Weather Report for December 6, 2010

Generally a clear night except for light to moderate cirrus during the first two hours of the night and heavier cirrus during the last two hours. Observations were seriously affected by the cloud cover at the end of the night and a couple of targets had to be abandoned. The seeing started out at better than 1 arcsec, but it slowly deteriorated as the night wore on. During the final couple of hours of observing, the seeing was 1.5-2.0 arcsec.