Dense fog blankets Clark County before dawn
The National Weather Service warned of patchy dense fog across Clark County early Monday, urging drivers to slow down and leave extra room.
The National Weather Service office in Wilmington, Ohio, warned drivers in Clark County of patchy dense fog early on October 12, cutting visibility to a quarter mile or less. The statement took effect at 4:43 a.m. and was set to expire by 9 a.m. NWS
Driving in it
The weather service told drivers to expect rapid changes in visibility and to allow for greater distance between vehicles. It also advised using low-beam headlights and leaving extra time to reach a destination. NWS
The morning fog followed an earlier statement issued just after 2 a.m. that had already flagged conditions favorable for dense fog developing before daybreak. NWS That statement in turn followed one issued the previous evening around 11:47 p.m. warning that low clouds clearing overnight could allow fog to form. NWS
The National Weather Service office in Wilmington, Ohio, issued this special weather statement at 4:43 a.m. on October 12, 2026.
Sources
The source filing
| Event | Special Weather Statement |
|---|---|
| Message type | Alert |
| Severity | Moderate |
| Certainty | Observed |
| Urgency | Expected |
| Headline | Special Weather Statement issued October 12 at 4:43AM EDT by NWS Wilmington OH |
| Area desc | Mason; Hardin; Mercer; Auglaize; Darke; Shelby; Logan; Miami; Champaign; Clark; Montgomery; Greene; Warren; Clinton; Brown; Highland |
| Effective | October 12, 2026, 4:43 a.m. |
| Expires | October 12, 2026, 9:00 a.m. |
| Sender name | NWS Wilmington OH |
Published by National Weather Service (api.weather.gov). This is the agency's public filing as The Lantern received it, shown with its fields named in plain English.