How long does the American cold wave last?

According to relevant data, on February 23, 65438, a rare cold wave swept across the United States, and the lowest temperature of some wonders was close to MINUS 50 degrees Celsius, which lasted until February 30, 65438, and the impact of this winter storm on the United States would be completely dissipated.

The cold wave moved south from the northern States to the southern States along the Gulf Coast. On the 23rd, more than 5,200 international and domestic flights were cancelled and 7,600 flights were delayed.