Forecasters had predicted a night of clouds, rain, and thunderstorms. Instead, it was a mostly clear night with reasonable seeing (1.2-2 arcsec). Somehow, Kitt Peak was near the center of a dry patch of atmosphere in southern Arizona that was surrounded by the chaos of low-pressure systems. There were a few clouds to contend with during the first and last hours of the night, but in between was a great expanse of clear sky.
The good luck experienced so far this campaign will end later today
as the main storm system arrives. The poor forecast has prompted an
early end to the Bok Telescope portion of the revised campaign. The
final bonus night will be traded in for an extra night at the Kuiper
Telescope (2015 October 21 UTC) when it is hoped that the stormy weather
will have moved off to the east.