Active Weather Alerts
Flash Flood Warning
Issued: 1:19 AM Aug. 22, 2026 – National Weather Service
The National Weather Service in Chicago has issued a * Flash Flood Warning for... West Central La Salle County in north central Illinois... * Until midnight CDT. * At 819 PM CDT, Doppler radar indicated thunderstorms with rain rates up to 3 inches per hour southeast of Granville. Up to 2.5 inches of rain have fallen. Flash flooding is expected at the onset of rainfall. HAZARD...Flash flooding caused by thunderstorms. SOURCE...Radar and automated gauges. IMPACT...Rapid-onset flooding of creeks, streams, drainage ditches, streets, underpasses, low-lying areas, and other poor drainage areas. * Some locations that will experience flash flooding include... Tonica and Lostant. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Warning means rapid-onset flooding is imminent or may already be occurring. Persons along creeks, drainage ditches, and other waterways should take immediate precautions to protect life and property. Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. && FLASH FLOOD...RADAR AND GAUGE INDICATED; EXPECTED RAINFALL RATE...3 INCHES IN 1 HOUR
Flood Advisory
Issued: 12:58 AM Aug. 22, 2026 – National Weather Service
...FLOOD ADVISORY IN EFFECT UNTIL MIDNIGHT CDT TONIGHT... * WHAT...Flooding caused by excessive rainfall is expected. * WHERE...Southwestern La Salle County in north central Illinois... * WHEN...Until midnight CDT tonight. * IMPACTS...Flooding may occur in poor drainage areas. Roads and streets may be flooded. * ADDITIONAL DETAILS... - At 756 PM CDT, Doppler radar indicated thunderstorms with rate rates up to 2 inches per hour near the town Granville. Minor flooding may begin shortly after the onset of heavy rainfall in the advisory area. - Some locations that will experience flooding include... Tonica, Lostant, Rutland, Cedar Point, Dana and Leonore. - http://www.weather.gov/safety/flood PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flood Advisory means minor flooding along waterways and other poor drainage areas is imminent or may already be occurring. Persons in the advisory area should use caution and avoid flood waters. Be especially cautious at night when it is harder to recognize the dangers of flooding. &&
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