Light, scattered cirrus throughout most of the night. Forecast and satellite images suggested much heavier cloud cover than was actually experienced. In preparation for working through fairly thick cirrus, the instrument was configured for imaging polarimetry. However, most available targets were observed during the night without much interference from clouds. Clouds did prevent observations during the last 2 hours of the night. Seeing was around 1.5 arcsec during the first half of the night and typically between 1.5 and 2 arcsec thereafter.