High, fairly thick clouds came over southern Arizona from a cut-off low
pressure system to the southwest in the first hour of the night. This system will likely
continue to adversely affect the observing campaign over the next
several days. Observations were made through the variable cloud cover
for about six hours. By about 0300 local time, the sky finally cleared
and work could continue at the normal pace. Even some photometry was
obtained. The seeing was much improved over the previous nights. Rarely was
the seeing worse that about 1.7 arcsec and it was as good as 1.2 arcsec
near the end of the night.
