Storm
Tempest
noun
The kanji and the word are exactly the same. That means they share meanings as well.
The reading is the reading you learned with the kanji.
「彼女、もしかして本当は全然怒ってないんじゃない？」「ただの嵐の前の静けさだよ。」
"Isn’t it possible that she really isn’t that upset?" "This is just the calm before the storm."