You probably noticed: It's really cold outside. But it's not just you.
According to the National Weather Service and meteorologist Eric Holthaus, all 50 states hit 32 degrees or lower on Tuesday.
Yep. Even Hawaii, where Mauna Kea, a dormant volcano reaching 13,800 feet above sea level, was below freezing.
This map from the National Weather Service's Twin Cities office shows you that: