Wrote Jefferson in 1804:
A change in our climate is taking place very surely. Both heat and cold are becoming moderate within the memory of even the middle-aged, and snows are less frequent and less deep.
(Thanks to Travis Holte)
UPDATE Jefferson in 1809:
Snow is nearly a thing of the past.
(Thanks also to Travis Holte)12:08 pm on February 22, 2011 Email Llewellyn H. Rockwell, Jr.