The Central Meteorological Observatory issued six early warnings, and the cumulative temperature drop in some areas reached more than 20°C. The cold wave is expected to last from 8:00 on February 21 to 8: 00 on the 23rd, with daily average or minimum temperatures generally falling by 6 to 12 °C.
Heavy fog is expected from day to night on the 21st, there will be heavy fog in the southwestern waters of the East China Sea, the coastal waters of southern Zhejiang and Fujian, with visibility less than 1 kilometer. The new snow depth in some of the above-mentioned areas is 3 to 7 centimeters, and can reach more than 10 centimeters.