冷暖大反转！下周二起广东将迎来冷空气，粤北山区或有雨夹雪

Core Viewpoint - A cold wave is expected to impact central and eastern China from January 18 to 21, bringing widespread rain and snow, with significant temperature drops in Guangdong province [1][3]. Weather Forecast Summary - From January 18, the weather in Guangdong will vary, with some areas experiencing cloudy conditions and light rain, while others will be mostly sunny [4][5]. - The cold air mass is forecasted to reach northern Guangdong by the morning of January 20 and the southern coastal areas by night, with the 0°C line expected to drop to northern Guangdong [3]. - The average temperature drop is projected to be 7 to 10°C in northern Guangdong, 5 to 7°C in central areas, and 3 to 5°C in southern coastal regions [3]. - The lowest temperatures are anticipated around January 22, with northern high-altitude areas experiencing temperatures between -4°C and 0°C, and Guangzhou expected to see a low of around 7°C [3]. Specific Weather Conditions - On January 18, areas like Shaoguan, Qingyuan, and Zhaoqing will have cloudy to overcast skies with light rain, while most other areas will be sunny to partly cloudy [4]. - On January 19, most of Guangdong will be sunny to partly cloudy, with morning fog in many areas [5]. - From January 21 to 22, Shaoguan and Qingyuan will have overcast skies with light rain, and high-altitude areas may see sleet or freezing rain [5]. Wind and Chill Effects - A wind advisory indicates that from January 20 to 21, northern and central Guangdong will experience north winds with gusts of 5 to 7 levels, while the sea will see winds of 6 to 8 levels with gusts up to 9 levels [5]. - The wind chill effect will further lower the perceived temperature, prompting the need for warm clothing [5].