Near zero visibility in fog is expected or occurring.
Dense fog is expected to continue until near noon in some locales.
Visibility may be significantly and suddenly reduced to near zero. Travel is expected to be hazardous due to reduced visibility.
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 to #ONStorm.