Weather Warnings
April 20 2026
...The Flood Warning is extended for the following rivers in
Missouri...
Little Osage River near Horton affecting Vernon County.
For the Little Osage River...including Horton...Moderate flooding is
forecast.
* WHAT...Moderate flooding is occurring and moderate flooding is
forecast.
* WHERE...Little Osage River near Horton.
* WHEN...Until late Tuesday morning.
* IMPACTS...At 45.0 feet, moderate flooding occurs at the gage site.
Low lying areas along Route D near Stotesbury flood.
* ADDITIONAL DETAILS...
- At 9:45 PM CDT Sunday the stage was 45.4 feet.
- Bankfull stage is 41.0 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 9:45 PM CDT Sunday was 45.4 feet.
- Forecast...The river is expected to rise to a crest of 45.5
feet just after midnight tonight. It will then fall below
flood stage early Tuesday morning.
- Flood stage is 41.0 feet.
- Flood History...This crest compares to a previous crest of
45.4 feet on 05/11/2009.
- http://www.weather.gov/safety/flood
...The Flood Warning continues for the following rivers in
Illinois...
Illinois River at Hardin.
River forecasts are based on observed precipitation and forecast
precipitation for the next 24 hours.
* WHAT...Minor flooding is occurring and minor flooding is forecast.
* WHERE...Illinois River at Hardin.
* WHEN...Until further notice.
* IMPACTS...At 25.0 feet, Flood Stage. Lowland flooding of
unprotected agricultural land begins.
* ADDITIONAL DETAILS...
- At 8:00 PM CDT Sunday the stage was 25.6 feet.
- Recent Activity...The maximum river stage in the 24 hours ending
at 8:00 PM CDT Sunday was 25.6 feet.
- Forecast...The river is expected to rise to a crest of 26.9 feet
early Wednesday morning.
- Flood stage is 25.0 feet.
...The Flood Warning continues for the following rivers in
Missouri...Illinois...
Mississippi River at Lock & Dam 21.
Mississippi River at Grafton.
Mississippi River at Canton.
Mississippi River at Saverton.
Mississippi River at Winfield.
Mississippi River at Hannibal.
Mississippi River at Clarksville.
Mississippi River at Louisiana.
River forecasts are based on observed precipitation and forecast
precipitation for the next 24 hours.
* WHAT...Minor flooding is occurring and minor flooding is forecast.
* WHERE...Mississippi River at Winfield.
* WHEN...Until further notice.
* IMPACTS...At 28.6 feet, Water begins covering Highway C about a
half mile south of Highway B in St. Charles County.
* ADDITIONAL DETAILS...
- At 7:30 PM CDT Sunday the stage was 27.6 feet.
- Recent Activity...The maximum river stage in the 24 hours ending
at 7:30 PM CDT Sunday was 27.6 feet.
- Forecast...The river is expected to rise to a crest of 28.5 feet
tomorrow evening.
- Flood stage is 26.0 feet.
...The Flood Warning continues for the following rivers in
Missouri...Illinois...
Mississippi River at Lock & Dam 21.
Mississippi River at Grafton.
Mississippi River at Canton.
Mississippi River at Saverton.
Mississippi River at Winfield.
Mississippi River at Hannibal.
Mississippi River at Clarksville.
Mississippi River at Louisiana.
River forecasts are based on observed precipitation and forecast
precipitation for the next 24 hours.
* WHAT...Minor flooding is occurring and minor flooding is forecast.
* WHERE...Mississippi River at Grafton.
* WHEN...Until further notice.
* IMPACTS...At 21.0 feet, Water begins flooding the floor at the
Palisades Marina in Portage Des Sioux. Access to homes along North
Shore Drive in eastern St. Charles County becomes cut off near this
height.
* ADDITIONAL DETAILS...
- At 7:30 PM CDT Sunday the stage was 20.0 feet.
- Recent Activity...The maximum river stage in the 24 hours ending
at 7:30 PM CDT Sunday was 20.0 feet.
- Forecast...The river is expected to rise to a crest of 20.9 feet
early Tuesday afternoon.
- Flood stage is 20.0 feet.
...The Flood Warning continues for the following rivers in
Missouri...Illinois...
Mississippi River at Lock & Dam 21.
Mississippi River at Grafton.
Mississippi River at Canton.
Mississippi River at Saverton.
Mississippi River at Winfield.
Mississippi River at Hannibal.
Mississippi River at Clarksville.
Mississippi River at Louisiana.
River forecasts are based on observed precipitation and forecast
precipitation for the next 24 hours.
* WHAT...Minor flooding is occurring and minor flooding is forecast.
* WHERE...Mississippi River at Lock & Dam 21.
* WHEN...Until Wednesday morning.
* ADDITIONAL DETAILS...
