The night turned into a much better affair than expected given the weather forecast. The sky stayed generally clear, though not photometric, up until about 0300 local time. By then, moderately thick cirrus covered much of the sky and observations were slowed, but not stopped. Some differential photometry was attempted during the first half of the night, but it remains to be seen how much of this will yield consistent results. Over a dozen blazars were successfully measured for polarization. The seeing was excellent during the first half of the night (1-1.5 arcsec) after being quite poor during the first half hour after the dome was opened. The seeing degraded again after midnight (1.5-2.5 arcsec).
A strong weather front is approaching from the west. No rain is expected tomorrow,
but the strong winds in the forecast may halt observations.