It is rare for snow to fall in the U.S. state of Florida (and surrounding areas) because freezing temperatures in Florida are generally caused by the cold weather and dry winds of anticyclones. Frost is more common than snow, requiring temperatures of 45 °F (7 °C) or less at 2 m (7 ft) above sea level, a cloudless sky, and a relative humidity of 65% or more. In the general case, for snow to occur, the polar jet stream must move southward through Texas and into the Gulf of Mexico, with a stalled cold front across the southern portion of the state curving northeastward to combine freezing air into...