This is the latest one I can recall. Probably should have been late August. Risk of sub freezing weather overnight.
Yes, its the latest one I ever remember and I have been to all of them. But, disagree with you that August is a better date - from my POV, its not. Longer nights and cooler temps in late September. When I saw the dates for 2019 - I think they were announced just after the 2018 BFSP - I was thrilled. Late September through first week of November is the driest time of the year in the mid-Atlantic. At Cherry Springs, you really do have to dress for three seasons.
As I can recall, some of the best BFSP's have been in September. In 2001, occurring just after 9/11, the viewing conditions were superb, perhaps the best I have ever seen at CSSP. There was no airline traffic and the transparency was superb. In 2002, occurring in early September, we had the Aurora for several hours on Saturday night. In 2007, Ed Ting gave the keynote and it was chilly, but clear - occurring in mid-September. There are other examples - I just beleive that late September offers a better chance for clear and transparent skies.
Anyway, just some historical perspective.
It will be interesting to see how cold it gets.
Edited by peleuba, 23 May 2019 - 09:07 AM.