Weather Report for April 7, 2011

The first half of the night was completely lost to a storm system, which managed to produce actual rain. The sky started to clear at about midnight and the first blazar was acquired in the slit at about 0100 local time. The sky was clear for about 3 hours and then clouds showed up again in the last hour of the night. Over a half dozen targets were observed during the good parts of the night, including the first observation of 3C 454.3 this observing season as it barely rose above the treetops at the start of morning twilight. Although the seeing started out at an impressive 1.3 arcsec, it rapidly worsened to 2-2.5 arcsec.