I launched at 13:43 (I had sunk out after ten minutes on my first
flight, while Jim, Douglas and others were skying out) and got to just
below base east of launch about 15 minutes later. The first photo was
taken at 14:15. By 14:30 base had dropped quite a bit over the valley
and around 15:00 we were soaring Sugar, occasionally making it back to
launch altitude.
The drop in cloudbase probably coincided with the sea breeze kicking
in. I didn't notice any convergence.
Jacques