Environment and Climate Change Canada warned on Monday that this week's storm could be the worst blizzard in decades. And as of 4:02 Tuesday morning, a blizzard warning is officially in effect.

The government agency warns against any travel plans in their statement. Coming off a storm in southwest Saskatchewan that saw some residents go without power for several days, the southeast part of the province could also be hit hard.

"Stock up on needed supplies and medications now," read the statement. "Power outages are likely, rural areas in particular should be prepared for extended outages."

The blizzard is expected to begin hammering the southeast Tuesday night, and last until Friday morning.

Environment Canada predicts "widespread snowfall accumulations of 30-50 cm accompanied by northerly winds gusting 70-90 km/h giving zero visibility at times in snow and blowing snow."

The Estevan Fire Department cautioned the public on Monday to not travel during the storm.

Environment Canada expects the effects of the storm to linger after the system has passed through the area.

"Conditions should begin to improve on Friday as the winds taper off and the heaviest snow moves into northern Ontario...although the clean-up after this storm will likely last well into next week."

You can check the latest weather information here, and follow the system using radar here.