The past-tense of to cast is cast, not *casted. The past perfect of to cast, likewise, is was cast, as in
And the great dragon was cast out, that old serpent, called the Devil, and Satan, which deceiveth the whole world: he was cast out into the earth, and his angels were cast out with him.Revelation 12:9
Similarly, the past-tense of to forecast is forecast, not *forecasted.
He forecast that the German bund rate would increase from its level of 25 basis points a year ago.Robert Huebscher, “Gundlach’s Forecast for 2018“, Advisor Perspectives, 9 January 2018
For some reason, I keep seeing “forecasted” all over the place, especially with reference to predicted earnings and so forth in business, but also with reference to the weather.
I suppose we’ll be seeing “beated” and “betted” and “hitted” and so on, as well.