thundershower

noun

Etymology: From thunder + shower.

1. A rain shower accompanied by thunder and lightning.

   “The thundershower poured down on us as we ran home, but returned to a drizzle after several minutes.”

   “[S]ometimes, like the priests of Baal in the Bible, he would cut himself with knives till the blood fell upon the ground in great drops suggestive of an oncoming thunder-shower.”