MDM Observatory 2.4m Telescope Observing Report for 2017 Mar 27

Observer(s): Thorstensen
Institution(s): Dartmouth

Instrument: Modspec + echelle CCD

Worked for 6 hours (off and on through the night)
Conditions were Mixed most of the night.
No equipment or software problems were encountered.

Seeing and Weather:
   Clouds from 1AM until dawn.
   Beg: Seeing 1.5 arcsec, Clear, Winds High
   Mid: Seeing 1.5 arcsec, Patchy Clouds, Winds High
   End: Overcast, Winds Moderate

Observing Summary:

The night began beautifully clear, but windy.  Some high clouds
blew through around 11 PM, but then about 1 AM it clouded up 
abruptly.  I figured this, too, would pass, but noticed KPNO was
closed, and on checking the radar was surprised to see storms
approaching -- these had not been forecast at all!  I closed, and 
an hour later an electrical storm passed by maybe 10 miles to
the north.  

The front took several hours to pass, but by dawn it was clearing
off nicely, with low humidity and no hint of rain coming on the
radar.  I opened just after the beginning of twilight and 
followed a bright high-priority target until it was too bright.
Hadn't expected that!

No technical problems; in particular, the dome returned
to its contacts accurately at the end of the night.

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Submitted on 2017 Mar 28 [8:15:17]