Fog advisories that had been issued for several parts of southern Alberta earlier this week were lifted on Thursday.
People in parts of southern Alberta, including the city of Calgary, had been advised they should expect foggy conditions until Thursday afternoon.
Environment Canada issued several fog advisories across the province on Tuesday afternoon, saying “an area of fog has developed across parts of southern and central Alberta.”
“Overnight, this fog is expected to thicken, giving very low visibilities,” the weather agency said on its website.
“If travelling, be prepared for areas of near-zero visibility. If visibility is reduced while driving, slow down, watch for tail lights ahead and be prepared to stop.”
On Wednesday night, Environment Canada said that “an area of dense fog persists over portions of southern Alberta.”
“Within the fog there is also a risk of patchy freezing drizzle,” the weather agency said. “Visibilities are expected to improve on Thursday afternoon.”
Fog advisories are issued by Environment Canada when near-zero visibility is expected because of fog.
Watch below: Some Global News videos to do with fog.
Meanwhile, in parts of northern Alberta, including Wood Buffalo, people were being told to prepare for very frigid temperatures. An extreme cold warning was issued for that part of the province on Tuesday afternoon.
“An Arctic ridge, combined with clearing skies, will produce windchill values near -40 tonight,” Environment Canada said. “Windchill values between -40 and -45 can be expected in the overnight and morning hours Thursday and Friday.
“As the ridge moves into Alberta Wednesday night the warning may need to be expanded.”
On Thursday afternoon, more extreme cold warnings were issued in northern Alberta, with Environment Canada warning “a prolonged period of very cold wind chills is expected.”
“An Arctic air mass has settled into northern Alberta, clear skies will allow temperatures to fall tonight giving a period of extreme wind chills near -40. Temperatures are expected to moderate by the weekend.”
WATCH: Fog reduced visibility and led to some travel delays in Calgary on Wednesday. The morning commute was hampered by the persistent mist and icy roads. Joel Senick has more on the conditions from out in the elements.
People in areas under an extreme cold warning are advised to keep emergency supplies, including extra blankets and jumper cables, in their vehicles.
Meanwhile, Environment Canada issued snowfall warnings for parts of southern Alberta on Thursday afternoon, including the city of Lethbridge. That city is expected to see 10 to 15 centimetres before the end of the work week.
“A band of heavy snow has developed over southern Alberta,” Environment Canada said on its website. “Snow, at times heavy, will continue tonight bringing local snowfall accumulations in excess of 10 centimetres. Conditions will begin to improve before morning as the band weakens.
“Prepare for quickly changing and deteriorating travel conditions.”
For a complete list of weather warnings, watches and advisories in Alberta, click here.
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