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A car slid off Highway 102 and came close to falling into Miller Lake, N.S., on Thursday morning. The driver was not seriously injured. ((Phonse Jessome/CBC))

A winter storm warning remained in effect for Prince Edward Island Thursday night, but weather elsewhere across Atlantic Canada was improving after high winds, heavy snow and rain caused transportation headaches during the day.

Environment Canada was forecasting generally clearer skies throughout the region for Friday, with rainshowers and a few snow flurries in St. John's.

Schools all around the Maritimes were closed Thursday as the fourth storm in two weeks hit the region.

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In New Brunswick, Greater Moncton Codiac Transit pulled its buses from the roads Thursday afternoon, citing excessive snow and ice. Acadian Lines cancelled its bus service for the day in Saint John, Fredericton, Moncton, and Halifax.

Most flights out of Moncton were cancelled until at least 8:30 p.m. AT Thursday.

The streets of Halifax were covered in slush, and there were numerous car accidents across the city Thursday. Parts of southwestern Nova Scotia were hit by freezing rain. By early afternoon, much of the snowfall in Halifax had stopped.

In Sydney, rain was forecast for the evening, followed by flurries and then cloudy with sunny periods on Friday and a high of –1 C.

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Despite blowing snow at the Charlottetown Airport, flights were mostly listed as on time Thursday. ((CBC))

Flight delays occurred in Halifax and Moncton on Thursday. In Charlottetown, there were some cancellations.

Thursday evening, Air Canada was still warning at its website of possible delays and cancellation of flights to and from Saint John, Fredericton, Moncton, Charlottetown and Sydney. The airline asked that passengers check their flight status online prior to leaving for the airport or call Air Canada's automated flight information system at 1-888-422-7533.

Similarly, Porter Airlines in Toronto said passengers could check their flight status at the airline's website or by phoning the Porter call centre at 1-888-619-8622 from 5:30 a.m. to 11 p.m. ET. 

Eleven flights out of Toronto's Pearson International Airport bound for the three major airports serving the New York City area were cancelled early Thursday. There were also cancellations to Boston, Moncton, N.B., and Washington, D.C.

Out of Billy Bishop Toronto City Centre Airport, one early-morning flight to Boston and three flights to Newark airport in New Jersey were cancelled.

The U.S. storm was also caused flight delays and cancellations at Trudeau airport in Montreal.

With files from The Canadian Press and The Associated Press