Weather Report for April 20, 2015

Mostly clear skies during the night, but there were brief episodes of extremely thin cirrus. At just before 0200 local time, thick cirrus built up over the Santa Catalina mountains and this hampered observations for nearly 2 hours. Most of the photometry obtained will be from the early portion night. Over a dozen blazars were observed and the seeing was more stable than on previous nights of the campaign (1.3-1.8 arcsec).