Snow followed by below freezing temperatures dipped as far south as Myrtle Beach, South Carolina and though the weather's expected to warm up as the week gets underway.

南至南卡罗来纳州的默特尔比奇，降雪之后的气温降至零度以下，尽管随着本周的开始，天气预计会变暖。

Meanwhile, more extreme winters occur as the polar jet stream, a high-pressure wind that circles the Arctic region, is destabilized by warmer air, it can dip south, bringing bitter cold.

与此同时，随着极地急流（一种环绕北极地区的高压风）被温暖的空气破坏，它会向南下沉，带来极端寒潮，导致更多极端冬季的出现。