Near zero visibility in fog is expected or occurring.
Dense fog patches are still being reported across portions of southwestern Ontario early this afternoon. Although the fog will dissipate somewhat this afternoon, it is expected to become more widespread again this evening.
Travel is expected to be hazardous due to reduced visibility in some locations.
Fog advisories are issued when near zero visibilities in fog are expected or occurring.
Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to email@example.com or tweet reports using #ONStorm.