Weather Report for November 11, 2015

The first 2.5 hours of the night were lost to clouds not mentioned in the weather forecast. Then, except for a brief period just after midnight, the sky remained clear and over a dozen blazars were observed. It was very cold with the temperatures at or below freezing during the entire night. This was well over 10 deg F colder than on the previous night, and as expected when the temperature changes this much, the seeing was awful (3-5 arcsec).