Flood Advisory — Jefferson County, Illinois
Minor flooding is expected — not severe enough for a warning, but potentially inconvenient or hazardous for travel.
Current Status
🌊 Active: Flood Advisory
Flood Advisory issued August 12 at 6:12PM CDT until August 12 at 9:15PM CDT by NWS Paducah KY
* WHAT...Urban area and small stream flooding caused by excessive rainfall is expected. * WHERE...Northern Franklin County in south central Illinois... Hamilton County in south central Illinois... Southern Jefferson County in south central Illinois... * WHEN...Until 915 PM CDT. * IMPACTS...Minor flooding in low-lying and poor drainage areas. * ADDITIONAL DETAILS... - At 612 PM CDT, Doppler radar indicated heavy rain due to thunderstorms. This will cause urban and small stream flooding. Between 1 and 2 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... Mcleansboro, Rend Lake Area, Sesser, Ina, Dahlgren, Waltonville, Bonnie, Belle Rive, Ewing, Nason, Broughton, Macedonia and Belle Prairie City. - http://www.weather.gov/safety/flood
Effective August 12, 2026 at 7:12 PM ET · Expires August 12, 2026 at 10:15 PM ET
Event Details
Event Type
Flood Advisory
Severity
minor
Issued By
NWS Paducah KY
Expires
August 12, 2026 at 10:15 PM ET
Last Checked
1 minute ago
What To Do
📋 Official NWS Guidance
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.
Also In Effect For
This same Flood Advisory also covers:
Other Active Alerts in Illinois
Flood Advisory
Flood Warning
Flood Advisory
Severe Thunderstorm Warning
Severe Thunderstorm Warning
Severe Thunderstorm Warning
Get Flood Advisory Alerts for Jefferson County
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Frequently Asked Questions
What does a Flood Advisory mean for Jefferson County, Illinois?
Minor flooding is expected — not severe enough for a warning, but potentially inconvenient or hazardous for travel.
Is this Flood Advisory currently active?
Yes — this alert is active as of our last check (1 minute ago). It's set to expire August 12, 2026 at 10:15 PM ET.
How do I get notified about Flood Advisory alerts for Jefferson County?
Download StormCast free on Google Play and set Jefferson County, Illinois as one of your monitored locations. StormCast checks the NWS feed continuously and pushes alerts like this directly to your phone — even with the screen off.
What other areas does this alert cover?
This same Flood Advisory is also in effect for Franklin County, Hamilton County.