Is it snowing in Shanghai? 2023

Light sleet began to appear in northern Shanghai in the middle of the night of June 5438+February 65438+May, 2023. From June 65438+February 65438+June 6, 2023, short-term light snow or sleet appeared in most parts of Shanghai, including Jiading, Fengxian and Chongming.

In 2023, Shanghai experienced a rare cold wave weather. 65438+February 15, the average temperature of Xujiahui station in the urban area is lower than 10.0℃, and the temperature in Shanghai will continue to be low, with the daily maximum temperature lower than 10℃. This means that 65438+February 15 marks that Shanghai has officially entered the winter in the meteorological sense.

According to historical data, the winter time in Shanghai is generally 65438+February 5, so this year's winter is delayed by 10 days. The latest winter date in history is 202165438+February 25th, 20 days later than normal.

The reasons for the formation of snowfall mainly involve the following factors:

1, Humidity: The premise of snow is that the air contains enough moisture. When the humidity in the air reaches the saturation point and exceeds the saturated water vapor content of the air, the water vapor will condense into small water droplets or ice crystals to form raindrops or snowflakes.

2. Low temperature: Low temperature is a necessary condition for the formation of snowflakes. When the temperature drops below zero, water vapor will easily condense into ice crystals and form snowflakes. At higher temperatures, water vapor is more likely to exist in liquid form and form raindrops.

3. Upward movement: The formation of snowflakes also needs the upward movement of airflow. When the warm air meets the cold air, the warm air is pressed by the cold air and rises to form a cloud, and the water vapor in the cloud gradually condenses into ice crystals during the rising process, and finally forms snowflakes.

4. Condensation nuclei: The formation of snowflakes also requires the existence of condensation nuclei. Condensation nuclei are tiny solid particles, such as dust and pollen, which can provide a basis for water vapor condensation, making it easier for water vapor to condense into ice crystals and then form snowflakes.

Reference to the above content: Baidu Encyclopedia-Shanghai