cold wave; cold snap
A meteorological term for a sudden, severe drop in temperature over a wide area. Commonly used in weather forecasts and news reports.
A strong cold wave is expected to hit the Japanese archipelago this weekend.
寒波の影響で、明日の朝は氷点下まで冷え込むでしょう。
Due to the cold wave, temperatures will likely drop below freezing tomorrow morning.
Northern Japan was hit by a severe cold wave.
A major cold wave is expected to arrive this weekend.
The cold wave finally eased and it's gotten warmer.