Weather Report for June 10, 2010

This night starts the eighteenth observing campaign for the Fermi/Steward blazar monitoring program. It also marks the first night at the Kuiper telescope since 2009 November. The night began with cirrus covering large swaths of sky. By midnight, the cirrus was finally pushed to the east by an oncoming front. Photometry was difficult during the first half of the night because of the persistent thin clouds. Polarimetry was not seriously affected. Seeing varied between 1.2 and 2.0 arcsec, but hovered close to about 1.5 arcsec during most of the night.