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 Advisory issued June 1 at 5:57AM CDT until June 1 at 9:00AM CDT by NWS St Louis MO

Effective: Mon June 1, 2026, 5:57 AM
Expires: Mon June 1, 2026, 9:00 AM

* WHAT...Flooding caused by excessive rainfall is expected. * WHERE...Western Madison County in southwestern Illinois... Northern Saint Clair County in southwestern Illinois... Northeastern Saint Louis City in east central Missouri... * WHEN...Until 900 AM CDT. * IMPACTS...Minor flooding in low-lying and poor drainage areas. Water over roadways. Ponding of water in urban or other areas is occurring or is imminent. * ADDITIONAL DETAILS... - At 557 AM CDT, Doppler radar indicated heavy rain due to thunderstorms. Overflowing poor drainage areas will cause minor flooding in the advisory area. Between 1 and 2 inches of rain have fallen, and additional heavy rainfall is expected. - Some locations that will experience flooding include... Belleville, Granite City, O'Fallon, Alton, East St. Louis, Collinsville, Edwardsville, Godfrey, Fairview Heights, Cahokia, Swansea, Glen Carbon, Shiloh, Wood River, Troy, Bethalto, Maryville, Mascoutah and Pontoon Beach.

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

Flash Flood Warning issued June 1 at 4:37AM CDT until June 1 at 9:30AM CDT by NWS St Louis MO

Effective: Mon June 1, 2026, 4:37 AM
Expires: Mon June 1, 2026, 9:30 AM

FFWLSX The National Weather Service in St Louis has issued a * Flash Flood Warning for... Central Calhoun County in southwestern Illinois... Southwestern Greene County in southwestern Illinois... Southwestern Jersey County in southwestern Illinois... Northeastern Lincoln County in east central Missouri... Southeastern Pike County in northeastern Missouri... * Until 930 AM CDT. * At 437 AM CDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 1 and 3 inches of rain have fallen. Additional rainfall amounts of 1 to 2 inches are possible in the warned area. Flash flooding is ongoing or expected to begin shortly. HAZARD...Flash flooding caused by thunderstorms. SOURCE...Radar indicated. IMPACT...Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas. * Some locations that will experience flash flooding include... Elsberry, Hardin, Fieldon, Batchtown, Hamburg, Paynesville, Annada and Nutwood. This includes the following State Parks... Mississippi River State Fish and Wildlife Area and Pere Marquette State Park. This includes the following streams and drainages... Sugar Creek, Otter Creek, Cole Creek, Page Branch, Camp Creek, Macoupin Creek, Michael Creek, Knox Branch, Old Kings Lake Creek, South Fork Otter Creek, Sandy Chute, Shelton Creek, Dry Fork, Ramsey Creek, Mississippi River, South Fork Guinns Creek, Guinns Creek, Illinois River, Possum Creek, Prairie Creek, Little Ramsey Creek and Bryants Creek.

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

Severe Thunderstorm Watch issued June 1 at 6:50AM CDT until June 1 at 9:00AM CDT by NWS St Louis MO

Effective: Mon June 1, 2026, 6:50 AM
Expires: Mon June 1, 2026, 9:00 AM

SEVERE THUNDERSTORM WATCH 260 REMAINS VALID UNTIL 9 AM CDT THIS MORNING FOR THE FOLLOWING AREAS IN ILLINOIS THIS WATCH INCLUDES 5 COUNTIES IN SOUTH CENTRAL ILLINOIS CLINTON WASHINGTON IN SOUTHWEST ILLINOIS MONROE RANDOLPH SAINT CLAIR IN MISSOURI THIS WATCH INCLUDES 7 COUNTIES IN EAST CENTRAL MISSOURI JEFFERSON WASHINGTON IN SOUTHEAST MISSOURI IRON MADISON REYNOLDS SAINT FRANCOIS SAINTE GENEVIEVE THIS INCLUDES THE CITIES OF BELLEVILLE, CAHOKIA, CHESTER, FARMINGTON, AND SPARTA.

Flood Advisory issued June 1 at 6:37AM CDT until June 1 at 10:30AM CDT by NWS St Louis MO

Effective: Mon June 1, 2026, 6:37 AM
Expires: Mon June 1, 2026, 10:30 AM

* WHAT...Flooding caused by excessive rainfall is expected. * WHERE...Saint Clair County in southwestern Illinois... * WHEN...Until 1030 AM CDT. * IMPACTS...Minor flooding in low-lying and poor drainage areas. * ADDITIONAL DETAILS... - At 637 AM CDT, Doppler radar indicated heavy rain due to thunderstorms. Minor flooding is ongoing or expected to begin shortly in the advisory area. Between 1 and 3 inches of rain have fallen. - Additional rainfall amounts up to 1 inch are expected over the area. This additional rain will result in minor flooding. - Some locations that will experience flooding include... Belleville, Cahokia, Swansea, Mascoutah, Freeburg, Dupo, Millstadt, Smithton, New Athens, Marissa, East Carondelet, St. Libory, Lenzburg, Fayetteville and Barr.

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be aware of your surroundings and do not drive on flooded roads.