BERLIN—Meteorologists warned Thursday that northern Europe could be battered by a series of storms over the coming days after strong winds swept across the region overnight, killing at least five people, downing power lines and causing widespread travel delays. Train service was halted in Scotland, Wales, parts of England and the Netherlands due to trees and power lines that fell during the storm, named Storm Dudley by Britain’s Met Office weather service. Amsterdam’s Schiphol Airport warned travelers that flights would be delayed due to the high winds. Lufthansa and other airlines also canceled several flights due to the storm, which was nicknamed Ylenia in Germany. The Dutch rail company, NS, said it was cancelling all domestic and international trains Friday from 2 p.m. as the country’s weather service issued a warning for high winds. “It is possible that trees will blow onto tracks and cause dangerous situations,” the service said. …