Some commercial forecasters have a "wet bias" (https://en.wikipedia.org/wiki/Wet_bias https://en.wikipedia.org/wiki/Wet_bias). They intentionally overestimate t

Some commercial forecasters have a "wet bias" (https://en.wikipedia.org/wiki/Wet_bias https://en.wikipedia.org/wiki/Wet_bias). They intentionally overestimate the odds for precipitation on the theory that people are happier if it doesn't rain when they were planning on rain than they would be if it rained when they did not expect it.