Rain and snow showers hit the observatory off and on during the day as the main storm front
came through southern Arizona. There was, however, much less precipitation than
forecast. The mountain top was in clouds until just before midnight. The
sky cleared rapidly, but the humidity stayed too high to open the dome
until after 0230 local time. Several blazars were observed until the end
of the night in clear skies and seeing of 1.5-2 arcsec.