I've seen 1 so far in a clear sky and very cold temperatures, 27.9 F now, here in NE Florida.
03:40 est, 3 more observed, 2 bright 1 faint, 1 came in at about 80 degree's behind me. Temperature 27.5 F.
04:30 est, 3 more, including a very wide trail that resembled a fresh 747 vapor trail. Temp 27.1 and frankly too cold for obs.
Fortified with hot chocolate.....
05:22 est, 2 more, one faint, one bright. temp 26.8 F.
05:57 est, 4 more, all bright. Temp 26.4 F.