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.