The temperature tonight stayed a constant 49 deg F; 25 deg F warmer than just
two nights ago. The sky over all of Arizona was flawless and the winds
on Mt. Bigelow very light. In other words, this was a great night for observing
and a lot was accomplished.
The seeing started out at 1.2 arcsec, but quickly worsened to around 2-2.5
arcsec for the rest of the night. This was expected as the primary mirror
must be much colder than the rapidly warming atmosphere.