Was in 747-100 cargo from syd-hkg same time frame nothing was painting on radar I went back to galley to get coffee as I came back up the captain said to strap in we hit a cell rising fast went from fl33 to fl39 in seconds and wild airspeed swings then back down to fl33 all three of us looked at each other and said what the hell was that? As a side note this aircraft was number 3 off the production line !
