Weather Report for July 7, 2013

Two thunderstorms hit Kitt Peak during the daylight hours, giving us some much needed rain (and some hail). By 2230 local time, the sky was in pretty good shape and the thunderstorm complex had moved far enough to the north that work could begin. The sky remained mostly clear until around 0200 and then began to quickly deteriorate. Most of the last 1.5 hours of the night was lost to thickening clouds. The seeing during the useful part of the night was excellent (1-1.4 arcsec) and more than a half dozen blazars were observed. Unlike during past nights, photometry could be obtained for several targets.