Notes on the State of Virginia – Google Books
Many of the deadliest Atlantic hurricanes occurred right around that time.
The Deadliest Atlantic Tropical Cyclones, 1492-1996
Mother Nature’s Fury: 10 Devastating Historical Hurricanes, 1502-1780
http://www.aoml.noaa.gov/hrd/data_sub/perez_11_20.pdf
30 Dec 1780, 2 – Jackson’s Oxford Journal at Newspapers.com