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 27 at 3:11PM CDT by NWS St Louis MO

Effective: Mon April 27, 2026, 3:11 PM
Expires: Wed April 29, 2026, 3:15 AM

...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. * ADDITIONAL DETAILS... - At 3:00 PM CDT Monday the stage was 26.5 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 3:00 PM CDT Monday was 26.5 feet. - Forecast...The river is expected to rise to a crest of 27.0 feet early Friday morning. - Flood stage is 25.0 feet.

Motorists should not attempt to drive around barricades or drive cars through flooded areas. Rainfall heavier than forecast could cause river levels to rise even higher than predicted. The National Weather Service will monitor this developing situation and issue follow up statements as conditions change. This product, along with additional weather and stream information, is available at https://water.noaa.gov/wfo/lsx

Flood Warning issued April 27 at 1:35PM CDT until May 5 at 1:00AM CDT by NWS St Louis MO

Effective: Mon April 27, 2026, 1:35 PM
Expires: Wed April 29, 2026, 1:45 AM

...The Flood Warning is extended for the following rivers in Illinois...Missouri... Mississippi River at Grafton. Mississippi River at Canton. Mississippi River at Saverton. ...The Flood Warning continues for the following rivers in Illinois...Missouri... Mississippi River at Winfield. Mississippi River at Clarksville. Mississippi River at Hannibal. 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 Tuesday, May 05. * IMPACTS...At 21.5 feet, In Portage des Sioux, MO, Le Sieur Street leading to the Marina and to Our Lady of the River Statue is flooded. * ADDITIONAL DETAILS... - At 1:00 PM CDT Monday the stage was 20.5 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 1:00 PM CDT Monday was 20.5 feet. - Forecast...The river is expected to rise to a crest of 21.5 feet Thursday evening. It will then fall below flood stage Sunday evening. - Flood stage is 20.0 feet.

Motorists should not attempt to drive around barricades or drive cars through flooded areas. Rainfall heavier than forecast could cause river levels to rise even higher than predicted. The National Weather Service will monitor this developing situation and issue follow up statements as conditions change. This product, along with additional weather and stream information, is available at https://water.noaa.gov/wfo/lsx

Flood Warning issued April 27 at 10:41PM CDT until May 5 at 10:00AM CDT by NWS St Louis MO

Effective: Mon April 27, 2026, 10:41 PM
Expires: Wed April 29, 2026, 10:45 AM

...The Flood Warning is extended for the following rivers in Illinois...Missouri... Illinois River at Valley City. Mississippi River at Grafton. Mississippi River at Saverton. Mississippi River at Chester. Meramec River near Arnold. ...The Flood Warning continues for the following rivers in Illinois...Missouri... Mississippi River at Canton. Mississippi River at Clarksville. Mississippi River at Louisiana. Kaskaskia River at Vandalia. Missouri River near Chamois. Missouri River at Hermann. Mississippi River at Lock & Dam 21. Illinois River at Hardin. Mississippi River at Winfield. Mississippi River at Hannibal. Mississippi River at Quincy. 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 Tuesday, May 05. * IMPACTS...At 22.5 feet, East end of Main Street in Portage des Sioux begins flooding near this height. * ADDITIONAL DETAILS... - At 10:30 PM CDT Monday the stage was 21.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 10:30 PM CDT Monday was 21.0 feet. - Forecast...The river is expected to rise to a crest of 22.4 feet early Thursday morning. It will then fall below flood stage Monday, May 04. - Flood stage is 20.0 feet.

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Motorists should not attempt to drive around barricades or drive cars through flooded areas. Rainfall heavier than forecast could cause river levels to rise even higher than predicted. The National Weather Service will monitor this developing situation and issue follow up statements as conditions change. This product, along with additional weather and stream information, is available at https://water.noaa.gov/wfo/lsx

Flood Warning issued April 27 at 10:41PM CDT by NWS St Louis MO

Effective: Mon April 27, 2026, 10:41 PM
Expires: Wed April 29, 2026, 10:45 AM

...The Flood Warning is extended for the following rivers in Illinois...Missouri... Illinois River at Valley City. Mississippi River at Grafton. Mississippi River at Saverton. Mississippi River at Chester. Meramec River near Arnold. ...The Flood Warning continues for the following rivers in Illinois...Missouri... Mississippi River at Canton. Mississippi River at Clarksville. Mississippi River at Louisiana. Kaskaskia River at Vandalia. Missouri River near Chamois. Missouri River at Hermann. Mississippi River at Lock & Dam 21. Illinois River at Hardin. Mississippi River at Winfield. Mississippi River at Hannibal. Mississippi River at Quincy. 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. * ADDITIONAL DETAILS... - At 10:30 PM CDT Monday the stage was 26.9 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 10:30 PM CDT Monday was 26.9 feet. - Forecast...The river is expected to rise to a crest of 27.4 feet early Friday morning. - Flood stage is 25.0 feet.

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Motorists should not attempt to drive around barricades or drive cars through flooded areas. Rainfall heavier than forecast could cause river levels to rise even higher than predicted. The National Weather Service will monitor this developing situation and issue follow up statements as conditions change. This product, along with additional weather and stream information, is available at https://water.noaa.gov/wfo/lsx

Flood Warning issued April 27 at 2:54PM CDT by NWS St Louis MO

Effective: Mon April 27, 2026, 2:54 PM
Expires: Wed April 29, 2026, 3:00 AM

...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 Wednesday afternoon until further notice. * IMPACTS...At 27.0 feet, Meramec Bottom Road between Wells Road and Kerth Road begins flooding near this height. * ADDITIONAL DETAILS... - At 2:30 PM CDT Monday the stage was 20.5 feet. - Forecast...The river is expected to rise above flood stage Wednesday afternoon and continue rising to a crest of 28.7 feet early Friday afternoon. - Flood stage is 24.0 feet.

Motorists should not attempt to drive around barricades or drive cars through flooded areas. Rainfall heavier than forecast could cause river levels to rise even higher than predicted. The National Weather Service will monitor this developing situation and issue follow up statements as conditions change. This product, along with additional weather and stream information, is available at https://water.noaa.gov/wfo/lsx