An Extreme Cold Warning is in effect for most of central and northern Alberta, including the City of Edmonton and surrounding areas.
Temperatures will drop into the -30s overnight and into Tuesday morning with the potential for one or two spots to get close to -40.
Wind is expected to be light through the morning hours. However, even a 5 to 10 km/h wind could produce dangerously cold wind chills in the -40s. Check your local conditions before heading out and be prepared to cut short any outdoor activities.

In the city, wind chill near -30 are anticipated overnight with temperatures hitting -30 (and possibly even a few degrees colder) Tuesday morning.
Wind will pick up to around 10 km/h by midday and through the afternoon. So, wind chills near -35 are likely around noon and wind chills in the -30s are expected Tuesday afternoon.
Wind chills in the -30s can produce frostbite on exposed skin in as little as 10-30 minutes, while -40s wind chill can produce frostbite in as little as 5 to 10 minutes.
This is will be short-live deep freeze as temperatures start to climb Tuesday night. Edmonton should be up around -12 by Wednesday morning and in the -2 range by Wednesday afternoon.