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CMA released weather and climate features of winter in 2018/2019

04-03-2019Source:China Meteorological News Press

On February 28, the China Meteorological Administration(CMA) released the China’s weather and climate features in winter of 2018/2019, which showed that the average temperature was near to the normal years, the precipitation was more than normal, and 10 cold air processes hit China.

Average Temperature

During November 1 of 2018 to February 27 of 2019, the average temperature was -3.2℃, near to the same period of normal years (-3.4 °C). In central-western Inner Mongolia, central-eastern Xinjiang, northern Gansu, central Hunan and eastern Guizhou, the temperature was 1-2℃ lower, with 2-4℃ lower in local areas. The temperature of Heilongjiang, Jilin, eastern Yunnan, southeastern Fujian and Hainan was 2-4℃ higher.

In the winter, the daily temperature dropping range in 63 stations reached extreme event standard, with 9 stations mainly distributed in Heilongjiang, Inner Mongolia, Hebei, Sichuan, Yunnan, Tibet breaking the historical extreme. The daily minimum temperature in 68 stations reached extreme event standard. 5 stations including Gyangze of Tibet (-25.2°C) broke the historical extreme.

Precipitation

In winter, the average precipitation (55 mm) was 37.2% more than the same period of normal years(40.1 mm). In Northeast China, North China, eastern South China, eastern Inner Mongolia, central Xinjiang, the precipitation was 20% to 80% less than normal. The central Northwest China, southern Yellow-Huaihe basin, the Yangtze-Huaihe basin, central-eastern South of the Yangtze River, Tibet, southern Yunnan and northwestern Sichuan had the precipitation of 50% to 2 times more than normal.

Continuous dry days of 173 stations reached the extreme event standard. Among them, 25 stations such as Tianjin Climate Station (131 days) broke the historical extremes.

Cold air

10 cold air processes affecting China respectively were December 3-6 of 2018, December 23-24 of 2018, December 27-30 of 2018, January 15-17 of 2019, January 20-22 of 2019, January 26-27 of 2019, January 31 to February 1 of 2019, February 4-5 of 2019, February 7-11 of 2019, February 15-16 of 2019 , which near to the normal year (10.7 times).

The cold air process on December 27-30, 2018 had a long duration, a large range of influence, strong extreme temperature, and obvious freezing and snow freezing process. 60.9% of the country was affected, and the impact range was the largest in winter. The temperature of southeastern Yellow-Huaihe basin, the Yangtze-Huaihe basin and southeastern Guangdong dropped over 12℃. Daily lowest temperature of northeastern Inner Mongolia reached -40℃. The 0℃ temperature line moved over south to reach northern South China and northern Yunnan, which was the southernmost in winter. Heavy snow occurred in central-northern Hunan, southern Hubei, northwestern Jiangxi, and eastern Guizhou. 332 weather stations including Hunan, Guizhou, Jiangxi, Guangxi and Yunnan experienced freezing weather.  

Reporter Zhang Minglu

Editor Hao Jing