Weather Report for December 14, 2015

Eight days into this observing campaign and this is the first night that was clear and photometric for the entire night. Correspondingly, it was the most productive night so far, with over 20 blazars observed. The seeing was atrocious for during the first hour of the night (3-5 arcsec), but quickly settled down to a more respectable 1.5-2 arcsec for most of the rest of the night. During the last couple of hours, the seeing was 2-3 arcsec.

It is rare that the weather forecast has another winter storm beginning to dump its load of snow on the mountain in less than six hours after the end of a perfectly clear night. Prospects for observing during the coming night are not good as a second storm to hit during this campaign is on its way.