YOU SAID:
I went to the swimming pool today and it thunderstormed.
INTO JAPANESE
今日はスイミングプールに行き、雷鳴が吹きました。
BACK INTO ENGLISH
Today I went to the swimming pool, thunder was blowing.
INTO JAPANESE
今日私はスイミングプールに行き、雷が吹いていた。
BACK INTO ENGLISH
Today I went to the swimming pool, thunder was blowing.
Well done, yes, well done!