You Know It's Winter When...

Hawaii is expected to get 3 feet of snow.

source

To be fair, the mountain peak it will fall on is 14,000 feet in the sky.  But still!  This is a state with the best weather in the United States.  You can wear shorts and a t-shirt all year.  Or you could wear no shorts and no shirt and you would still be comfortable!

http://www.usatoday.com/story/news/2016/12/03/hawaii-could-get-another-foot-snow-sunday/94890212/