Forecast was for heavy thundery slow moving showers. The small team who did show up were treated to a morning of benign dry weather, albeit with Cu at 1300 feet. A good number of training flights done in the PW6 and a one day course almost completed in the K13. JUst before we saw the first lightning, the ASH launched and ended up having to "hold" at Hullavington while a thunder shower passed to the south of AD. Rain didn't stop play, but at around 13:30 there were at least 3 thunder cells within 5 miles of the airfield and after watching the lightning for while, we decided it was time to pack away. The airfield was still dry when I left at 16:00, which is more than I can say about the journey home.