- At 6:00 PM CDT Sunday the stage was 18.3 feet.
- Recent Activity...The maximum river stage in the 24 hours ending
at 6:00 PM CDT Sunday was 18.3 feet.
- Forecast...The river is expected to fall below flood stage early
Tuesday morning and continue falling to 17.3 feet Sunday, April
26.
- Flood stage is 18.0 feet.
...The National Weather Service in St Louis has issued a Flood
Warning for the following rivers in Missouri...Illinois...
Mississippi River at Chester.
River forecasts are based on observed precipitation and forecast
precipitation for the next 24 hours.
* WHAT...Minor flooding is forecast.
* WHERE...Mississippi River at Chester.
* WHEN...From Monday morning to Saturday morning.
* IMPACTS...At 28.0 feet, Unleveed islands near Chester and the
prison farm floods.
* ADDITIONAL DETAILS...
- At 7:30 PM CDT Sunday the stage was 25.8 feet.
- Forecast...The river is expected to rise above flood stage late
tomorrow morning to a crest of 29.2 feet early Wednesday morning.
It will then fall below flood stage early Friday morning.
- Flood stage is 27.0 feet.
...The Flood Warning continues for the following rivers in
Missouri...Illinois...
Mississippi River at Lock & Dam 21.
Mississippi River at Grafton.
Mississippi River at Canton.
Mississippi River at Saverton.
Mississippi River at Winfield.
Mississippi River at Hannibal.
Mississippi River at Clarksville.
Mississippi River at Louisiana.
River forecasts are based on observed precipitation and forecast
precipitation for the next 24 hours.
* WHAT...Minor flooding is occurring and minor flooding is forecast.
* WHERE...Mississippi River at Canton.
* WHEN...Until further notice.
* IMPACTS...At 16.6 feet, Front Street leading to the campground and
Corps park campgrounds flood at this height.
* ADDITIONAL DETAILS...
- At 6:00 PM CDT Sunday the stage was 16.0 feet.
- Recent Activity...The maximum river stage in the 24 hours ending
at 6:00 PM CDT Sunday was 16.0 feet.
- Forecast...The river is expected to fall to 15.4 feet Sunday,
April 26.
- Flood stage is 15.0 feet.
...The Flood Warning continues for the following rivers in
Missouri...Illinois...
Mississippi River at Lock & Dam 21.
Mississippi River at Grafton.
Mississippi River at Canton.
Mississippi River at Saverton.
Mississippi River at Winfield.
Mississippi River at Hannibal.
Mississippi River at Clarksville.
Mississippi River at Louisiana.
River forecasts are based on observed precipitation and forecast
precipitation for the next 24 hours.
* WHAT...Minor flooding is occurring and minor flooding is forecast.
* WHERE...Mississippi River at Hannibal.
* WHEN...Until further notice.
* IMPACTS...At 20.2 feet, Nipper Park begins flooding on the Hannibal
riverfront.
* ADDITIONAL DETAILS...
- At 7:15 PM CDT Sunday the stage was 19.8 feet.
- Recent Activity...The maximum river stage in the 24 hours ending
at 7:15 PM CDT Sunday was 19.8 feet.
- Forecast...The river is expected to fall to 18.1 feet Sunday,
April 26.
- Flood stage is 17.0 feet.
...The Flood Warning continues for the following rivers in
Missouri...Illinois...
Mississippi River at Lock & Dam 21.
Mississippi River at Grafton.
Mississippi River at Canton.
Mississippi River at Saverton.
Mississippi River at Winfield.
Mississippi River at Hannibal.
Mississippi River at Clarksville.
Mississippi River at Louisiana.
River forecasts are based on observed precipitation and forecast
precipitation for the next 24 hours.
* WHAT...Minor flooding is occurring and minor flooding is forecast.
* WHERE...Mississippi River at Saverton.
* WHEN...Until further notice.
* ADDITIONAL DETAILS...
- At 6:00 PM CDT Sunday the stage was 18.3 feet.
- Recent Activity...The maximum river stage in the 24 hours ending
at 6:00 PM CDT Sunday was 18.3 feet.
- Forecast...The river is expected to fall to 16.9 feet Sunday,
April 26.
- Flood stage is 16.0 feet.
...The Flood Warning continues for the following rivers in
Missouri...Illinois...
Mississippi River at Lock & Dam 21.
Mississippi River at Grafton.
Mississippi River at Canton.
Mississippi River at Saverton.
Mississippi River at Winfield.
Mississippi River at Hannibal.
Mississippi River at Clarksville.
Mississippi River at Louisiana.
River forecasts are based on observed precipitation and forecast
precipitation for the next 24 hours.
* WHAT...Minor flooding is occurring and minor flooding is forecast.
* WHERE...Mississippi River at Clarksville.
* WHEN...Until further notice.
