Weather in Calgary: Fog will begin through Tuesday, but road conditions will gradually improve

The rain held off Monday, helping road crews in central and southern Alberta clear ice and snow from major highways.

As of 7 a.m. Tuesday, 511 Alberta reported that most major and secondary highways were back to dry or partially snowed areas, compared to mostly icy and snowy conditions 24 hours earlier.

An overnight breakdown of the atmosphere in southern Alberta on Tuesday morning prompted Environment and Climate Change Canada to issue a fog warning for “(a) dense fog with near-zero visibility” in the southeastern corner of the province. A good portion of the TransCanada Highway between Calgary and Medicine Hat was in this council.

Visibility is expected to improve Tuesday afternoon, according to the National Weather Service. A similar overnight unit with a light southwesterly flow combined with a moist air mass could produce fog again Wednesday morning.

Alberta and British Columbia will see little change over the next few days, with daytime highs in Calgary expected to be slightly below seasonal and lows slightly warmer than average. Cloud cover continues to inhibit the thawing of natural surfaces, but roads and sidewalks may undergo a gentle freeze-thaw cycle that polishes surfaces at the start of the day and after sunset.

For Environment Canada's latest weather alerts on climate change, click here. 511 Alberta driving conditions can be found here or click here for Drive BC updates.