The sky cleared at sunset and remained photometric throughout the night.
It was an extremely cold night for this time of year, with the temperature reaching 37 deg F by morning twilight. The seeing started out at 1.5-2 arcsec.
In the last few hours, there were short periods or very poor seeing (>4 arcsec), but at the end of the night, the seeing settled back to around 2 arcsec.
