We got the bad luck of lots of lightning "nearby" (could see in the distance for hours, but none seemed super close to the park) and light rain. The carousel stayed open even in this weather. Mario Kart, Monsters, and the Toothless meet and greet were open, as were the two shows, and I expect Ministry would have been (it was preannounced to close early that day).
As a side note, the very dark skies and lightning made the mood in Darkmoor even stronger...
As a side note, the very dark skies and lightning made the mood in Darkmoor even stronger...