过去两天东北地区正在经历着一场暴风雪，局地还出现了特大暴雪，中央气象台也是三预警齐发。暴风雪天气对于出行有非常大的影响。出门大腿刚迈出一步瞬间就被风吹退了三步，真的是跟取经一样难啊。一起来了解一下暴风雪天气是怎么来的？
Make some noise if you're a fan of snow!
Yeah!
We love to be outside when it snows.
We like to go sledding, make a snow fort, or even just take a walk!
But there are some times when it's definitely not a good idea to go out in the snow!
And one of those times is during a blizzard.
A blizzard is a kind of big snowstorm.
But it's a special one!
Blizzards start in the same way that some other powerful storms start: when two big areas of air meet.
One of these big areas of air is colder, and the other is warmer.
