begins at Valley City Lake and Dam and floodwaters overtop Little Creek Levee.
- 26 ftDamage begins to buildings in Meredosia. Also, the U.S. Coast Guard will consider closing the Illinois River between the LaGrange Lock and Dam and Montezuma.
- 25.7 ftCemetary Road begins flooding west of Old Naples Road.
- 25.4 ftFlood Fighting begins at Little Creek Lake and Dam.
- 25 ftSmith Lake Road is flooded south of Meredosia.
- 24.7 ftCounty Roads 1625E and 1675E begin to flood northwest of Meredosia.
- 24 ftKochs Lane east of Shady Acres begins flooding.
- 23 ftFlood fighting activities begin at Big Swan Lake and Dam.
- 22.4 ftMeredosia Lake Road overtopped.
- 22.2 ftLow roads in Florence overtopped.
- 22 ftCargill Company in Florence begins flood fighting activities. Also, unloading operations are shut down at the Ameren power plant.
- 21 ftChambers Road south of Naples floods at Mauvaise Terre Creek near this level.
- 20 ftBeach Road just north of Shady Acres floods near this height.
- 18 ftCity of Meredosia plugs storm sewer outlets.
- 17.39 ftMeredosia boat dock floods.
- 13 ftSunset Beach Road begins flooding about two miles north of Meredosia near this level.
- 1 ftAt and below this height, barge traffic will need to consider lowering tonnage to avoid grounding.
Highest crests on record
- 28.86 ft — July 2, 2015
- 28.7 ft — May 26, 1943
- 28.69 ft — April 27, 2013
- 28.39 ft — June 4, 2019
- 28.3 ft — May 30, 1995
Recent crests: 18.7 ft (May 6, 2024) · 17.96 ft (February 6, 2024) · 17.61 ft (April 14, 2022) · 17.98 ft (July 17, 2021) · 25.39 ft (May 27, 2020)
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (MROI2); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.