Another foggy day, another advisory from Environment Canada

Environment Canada issued three fog advisories for Waterloo Region and surrounding areas over the weekend.

The fog began Friday night, prompting the first advisory.

Conditions improved on Saturday but the fog thickened later in the afternoon leading to the second warning.

The fog cleared somewhat on Sunday but changed once again in the afternoon.

Visibility was reduced to almost zero in some areas.

As of 8:30 p.m. Sunday night, fog advisories were still in place for Sarnia, Windsor, Chatham-Kent, London, Strathroy, St. Thomas, Hamilton, Caledon, Innisfil, New Tecumseth and Dufferin County.

Drivers are asked to slow down, watch for tail lights and be prepared to stop.