These maps present the pre-Christmas storm sweeping throughout Canada

Western Canadians having fun with unseasonably heat temperatures are in for a impolite awakening.

An Alberta Clipper is bringing an enormous dump of snow to the Prairies and parts of northern Ontario, adopted by a waft of frigid Arctic air.

Parts of southern Saskatchewan and Manitoba will see blizzard circumstances beginning on Wednesday morning, which Atmosphere and Local weather Change Canada (ECCC) says will make journey “harmful and certain inconceivable on account of near-zero visibility.”

Regina and different elements of Saskatchewan are additionally anticipated to get freezing rain earlier than the storm transitions to snow, making journey further treacherous.

Snow accumulation forecasting from ECCC for the subsequent three days exhibits a band stretching throughout the Prairies, throughout northern Ontario, Quebec and Newfoundland and Labrador.

ECCC’s forecast additionally exhibits giant swaths of the nation will shortly plunge into frigid climate. Regina will see a low of –23 C on Wednesday night and Winnipeg will see –19 C.

The federal climate company has additionally issued a chilly warning in elements of the northern Prairies on account of wind chills making temperatures really feel as chilly as –45 C.

This map exhibits how that Arctic air will swoop south over the subsequent two days.

This climate is bringing severe warnings from ECCC.

The company issued yellow and orange climate alerts for many of Manitoba and Saskatchewan on Tuesday.

Canada’s climate company lately modified its warning system to be colour-coded. Yellow is widespread and localized climate occasions; orange is extreme, widespread and unusual occasions; and crimson may be very harmful and uncommon occasions with excessive and extended impacts.

And a reminder: winter doesn’t formally begin till Sunday.