* IMPACTS...At 29.0 feet, Water enters the parking lot entrance at
the Clarksville Riverfront Park.
* ADDITIONAL DETAILS...
- At 7:30 PM CDT Sunday the stage was 28.3 feet.
- Recent Activity...The maximum river stage in the 24 hours ending
at 7:30 PM CDT Sunday was 28.3 feet.
- Forecast...The river is expected to rise to a crest of 28.3 feet
just after midnight tonight.
- Flood stage is 25.0 feet.
...The Flood Warning continues for the following rivers in
Missouri...Illinois...
Mississippi River at Lock & Dam 21.
Mississippi River at Grafton.
Mississippi River at Canton.
Mississippi River at Saverton.
Mississippi River at Winfield.
Mississippi River at Hannibal.
Mississippi River at Clarksville.
Mississippi River at Louisiana.
River forecasts are based on observed precipitation and forecast
precipitation for the next 24 hours.
* WHAT...Minor flooding is occurring and minor flooding is forecast.
* WHERE...Mississippi River at Louisiana.
* WHEN...Until further notice.
* IMPACTS...At 17.0 feet, The parking area at the boat house floods.
* ADDITIONAL DETAILS...
- At 7:30 PM CDT Sunday the stage was 18.2 feet.
- Recent Activity...The maximum river stage in the 24 hours ending
at 7:30 PM CDT Sunday was 18.2 feet.
- Forecast...The river is expected to rise to a crest of 18.2 feet
just after midnight tonight.
- Flood stage is 15.0 feet.
...The National Weather Service in St Louis has issued a Flood
Warning for the following rivers in Missouri...
Meramec River near Arnold.
River forecasts are based on observed precipitation and forecast
precipitation for the next 24 hours.
* WHAT...Minor flooding is forecast.
* WHERE...Meramec River near Arnold.
* WHEN...From Monday afternoon to Friday afternoon.
* IMPACTS...At 26.0 feet, Athletic fields east of I-55 begin flooding
near this height.
* ADDITIONAL DETAILS...
- At 7:30 PM CDT Sunday the stage was 22.3 feet.
- Forecast...The river is expected to rise above flood stage
tomorrow afternoon to a crest of 25.7 feet early Wednesday
morning. It will then fall below flood stage Thursday morning.
- Flood stage is 24.0 feet.
...The Flood Warning is extended for the following rivers in
Missouri...
Little Osage River near Horton affecting Vernon County.
Marmaton River near Nevada affecting Vernon County.
Osage River at Taberville affecting St. Clair and Vernon Counties.
For the Little Osage River...including Horton...Moderate flooding is
forecast.
For the Marmaton River...including Nevada...Minor flooding is
forecast.
For the Osage River...including Taberville...Minor flooding is
forecast.
* WHAT...Minor flooding is occurring and minor flooding is forecast.
* WHERE...Osage River at Taberville.
* WHEN...Until Wednesday evening.
* IMPACTS...At 23.3 feet, The handicapped access to the Osage River
launch near Taberville floods.
* ADDITIONAL DETAILS...
- At 6:45 PM CDT Sunday the stage was 23.8 feet.
- Bankfull stage is 23.0 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 6:45 PM CDT Sunday was 23.8 feet.
- Forecast...The river is expected to rise to a crest of 23.8
feet just after midnight tonight. It will then fall below
flood stage early Wednesday afternoon.
- Flood stage is 23.0 feet.
- Flood History...This crest compares to a previous crest of
24.0 feet on 03/18/2019.
- http://www.weather.gov/safety/flood
...The Flood Warning is extended for the following rivers in
Missouri...
Little Osage River near Horton affecting Vernon County.
Marmaton River near Nevada affecting Vernon County.
Osage River at Taberville affecting St. Clair and Vernon Counties.
For the Little Osage River...including Horton...Moderate flooding is
forecast.
For the Marmaton River...including Nevada...Minor flooding is
forecast.
For the Osage River...including Taberville...Minor flooding is
forecast.
* WHAT...Minor flooding is occurring and minor flooding is forecast.
* WHERE...Marmaton River near Nevada.
* WHEN...Until late Wednesday morning.
* IMPACTS...At 24.0 feet, the county road west of the gage, Minnie
Ball Road, is impassable.
* ADDITIONAL DETAILS...
- At 6:45 PM CDT Sunday the stage was 23.8 feet.
- Bankfull stage is 20.0 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 6:45 PM CDT Sunday was 24.0 feet.
- Forecast...The river is expected to rise to a crest of 24.7
feet early tomorrow afternoon. It will then fall below flood
stage early Wednesday morning.
- Flood stage is 20.0 feet.
- Flood History...This crest compares to a previous crest of
24.7 feet on 05/26/2015.
- http://www.weather.gov/safety/flood
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