天气大反转！大雾过后紧接寒潮雨雪冰冻

Core Viewpoint - A significant cold wave is expected to impact various regions in China, with temperatures dropping sharply and severe weather conditions including rain, snow, and ice forecasted [1][15]. Group 1: Weather Forecast - The Central Meteorological Administration has issued a blue alert for a cold wave, predicting the strongest rain, snow, and freezing weather since the start of winter across central and eastern regions [1]. - Temperatures are expected to plummet by 15°C to 20°C within 1 to 2 days, transitioning from mild to extremely cold conditions [1]. - In Guangxi, a strong cold air mass will lead to a significant drop in temperatures, with forecasts indicating minimum temperatures in high-altitude areas dropping to between -5°C and 1°C [7][14]. Group 2: Visibility and Safety Alerts - A fog warning has been issued for several cities in Guangxi, with visibility expected to drop below 1000 meters in some areas, and below 200 meters in localized regions [3][12]. - The cold wave and associated weather conditions are likely to adversely affect transportation, prompting safety advisories for travel and outdoor activities [17]. Group 3: Temperature Predictions - The forecast indicates that from January 19 to January 22, temperatures will drop significantly, with minimum temperatures across Guangxi expected to fall below 10°C in most areas [15]. - Specific temperature ranges include -7°C to -1°C in high-altitude regions, and 1°C to 8°C in northeastern Guangxi [10][14].