FYI.... my family on my mother's side have been FL for over 12 generations (I'm a 7th generation Floridian). I remember seeing my grandmother's pond in front of her house (Pierson, FL) freeze solid enough for the pack of hunting dogs to traipse across it all day long. This happened not once but several times (1960's - 1970's). It was in the mid 1970's (75-76?) that it snowed in Ft. Pierce, FL. I well remember my mother (she's 92yo now) telling me how it sometimes got so cold in Jupiter, that the mullet in the river would freeze. It wasn't all that long ago, that the water froze in my aunt's house (also Jupiter) and almost killed all her guava trees. And of course there was the historic freeze that destroyed the pineapple plantations on Indian River Drive between Ft. Pierce and Jensen Beach. It was due to "the Great Freeze" that the commercial oranges groves moved farther south from the North Florida counties (my great grandfather grew oranges in Volusia County... my grandfather owned a few blocks in the town of Jupiter and had a small grove).