When it's freezing cold on the Gulf Coast, usually the air is dry and skies are clear. In this rare circumstance, low pressure over the Gulf of Mexico will send moisture into a cold pocket of air over the coast, likely resulting in snowfall.

Denver is soldiering through a blast of freezing cold and snow Saturday morning, as winter weather generated by a polar vortex continues to hit the Front Range. National Weather Service meteorologist Bruno Rodriguez said the Denver metro area and communities along Interstate 25 received some of the heaviest snow among Colorado cities overnight.