Weather Report for May 15, 2017

A somewhat lucky night of observing. Some light, scattered clouds did show up at times before 0100 local time, but just to the northwest and southeast of the observatory it was much worse. The narrow corridor of mostly clear skies allowed continued observations throughout the night. The seeing at the start of the night was 1.3 arcsec, but deteriorated to 2-2.5 arcsec after midnight.