Clear weather after a typhoon has passed; figuratively, calm after a storm or disturbance.
台風一過の朝、空は澄み渡り海も穏やかだった。
On the morning after the typhoon passed, the sky was clear and the sea was calm.
台風一過で被害の全容が明らかになった。
After the typhoon passed, the full extent of the damage became clear.
騒がしかった社内が、トラブル対応が終わって台風一過のように落ち着いた。
The noisy office calmed down like the calm after a typhoon once the trouble was handled.