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 Watch issued June 8 at 1:41AM CDT until June 9 at 1:00AM CDT by NWS St Louis MO

Effective: Mon June 8, 2026, 1:41 AM
Expires: Mon June 8, 2026, 4:45 PM

* WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of Illinois, including the following areas, Bond IL, Brown IL, Calhoun IL, Clinton IL, Fayette IL, Greene IL, Jersey IL, Macoupin IL, Madison IL, Marion IL, Monroe IL, Montgomery IL, Pike IL, Saint Clair IL and Washington IL and Missouri, including the following areas, Franklin MO, Gasconade MO, Jefferson MO, Lincoln MO, Montgomery MO, Pike MO, Saint Charles MO, Saint Louis City MO, Saint Louis MO and Warren MO. * WHEN...From 7 AM CDT this morning through late tonight. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - Slow moving thunderstorms will be capable of locally heavy rainfall.

You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.

Flood Watch issued June 8 at 12:54PM CDT until June 9 at 7:00AM CDT by NWS St Louis MO

Effective: Mon June 8, 2026, 12:54 PM
Expires: Tue June 9, 2026, 4:00 AM

* WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of Illinois, including the following areas, Bond IL, Brown IL, Calhoun IL, Clinton IL, Fayette IL, Greene IL, Jersey IL, Macoupin IL, Madison IL, Marion IL, Monroe IL, Montgomery IL, Pike IL, Saint Clair IL and Washington IL and Missouri, including the following areas, Franklin MO, Gasconade MO, Jefferson MO, Lincoln MO, Montgomery MO, Pike MO, Saint Charles MO, Saint Louis City MO, Saint Louis MO and Warren MO. * WHEN...Through Tuesday morning. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - Additional showers and thunderstorms with locally heavy rainfall will be possible, which could lead to flash flooding, especially if they occur over saturated soils.

You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.

Heat Advisory issued June 8 at 11:44AM CDT until June 9 at 10:00PM CDT by NWS St Louis MO

Effective: Mon June 8, 2026, 11:44 AM
Expires: Tue June 9, 2026, 2:45 AM

* WHAT...Heat index values up to 108 expected. * WHERE...Portions of southwest Illinois and central, east central, and southeast Missouri. * WHEN...From noon to 10 PM CDT Tuesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.

Flood Warning issued June 8 at 11:27AM CDT until June 12 at 12:00AM CDT by NWS St Louis MO

Effective: Mon June 8, 2026, 11:27 AM
Expires: Tue June 9, 2026, 11:30 PM

...The National Weather Service in St Louis has issued a Flood Warning for the following rivers in Missouri... Missouri River at Washington. Missouri River at St. Charles. River forecasts are based on observed precipitation and forecast precipitation for the next 24 hours. * WHAT...Minor flooding is forecast. * WHERE...Missouri River at St. Charles. * WHEN...From late tonight to late Thursday night. * IMPACTS...At 27.0 feet, The Katy Trail begins flooding near this height along Hawning Road, about 2 miles north northeast of the Highway 370 bridge. * ADDITIONAL DETAILS... - At 11:00 AM CDT Monday the stage was 19.6 feet. - Forecast...The river is expected to rise above flood stage late tonight to a crest of 26.6 feet tomorrow evening. It will then fall below flood stage Wednesday evening. - Flood stage is 25.0 feet.

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. 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