Errr, Winnerhofer. Why were you trying to fly OVER a thunderstorm at your level????
And why did you talk about flying THROUGH the top of a thunderstorm in a previous post???
Dude, you must go AROUND thunderstorms, and stay at least 20 nm away from them, and on the upwind side. They are bloody dangerous.
Perhaps you should dig out your meterology notes and refresh your memory.