Weather Report for February 14, 2012

The first in a series of storms aimed at Arizona started pushing into the state this evening. Winds were strong, but the sky was clear for the first 3 hours of the night. The seeing was between 1.5 and 2 arcsec, though brief seeing bursts of greater than 2.5 arcsec were not uncommon. The humidity and winds reached levels that forced a stop to observations at 2230 local time. Conditions improved by 0200 to resume observations. However, cirrus had moved in by this time and a 3rd quarter moon was in the sky. Data were collected until 0500 when the humidity rose sharply and fog formed on the mountain top, ending operations for the remaining hour of the night. Nearly a dozen blazars were successfully observed during this marginal night.