Weather Report for April 23, 2012

The night began as did the previous night: photometric skies and fairly good seeing of about 1.5 arcsec. However, debris clouds from afternoon build ups were not far from the observatory to the south and east. These clouds started to seriously affect observations by midnight. Observations continued until the end of the night, but the going was very slow with frequent, relatively short stops in the data taking caused by thicker patches of cloud. Only a little over half of the number of objects could be observed than during a clear night of the same length and much less spectrophotometry could be obtained.