An Environment Canada fog advisory covering southeastern Saskatchewan says that visibility could suddenly be reduced to zero on Thursday morning.

The advisory states that dense fog is covering southern Saskatchewan and western Manitoba, though it should dissipate Thursday morning.

A map showing the southeast corner of Saskatchewan is under a fog advisoryAs of 5 a.m., the entire southeast corner of Saskatchewan was under a fog advisory (image from Environment Canada's website)

The province's Highway Hotline says visibility is reduced in the area.

"Travel is expected to be hazardous due to reduced visibility in some locations," said the fog advisory. "If travelling, be prepared for areas of near-zero visibility."

You could still run into delays on highways in the southeast once the fog lifts. The Highway Hotline says over-dimensional loads expected to be travelling on Highway 39 and Highways 1, 9, and 48 around Moosomin and Kipling.

You can check the latest highway conditions here, and click here for more weather information.