Weather Report for July 16, 2015

Observing started about 30 minutes late tonight as debris clouds from afternoon thunderstorms in the area had to clear out. After that followed about 5 hours of very clear skies and good observing, with seeing of around 1.5 arcsec. Just over a dozen blazars were observed in this period. After midnight, a thunderstorm cell formed unexpectedly and very quickly about 20 miles to the northeast of Kitt Peak. Operations continued with a great light show from the storm. At about 0230 local time, debris clouds from the dissipated storm came over the observatory and the dome was closed for about an hour. Three more targets were observed in the final hour of the night.