今年首场大寒潮将至 成都最高气温降幅超10℃

Core Viewpoint - Chengdu is experiencing an unusually warm winter during the "Three Nine" period, with temperatures significantly higher than historical averages, attributed to specific weather patterns and the influence of high-pressure systems [1][2]. Group 1: Current Weather Conditions - As of January 16, Chengdu's average temperature during the "Three Nine" period is 6.6℃, which is 0.9℃ higher than the historical average, with a daily maximum temperature average of 14.7℃, exceeding the historical average by 5.6℃, marking the second highest in nearly 50 years [1]. - The city has recorded a total of 49.9 hours of sunshine during this period, which is approximately three times more than the historical average [1]. Group 2: Upcoming Weather Changes - A significant cold wave is expected to impact Chengdu starting on the evening of January 18, with temperatures projected to drop by 6-8℃ from current levels, bringing maximum temperatures down to around 7℃ by January 21 [3]. - The cold front will also bring 3-5 level north winds and light rain, with potential for mixed rain and snow in western mountainous areas, along with risks of road icing [3]. Group 3: Meteorological Insights - The warm weather in Chengdu is primarily due to the influence of a high-pressure system that has led to sustained clear weather and increased solar radiation, while cold air paths have shifted north and east, minimizing their impact on Sichuan [2]. - The upcoming cold wave is expected to be characterized by rapid temperature drops, significant temperature declines, and a wide area of impact, prompting advisories for residents to prepare for colder conditions [3].