Environment Canada warns of 'near-zero' visibility as fog blankets Ottawa

A person sits at a bench in Major's Hill Park on a foggy day in Ottawa on Dec. 29, 2024. (Brad Quinn/CTV News Ottawa)

Environment Canada has issued a fog advisory for Ottawa and warning of 'near zero' visibility conditions on the roads Sunday.

The forecaster says patchy and dense fog will persist in the national capital this afternoon into tonight. Conditions are expected to clear up by Monday morning.

"Some surfaces such as such as highways, roads, walkways and parking lots may become icy and slippery as temperatures are below zero," Environment Canada says.

"Visibility may be significantly and suddenly reduced to near zero."

The weather advisory stretches towards the Ottawa Valley and cities along the St. Lawrence River, including Brockville and Cornwall.

A rainfall warning is in effect for the Kingston region with 20 to 30 millimetres of rain in the forecast on Sunday.

Ottawa weather 

Environment Canada calls for a high of 6 C, cloudy skies and rain beginning this afternoon and fog patches dissipating this morning. The weather agency says five to 10 mm of rain is forecasted.

The weather agency anticipates 10 mm of rain and temperatures near 7 C for tonight.

The warmer-than-normal temperatures will continue through Monday with a high of 10 C and a 40 per cent chance of rain. A low of 1C and a 40 per cent chance of rain are expected for the night.

Tuesday will see cloudy skies with a high of 3 C and a low of 1 C.

The average temperatures for this time of year are a high of -6 C and a low of -14 C.