Weather Report for July 18, 2012

Except for occasional debris clouds from the afternoon's thunderstorms moving up from the south, this was an excellent and very productive night. Some photometry was thwarted by the unwanted clouds, but operations continued throughout the night. The seeing was excellent, with periods of sub-arcsec seeing interspersed in conditions that resulted in seeing of better than 1.5 arcsec during the entire night.