In particular, from my
reading of the (stolen) e-mails, it looked like the problem was that there are
conflicting studies on exactly what is going on with storms regarding whether they were getting stronger or weaker, so rather than saying something that potentially inaccurate (that storms were getting stronger, since there were apparently some studies suggesting that they were getting less
numerous as the wind patterns shifted) or verbose (describing the whole situation about what differing studies have to say about storms) they decided to simply drop mentioning what was happening to storms altogether and instead focus the bullet point on the part that they were confident about, namely that particular wind patterns were changing.