What they were looking for were the storms with long return times (or very low probabilities of happening in any given year) that generated major storm surge. (wxshift.com)
Despite the very low probability of seeing seals from space, people keep coming back to contribute. (earther.com)
Of course crashes are always very low probability events — but there are occasions when they have a higher probability than otherwise, and we will certainly point those out when we see them. (acting-man.com)