Why is the weather random pattern in Shandong?

Recently, the weather in Shandong has entered a "random mode". Long Johns and umbrellas are leaving.

By the end of 10, the weather in Shandong was adjusted to "random mode". Sunny, rainy and foggy days alternate, and the temperature is hot and cold. In this case, there seems to be no special way except to wear long pants and take an umbrella.

Take 16 as an example. The sudden arrival of heavy fog caught many people off guard. /kloc-in the morning of 0/6, heavy fog appeared in northwest Shandong, and heavy fog with visibility less than 500 meters appeared in parts of Texas. Affected by this, the air quality in Binzhou, Dezhou and Liaocheng is moderately polluted, and the primary pollutants are PM2.5 in Dezhou, Jinan, Zibo, Weifang, Heze and Laiwu. The air quality in other areas is good, and the primary pollutants are PM 10, PM2.5 and O3. The northeast winds in the Bohai Sea, the Bohai Strait, the northern and central Yellow Sea are 6-7, and the gust is reduced from 8 to 5-6, with good visibility.

From the afternoon of 17 to the day of 18, the weather in southwestern Shandong and northwestern Shandong turned cloudy to light rain, and the weather in other areas turned cloudy to cloudy. In the north wind, the gust of 4 ~ 5 on the peninsula weakened to 3 ~ 4, and it was about 3 in other areas. The lowest temperature: around 1 1℃ in northwest Shandong, central Shandong and inland peninsula, and around 13℃ in other areas. In terms of the highest temperature, the province is generally around 18℃.

The Shandong Meteorological Observatory and the Provincial Environmental Information and Monitoring Center jointly predict that the air quality in the peninsula is mainly excellent-good, and the meteorological conditions of air pollution are secondary, which is more conducive to the dilution, diffusion and removal of air pollutants.

The air quality in central and eastern Shandong, northwest Shandong and southeast Shandong is mainly good-light pollution, and the meteorological conditions of air pollution are Grade III, which has no obvious influence on the dilution, diffusion and removal of air pollutants.

The air quality in central and western Shandong is mainly light pollution, and the meteorological condition of air pollution is Grade III, which has no obvious influence on the dilution, diffusion and removal of air pollutants.

The air quality in northwest and southwest Shandong is mainly light to moderate pollution, and the meteorological condition of air pollution is Grade III, which has no obvious influence on the dilution, diffusion and removal of air pollutants. (cold)