The meteorology world is quarreling over what a blue moon is. When the earth gets two full moons in one month weather people will tell us that the second is a blue moon. This morning we hear that is not right, when tonight's full moon rises it’ll be a “seasonal blue moon” — the third of four full moons in a season. A seasonal blue moon hasn’t happened in nearly three years, EarthSky reports.
From weather.com, "That we call two different events blue moons is a relatively recent error." I'm sort of disappointed that weather experts in earth and sky have been wrong. I mean, if you can't trust your weather people who can you trust? :)