Graybeard
1. The storm did not look bad enough to deviate around.
2. The line of storms was so long and uniform, it would not seem to matter where they penetrated.
3. The pilots did not have enough training in Wx radar ops.
. a. Nobody was looking at the radar returns.
1. The storms were bad enough for the flights before and after to deviate
2. Then why not return to Brazil
3. I think that 39 SA rotations since being in the A330/A340 division is sufficient to be able to use the Wx effectively
3a. No answer to that possibility.