With the monsoon moisture stream (river, really) having shifted to the east
through New Mexico and a low-pressure system beginning to lift out of
Arizona, the dome could finally be opened for the
first time in 4 days. With the low-pressure system so close, however, high
humidity and a thin cloud cap over the mountain prevented observations for a large fraction of the night. The first three and last 2.5 hours of the night were good enough to work in and
10 blazars were observed. Seeing was around 1.5 arcsec.