Monday, June 26
<br>
TOPAZ data were recorded from 09:47 - 17:47 PDT. 

Slightly cooler today (max. of 42 C at the lidar site) and 108 F at the NLVA NWS tower. Clear skies all day, but a blowing dust cloud to the south driven by the 10-15 m/s (in the afternoon) SW winds associated with the approaching trough. Some entrainment of ozone from above 4 km by the mixed layer, but little accumulation near the surface where the peak mixing ratios remained less than 60 ppbv.