Cold cold! Did you see the first snow in 2024?

Affected by the first cold wave in 2024, there was sporadic light snow in the western part of Chongming around midnight yesterday, and sleet in the northern part of Pudong briefly. Shanghai ushered in the first snow this year.

At 9 o’clock this morning, the temperature in most parts of the city was close to freezing point. Today, it is mainly cloudy during the day, with occasional short-term light snow in some areas. The highest temperature is only about 1℃, and the wind is strong. The wind from north to northwest is 5 and the gust is 6-7, and the wind is stronger in coastal areas along the river.

Static treasure warm reminder:

Pay attention to cold and warmth, and beware of catching a cold.

The Shanghai Central Meteorological Observatory issued a low-temperature yellow warning signal at 16: 40 on January 22, 2024: due to the influence of strong cold air, it is estimated that the minimum temperature will reach MINUS 3 degrees to MINUS 4 degrees in the morning on the 23rd and 24th, with freezing, and MINUS 5 degrees to MINUS 6 degrees in the suburbs, with severe freezing. Please pay attention to cold and warmth.

At present,

ShanghaiTwo blues and two yellowsFour warnings are high.

Defense guide:

1.Pay attention to wind and warmth when going out, and add clothes.

2.Old people and children should go out as little as possible and close the doors and windows at home.

3.Strengthen the warm-keeping measures of agricultural greenhouses and sheds.

4.The government and relevant departments should do a good job in cold wave response according to the plan.

5.Pedestrians should pay attention to anti-skid.

6.Drive carefully, keep the distance between cars, and pay attention to slow down.  

7.The government and relevant departments should do a good job in dealing with road icing according to the plan.

8.Check doors and windows, reinforce clothes racks, outdoor antennas, etc., and properly place outdoor flowerpots and other items that are easy to fall.

9.Try not to stay near glass doors and windows or billboards when going out.

10.The government and relevant departments should do a good job in dealing with strong winds according to the plan.

weather trend

Shanghai will turn sunny and cold due to the influence of cold high pressure from tomorrow, but the temperature rise is weak. The temperature will be below freezing all day tomorrow. Tomorrow morning and Wednesday morning are even more chilly, and the lowest temperature in the urban area is between MINUS 4℃ and MINUS 3℃, with freezing; The suburbs are 6℃ below zero to 5℃ below zero, with severe freezing. Although there is sunshine during the day, the temperature rise is limited under the power of cold air.

From Wednesday, the north wind gradually subsided, and the temperature began to rise slightly. By the end of the week, the highest temperature returned to double digits, but the temperature was still low in the morning and evening, so it is still necessary to keep warm and cold. On Thursday, the temperature began to rise slightly during the daytime, but the highest temperature this weekend was only about 11℃, and the temperature was still low in the morning and evening. Please continue to do a good job in cold protection and warmth. 

Why is there only sporadic snowfall in Shanghai?

Meteorologists say that the main battlefield of snowfall brought by this cold wave is not in Shanghai. Because of the powerful cold air, the snowfall has been pushed to the south. The sporadic snowfall in Shanghai for a short time is cold snow blown by cold air from the sea.

Snow is the direct condensation of water vapor in the atmosphere or the direct solidification of water droplets. Usually, there are two conditions to meet when it snows. First, there is enough water vapor to form an ice crystal layer at high altitude; Second, the appropriate temperature, that is, "the air temperature at 1500m is less than or equal to -3℃, while the ground temperature is less than 3℃", so that the snowflake will not be melted during its descent.

However, there is less water vapor supply over Shencheng today, and the water vapor at high altitude is ruthlessly driven away by cold air. It can only rely on the humid air at sea brought by the north wind to form snowfall, and the weak water vapor is only enough to bring light snow or sleet to the central and eastern parts of Shanghai.

Snow is not a common sight in Shanghai in winter. Shanghai’s maritime climate makes the temperature in winter high, and the terrain is basically a low-lying plain, which is different from the hilly terrain in Hangzhou next door. Therefore, the conditions for snow are more harsh than those in the surrounding areas. According to the meteorological data,The average number of snowfall days in Shanghai is about 5 days, and snowfall occurs from November to April, mainly in January and February.

Why can’t I see the snow?

Many netizens spit out that they are clearly in the same area, but they have not seen snow. In fact, this may be because you are not "tall" enough! The snowflake melted during the landing.

In order to see "snowflakes fluttering" on the ground, it is necessary to have certain water vapor and dynamic conditions.The key depends on the temperature distribution from high altitude to the ground.. The geographical location of Shanghai Linjiang near the sea, coupled with the relatively high temperature at sea in winter, makes the temperature distribution above us more complicated, and with the change of urban underlying surface, the precipitation phase has changed more. Sometimes "snow is fluttering" in the air, and it may turn into rain or sleet when it falls to the ground.

If you want to see the formed snowflakes,

You have to waitWhen the snowfall conditions are met

Go toA higher placeOh ~

Reporter: Li Jialing.

Photo: Li Jialing.

Video: Li Jialing

Editor: Chen Gong

Information: Shanghai Weather Release, Shanghai News Broadcasting, Shangguan News, Xinmin Evening News, and Shanghai WeChat WeChat official account.

Please indicate the official WeChat from Jing ‘an, Shanghai.

Maybe you want to see it again.

Breaking through difficulties and blocking points, frequently appearing "100%" and exploring new paths … Jing’ an "two old transformations" round residents’ dream of living in peace

Breaking through difficulties and blocking points, frequently appearing "100%" and exploring new paths … Jing’ an "two old transformations" round residents’ dream of living in peace

Zhangyuan: the 19th century garden engraved in Shanghai’s memory and future.

The deserted open space has turned into a small garden, and the community has more "small fortunate"

Add a good place to punch in, and the "Chinese Dragon" with a height of 5 meters will be unveiled! The series of activities of "Dragon with Natural Spirit" kicked off.




ShangguanNo. Author: Shanghai Jing ‘an