Weather Report for June 17, 2012

Yesterday's weather forecast was very accurate and surprisingly intense thunderstorms hit southeast Arizona during most of the afternoon. It actually rained at the observatory site! Skies began to clear about 2 hours after sunset and the conditions were photometric by midnight. Despite the shortening of a very short summer night, a dozen blazars were observed. Unfortunately, targets that set early were missed waiting for the debris clouds from earlier storms to dissipate. Seeing was mediocre at 1.5-2 arcsec, as expected after such a volatile day.