Xinhua News Agency, Beijing, April 25 (Reporter Ni Yuanjin) The Beijing Meteorological Observatory announced on the evening of the 25th that the strong winds that had been blowing for 6 days and 6 nights ended in the afternoon of the same day. Affected by the continuous replenishment of cold air heading south, Beijing began to experience a round of high winds during the night on the 19th. The wind was strong during the day, with gusts of 7-9, and weakened at night, with gusts around 5-7.

  Zhao Wei, chief forecaster of the Beijing Meteorological Observatory, said in an interview on the 25th that this round of windy weather lasted for several days, resulting from a long-wave adjustment in the East Asian trough, which led to the continuous development of strong high-altitude low vortexes and low troughs in Northeast China. In turn, the North China region has been in the northwest air flow control behind the trough (vortex).

  "Under the guidance of the high-altitude northwest airflow, strong cold air continues to south to affect Beijing, resulting in strong winds that last for six days and six nights, which is also in line with the seasonal characteristics of Beijing's windy spring." Zhao Wei said.

  During this round of strong winds, around the noon of the 24th, the sand and dust that appeared in the Hunshandake Sandy Land of Inner Mongolia rapidly developed and expanded to the southeast with the northwest airflow. The sand and dust front entered the sky over Beijing at about 14:00 on the 24th, and the dust weather was at 24 It affects most parts of Beijing from evening to evening. On the morning of the 25th, sand and dust moved out of Beijing.

  According to the current forecast, with the gradual weakening of the wind on the evening of the 25th, the continuous gale weather ends. In the coming week, there will be no obvious cold air impact in Beijing. The weather will be mainly sunny to cloudy, the wind will be generally low, and the temperature will rise.

  For Beijing, spring is a season with strong winds. Meteorological department data show that since 2000, there have been 12 gale weather processes with gust 6 and above and duration of 4 days and above, of which the longest gale weather process is 9 days (2010 4 May 5-13).

  "March and May are also the months when strong winds frequent Beijing." Said Dr. Zhang Yingjuan of the Beijing Climate Center. Since 2000, there have been 13 strong winds with gusts 6 and above and durations of 4 days and above in March. Process, the longest duration of gale weather process is 7 days (March 20-26, 2010); in May there were 15 gale weather processes of gust 6 and above, duration of 4 days and above, duration The longest gale weather course is 8 days (May 5-12, 2010).