A full night of observing was accomplished, but conditions slowly deteriorated as the night wore on. Observations were slowed and nearly stopped by thicker cirrus clouds that moved in after midnight in advance of an approaching winter storm. Over a dozen blazars were observed for polarization but little photometry was attempted because of the cirrus clouds. Seeing ranged from 1-1.8 arcsec for most of the night, but in the last couple hours brief seeing bursts of 3-4 arcsec had to be endured.
The storm moving in from the Pacific northwest is forecast to easily wipe
out the remaining two nights of the observing campaign. High winds, clouds,
much colder temperatures, and a little snow is expected on Kitt Peak over
the next two days.