Has Beijing's first low-temperature blue warning started this winter?

Beijing started "extremely fast refrigeration", and the first low-temperature blue warning started this winter.

Yesterday, 20 18 World Snow Day and International Children's Ski Festival started, and 700 children "played with snow" in Yanqing.

Yesterday, the first snow fell in Beijing this winter, and the first low-temperature blue warning was launched-the lowest temperature of "extremely cold" in Beijing was-12℃

With the arrival of the first snowfall in Beijing since this winter. The temperature in Beijing has also started the "extremely cold" mode, and the blue warning signal of continuous low temperature has been started for the first time this winter. This week, the highest temperature during the day is only 0℃ to -4℃, and the lowest temperature at night is -8℃ to-12℃.

According to reports, as of last night 19: 00, 74 multifunctional snow removal vehicles, 166 snow melting vehicles and 16 17 snow-sweeping and ice-shoveling workers of the Environmental Sanitation Group had all been put in place to cope with the first snow in Beijing.

At 8 o'clock yesterday morning, high-altitude areas such as Foyeding in Yanqing, Haituo Mountain and Zhangjiazhuang Village in Mentougou took the lead in snowfall. There is not much snowfall, but the ground is white. The meteorological department predicts that there will be a city-wide light snow weather process from last night to this morning. There will be light snow in the plains, small to medium snow in the western and northern mountainous areas and southern areas, and the main snowfall period in the urban area will appear around 22: 00 yesterday to midnight. Snowfall is mainly concentrated at night, which may be more obvious this morning.

Although there is snowfall, there are strict standards for the "first snow" in Beijing: snowfall was observed at 20 artificial stations 10 stations in the city; Or 5 stations in the urban area (Chaoyang, Haidian, Fengtai, Shijingshan and Meteorological Observatory) observed snowfall; Or when snowfall is observed at three or more of the five stations in the urban area (same as above), and at least 1 station has snowfall exceeding 0. 1 mm, such snowfall can be defined as first snowfall.

This is why there has been light snow or sporadic light snow in the western and northern mountainous areas of Beijing before, but it can't be called the "first snow" in Beijing. It is understood that the first snow day in Beijing is165438+1October 29th (198 1 year--20 10/year average). As of yesterday, the first snow in Beijing this winter has been 53 days later than normal. However, the date of the first snow this winter is generally within the normal range. According to meteorological records, the latest first snow in Beijing has been from 1983 to 1984 in winter, and it has been delayed until February 1 1. Followed by winter from 20 10 to 20 1 1, the first snow day is 20 1 1 February 10.

It is understood that from 20 171October 23 to 20 181October 20, there has been no effective precipitation in Beijing for 90 consecutive days. On record, the longest continuous days without effective precipitation in Beijing reached 1 14 days (197010.25-1971.02.15 days).

Affected by strong cold air, Beijing will enter the "extremely fast refrigeration" mode from now on, and there will be continuous low temperature weather. This week, the highest temperature during the day is only 0℃ to -4℃, the lowest temperature at night is -8℃ to-12℃, and the lowest temperature in mountainous areas is-17℃ to-13℃. In addition, there are about 4 northerly winds from 22nd to 24th, and the gusts can reach 6 or 7, and the wind-cold effect is obvious. Yesterday afternoon, the Municipal Meteorological Observatory issued the first blue warning signal of continuous low temperature this winter. It is predicted that there will be continuous low temperature weather in Japan from 22nd to 24th, and the daily minimum temperature in the plain area will be lower than-10℃.