Flash Flood Warning — Union County, Ohio
Flooding is imminent or already occurring. Move to higher ground immediately — never drive through flooded roads.
Current Status
🌊 Active: Flash Flood Warning
Flash Flood Warning issued August 10 at 11:11PM EDT until August 11 at 1:30AM EDT by NWS Wilmington OH
At 1111 PM EDT, radar indicated thunderstorms producing heavy rain across the warned area. Between 2 and 4 inches of rain have fallen. Additional rainfall amounts up to 1 inch are possible. 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 may experience flash flooding include... Bellefontaine, Kenton, West Liberty, Russells Point, De Graff, Lakeview, Waynesfield, Belle Center, West Mansfield, Chippewa Park, Northwood, Roundhead, Quincy, Mount Victory, Rushsylvania, Huntsville, Ridgeway, Valley Hi, Zanesfield and Big Springs.
Effective August 10, 2026 at 11:11 PM ET · Expires August 11, 2026 at 1:30 AM ET
Event Details
Event Type
Flash Flood Warning
Severity
severe
Issued By
NWS Wilmington OH
Expires
August 11, 2026 at 1:30 AM ET
Last Checked
2 minutes ago
What To Do
📋 Official NWS Guidance
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. To report flash flooding, go to our website at weather.gov/iln and submit your report via social media, when you can do so safely.
Also In Effect For
This same Flash Flood Warning also covers:
Other Active Alerts in Ohio
Severe Thunderstorm Watch
Severe Thunderstorm Watch
Severe Thunderstorm Warning
Flood Advisory
Severe Thunderstorm Watch
Severe Thunderstorm Watch
Get Flash Flood Warning Alerts for Union County
StormCast checks the NWS feed continuously and pushes alerts like this directly to your phone — even with the screen off.
Frequently Asked Questions
What does a Flash Flood Warning mean for Union County, Ohio?
Flooding is imminent or already occurring. Move to higher ground immediately — never drive through flooded roads.
Is this Flash Flood Warning currently active?
Yes — this alert is active as of our last check (2 minutes ago). It's set to expire August 11, 2026 at 1:30 AM ET.
How do I get notified about Flash Flood Warning alerts for Union County?
Download StormCast free on Google Play and set Union County, Ohio 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 Flash Flood Warning is also in effect for Auglaize County, Hardin County, Logan County, Shelby County.