Calgarians are basking in spring-like conditions while residents of eastern Canada and the northeastern U.S. are getting walloped with a major snowstorm.

A number of flights were delayed or cancelled across the country due to the weather down east.

At the Calgary International Airport, some WestJet and Air Canada flights to Toronto, Hamilton, Montreal, Kitchener, Halifax and Newark were cancelled on Friday.

As were some of the flights coming in from the same eastern cities.

Many flights in and out of Toronto were also cancelled and Toronto's Pearson International Airport is urging passengers to check flight information before heading out.

A snowfall warning remains in effect for the rest of the day for almost all of southern Ontario. Environment Canada predicts 15 to 25 centimetres will fall on Toronto by day’s end.

Areas east and west of the GTA could be digging out from as much as 30 centimetres of the white stuff and some freezing rain and ice pellets are possible over the extreme southwest.

The storm is the result of a double-whammy of an Alberta clipper and a Texas low that collided over southern Ontario. The low pressure system is expected to head out to the Maritimes Friday night, where it will merge with another storm that's currently affecting parts of New England.

That storm will intensify as it tracks south of Nova Scotia Saturday, Environment Canada warns, bringing heavy snow, winds of up to 80 km/h, and blowing snow to southern New Brunswick, P.E.I., and many parts of Nova Scotia. The blizzard conditions in the Maritimes are forecast to begin near midnight Friday, with a total snowfall of up to 30 centimetres by Saturday evening.

For information on arrivals and departures, visit the Calgary International Airport website.