Station Name: Alton 2SE - Melvin Price L&D
Data Source: USGS

Elevation Above Sea Level: 407 feet

Nearest Address:
Lock and Dam Way
Alton, IL 62002
Madison County

GPS Coordinates: 38.8664, -90.1464

Nearby Water Temperatures

Flood Warning issued April 29 at 11:54AM CDT until May 3 at 1:00AM CDT by NWS St Louis MO

Effective: Wed April 29, 2026, 11:54 AM
Expires: Fri May 1, 2026, 12:00 AM

...The Flood Warning is extended for the following rivers in Illinois...Missouri... Mississippi River at Mel Price LD. Mississippi River at Alton. ...The Flood Warning continues for the following rivers in Illinois...Missouri... Mississippi River at Chester. Mississippi River near Herculaneum. Mississippi River at St. Louis. Mississippi River at Grafton. River forecasts are based on observed precipitation and forecast precipitation for the next 24 hours. * WHAT...Minor flooding is forecast. * WHERE...Mississippi River at Alton. * WHEN...From late tonight to late Saturday night. * IMPACTS...At 21.7 feet, At this level, Highway 94 and the east end of Harbor Point Road off of Missouri Highway 94 north of West Alton begin flooding. Also, the access road the Lincoln Shields recreation area off of U.S. Highway 367 just west of the Clark bridge begins flooding. * ADDITIONAL DETAILS... - At 11:30 AM CDT Wednesday the stage was 20.3 feet. - Forecast...The river is expected to rise above flood stage just after midnight tonight to a crest of 21.5 feet tomorrow evening. It will then fall below flood stage Friday evening. - Flood stage is 21.0 feet.

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. This product, along with additional weather and stream information, is available at https://water.noaa.gov/wfo/lsx

Flood Warning issued April 29 at 11:54AM CDT until May 4 at 8:30PM CDT by NWS St Louis MO

Effective: Wed April 29, 2026, 11:54 AM
Expires: Fri May 1, 2026, 12:00 AM

...The Flood Warning is extended for the following rivers in Illinois...Missouri... Mississippi River at Mel Price LD. Mississippi River at Alton. ...The Flood Warning continues for the following rivers in Illinois...Missouri... Mississippi River at Chester. Mississippi River near Herculaneum. Mississippi River at St. Louis. Mississippi River at Grafton. 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 Mel Price LD. * WHEN...Until Monday evening. * IMPACTS...At 24.0 feet, Alta Villa Road off of Highway 94 north of West Alton is closed within a foot of this height. * ADDITIONAL DETAILS... - At 11:30 AM CDT Wednesday the stage was 22.8 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 11:30 AM CDT Wednesday was 22.8 feet. - Forecast...The river is expected to rise to a crest of 23.9 feet early tomorrow afternoon. It will then fall below flood stage early Sunday afternoon. - Flood stage is 21.0 feet.

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. This product, along with additional weather and stream information, is available at https://water.noaa.gov/wfo/lsx

Flood Warning issued April 29 at 9:38PM CDT until May 4 at 4:00PM CDT by NWS St Louis MO

Effective: Wed April 29, 2026, 9:38 PM
Expires: Fri May 1, 2026, 9:45 AM

...The Flood Warning continues for the following rivers in Illinois...Missouri... Mississippi River near Herculaneum. Mississippi River at Mel Price LD. Mississippi River at Chester. Mississippi River at Grafton. Mississippi River at Alton. Mississippi River at St. Louis. 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 Mel Price LD. * WHEN...Until Monday afternoon. * IMPACTS...At 24.0 feet, Alta Villa Road off of Highway 94 north of West Alton is closed within a foot of this height. * ADDITIONAL DETAILS... - At 9:00 PM CDT Wednesday the stage was 23.4 feet and rising. - Recent Activity...The river rose above flood stage on April 28. - Forecast...The river is expected to rise to a crest of 24.0 feet early tomorrow afternoon. It will then fall below flood stage late Sunday morning. - Flood stage is 21.0 feet.

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. This product, along with additional weather and stream information, is available at https://water.noaa.gov/wfo/lsx

Flood Warning issued April 29 at 9:38PM CDT until May 2 at 10:00PM CDT by NWS St Louis MO

Effective: Wed April 29, 2026, 9:38 PM
Expires: Fri May 1, 2026, 9:45 AM

...The Flood Warning continues for the following rivers in Illinois...Missouri... Mississippi River near Herculaneum. Mississippi River at Mel Price LD. Mississippi River at Chester. Mississippi River at Grafton. Mississippi River at Alton. Mississippi River at St. Louis. River forecasts are based on observed precipitation and forecast precipitation for the next 24 hours. * WHAT...Minor flooding is forecast. * WHERE...Mississippi River at Alton. * WHEN...From late tonight to Saturday evening. * IMPACTS...At 21.7 feet, At this level, Highway 94 and the east end of Harbor Point Road off of Missouri Highway 94 north of West Alton begin flooding. Also, the access road the Lincoln Shields recreation area off of U.S. Highway 367 just west of the Clark bridge begins flooding. * ADDITIONAL DETAILS... - At 9:00 PM CDT Wednesday the stage was 20.8 feet and rising. - Forecast...The river is expected to rise above flood stage just after midnight tonight to a crest of 21.4 feet early tomorrow afternoon. It will then fall below flood stage Friday afternoon. - Flood stage is 21.0 feet.

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. This product, along with additional weather and stream information, is available at https://water.noaa.gov/wfo/lsx

Flood Warning issued April 29 at 11:54AM CDT until May 3 at 1:00PM CDT by NWS St Louis MO

Effective: Wed April 29, 2026, 11:54 AM
Expires: Fri May 1, 2026, 12:00 AM

...The Flood Warning is extended for the following rivers in Illinois...Missouri... Mississippi River at Mel Price LD. Mississippi River at Alton. ...The Flood Warning continues for the following rivers in Illinois...Missouri... Mississippi River at Chester. Mississippi River near Herculaneum. Mississippi River at St. Louis. Mississippi River at Grafton. River forecasts are based on observed precipitation and forecast precipitation for the next 24 hours. * WHAT...Minor flooding is forecast. * WHERE...Mississippi River at St. Louis. * WHEN...From Thursday morning to Sunday afternoon. * IMPACTS...At 30.0 feet, Floodwall at Lacledes Landing is closed. Also at this level, the U.S. Coast Guard may prohibit all recreational vessel traffic from just above the Chain of Rocks Canal south entry to just below the mouth of the Meramec River. * ADDITIONAL DETAILS... - At 11:00 AM CDT Wednesday the stage was 27.6 feet. - Forecast...The river is expected to rise above flood stage late tomorrow morning to a crest of 30.7 feet early Friday morning. It will then fall below flood stage Saturday morning. - Flood stage is 30.0 feet.

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. This product, along with additional weather and stream information, is available at https://water.noaa.gov/wfo/lsx