An Arctic air mass over parts of southern Saskatchewan and southern Manitoba continues to bring extremely cold temperatures and warnings.

Overnight lows of –30 C and colder combined with northerly winds of 10-15 km/h are producing extreme wind chill values of –40 and colder, Environment Canada says.

In Manitoba, the weather agency has issued extreme cold warnings for a swath of the northwest corner, where the wind chill could drop to –45, as well as a large chunk of the south and most of the west…