Afternoon tasks:
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In preparation for the dark run, Steph ran through the afternoon setup of the 
2.5-m instruments and PT. 

The current plan is for the PT biases, dome and twlight flats, pointing 
correction and focus to be completed before the PT is handed over to the 
observers. 

The 2.5-m instruments and the DA will also be checked during the afternoon, but
the telescope itself will be checked by the night's observers.

Night "observing":
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There are thick clouds at sundown. We close the PT and finish the telescope
checkout, but do not open.
Around 11:00, it looks as if it might be clearing, and we consider opening.
Before we do, it clouds over again and the humidity rises.

Around midnight, the clouds mostly clear up, but the humidity is too high to
open.

At 3:20, the humidiy finally drops enough that we can open, but just barely.
We open, and obtain a star in the engineering camera. Clouds are a problem
in focusing, and we eventually loose our star to clouds. As we are attempting
this, the dewpoint depression creeps back down to 4 degrees and the are 
lightning strikes within 15 miles; we close at 4:20.

By the time we finish closing and changing the spectrograph dewar, the clouds
are gone, but it is too late to reopen.