Aerotow to 3000, released en route to Mnt Diablo. Climbed in covergence lift to 3200. Sustaining lift 2 miles NW of airport, over Vasco Road. Landed 12.
Aerotow to 3400 over Los Voqueros reservoir. Looking for some wave off Diablo. None found. Found same thermals north of airport. XWind landing 10kt component from left.
Aerotow to 3200 near Brushy Peak. Released in lift and drifted SE of airport. Cu's forming near pumping station. Thermalled between 1600 & 2800. XWind landing 10kt component from left.
Aerotow to 2200 released over Discovery Bay. Over developed conditions over the airport, some holes at DB. Found good 4-5kt lift and climbed to bases at 2500. Terminated because of decreasing visibility near the airport.