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 16 at 11:54AM CDT by NWS St Louis MO

Effective: Thu April 16, 2026, 11:54 AM
Expires: Sat April 18, 2026, 12:00 AM

...The National Weather Service in St Louis has issued a Flood Warning 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 forecast. * WHERE...Illinois River at Hardin. * WHEN...From Friday afternoon until further notice. * IMPACTS...At 25.0 feet, Flood Stage. Lowland flooding of unprotected agricultural land begins. * ADDITIONAL DETAILS... - At 11:30 AM CDT Thursday the stage was 24.7 feet. - Forecast...The river is expected to rise above flood stage early tomorrow afternoon and continue rising to 25.2 feet early Wednesday morning. Additional rises are possible thereafter. - Flood stage is 25.0 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 15 at 9:36PM CDT by NWS St Louis MO

Effective: Wed April 15, 2026, 9:36 PM
Expires: Fri April 17, 2026, 9:45 AM

...The Flood Warning is extended for the Mississippi River at the following locations... 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 27.5 feet, At this stage, Lock and Dam 25 will stockpile 200 tons of sand, 12,000 sandbags, and 10,000 square feet of polyethylene plastic as a precaution. * ADDITIONAL DETAILS... - At 9:00 PM CDT Wednesday the stage was 26.4 feet. - Forecast...The river is expected to rise to 27.3 feet Wednesday, April 22. Additional rises are possible thereafter. - Flood stage is 26.0 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 15 at 9:36PM CDT by NWS St Louis MO

Effective: Wed April 15, 2026, 9:36 PM
Expires: Fri April 17, 2026, 9:45 AM

...The Flood Warning is extended for the Mississippi River at the following locations... 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 27.2 feet, Silo Park just northwest of Clarksville off Highway 79 begins flooding. * ADDITIONAL DETAILS... - At 9:00 PM CDT Wednesday the stage was 26.6 feet. - Forecast...The river is expected to rise to 27.1 feet Sunday morning. Additional rises are possible thereafter. - 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 16 at 11:54AM CDT by NWS St Louis MO

Effective: Thu April 16, 2026, 11:54 AM
Expires: Sat April 18, 2026, 12:00 AM

...The Flood Warning continues for the following rivers in Missouri...Illinois... 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 27.5 feet, At this stage, Lock and Dam 25 will stockpile 200 tons of sand, 12,000 sandbags, and 10,000 square feet of polyethylene plastic as a precaution. * ADDITIONAL DETAILS... - At 11:30 AM CDT Thursday the stage was 26.5 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 11:30 AM CDT Thursday was 26.5 feet. - Forecast...The river is expected to rise to 27.4 feet Wednesday evening. Additional rises are possible thereafter. - Flood stage is 26.0 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 16 at 11:54AM CDT by NWS St Louis MO

Effective: Thu April 16, 2026, 11:54 AM
Expires: Sat April 18, 2026, 12:00 AM

...The Flood Warning continues for the following rivers in Missouri...Illinois... 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 27.2 feet, Silo Park just northwest of Clarksville off Highway 79 begins flooding. * ADDITIONAL DETAILS... - At 11:30 AM CDT Thursday the stage was 26.6 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 11:30 AM CDT Thursday was 26.7 feet. - Forecast...The river is expected to rise to a crest of 26.6 feet this afternoon. It will then rise to 27.4 feet Wednesday evening. Additional rises are possible thereafter. - 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