What started out as a clear evening similar to the previous two nights turned
into a much different beast.
After observing for nearly 3 hours in pristine conditions, small clouds
formed and dissipated on time scales of minutes for the following 3
hours. Good progress was made during this period, although photometry
for several objects had to be abandoned. Then, at about 0245 local time
the cloud cover became more uniform and for safety it was decided to
close the dome to wait and see what develops. At 0315 it rained for about
10 minutes, abruptly ending the night. It was not a lost night, however,
as nearly 10 blazars were successfully observed. The seeing started out
at about 1.7 arcsec, but was over 3 arcsec at the time of the dome closure.
