The following are the main characteristics of the atmospheric general circulation in February 2010. There are three polar vortex centers: the Asian polar vortex center is stronger than normal years, the East Asia major trough is weak, and the south branch trough is active in the first ten days of February. This circulation situation causes the north branch frontal zone to be weaker than normal years. The main climatological characteristics in February are as follows. The temperature is higher than normal years. The rainfall in Xinjiang and Zhejiang is more than the other years. The drought in Yunnan, Guizhou, Sichuan and Guangxi becomes more serious。Meanwhile， because of the influence of cold waves during 8-13 February, there are many rainy and snowy days over the large area of China before the Spring Festival of 2010, and it gives high impacts on the traffic in this period.