From T-shirts to padded jackets: Why Korea's October weather swung so wildly

Koreans went from wearing short sleeves to pulling out padded winter jackets last month as temperatures swung dramatically between summer-like heat and early winter chills. The reason, meteorologists say, was a massive high-pressure system thousands of kilometers away over Russia's Ural Mountains. The atmospheric phenomenon, known as "Ural blocking," disrupted the usual flow of weather systems, allowing cold Arctic air…