Been talking about this 18 hour+ duration snd like others said cold up top so fluffy and dark and it could be .30/31 and we would do fine but it will be colder.
I think the hobby of weather snd winter weather especially is nowhere near dumb. A bit damning honestly but our very keen interests just aren't matched with very keen tools. Thats frustrating but not dumb.. DC area also needs almost everything to go right
If its about 15 around DC at 1am then unless there was a strong cold frontb 8 or so hours before then daytime highs preceding and following ranging 25-30