I spent my formative years of flight training at OWB. I was a line boy and student at Ayer Flying Service. Back in the late 60s all of their instructors were seasoned pilots and the Owner kept a sharp eye on the operation and a misadventure like this would never have happened. Thunderstorms could roll into OWB quite quickly but were always forecasted pretty well. Sad that with all the electronic marvels in light aircraft today people still blunder into severe weather.