南北方此轮回暖不寻常，本周末强冷空气来袭

Core Viewpoint - The recent weather in China has been characterized by warming and dryness, with significant temperature increases expected in various regions, creating an unusual early spring-like atmosphere [1][3]. Temperature Trends - The highest temperature line of 15°C is expected to extend northward to southern Hebei, while the 20°C line will rise to southern Henan and central Jiangsu, with many areas in the northwest to south China experiencing above-normal temperatures, particularly in the Huanghuai to Jiangnan regions, where the maximum temperature may exceed 10°C [3][6]. - Specific cities like Hefei, Nanjing, Hangzhou, Changsha, and Nanchang are forecasted to reach maximum temperatures of 20°C, 20°C, 22°C, 22°C, and 21°C respectively, indicating a significant deviation from typical January temperatures [3][5]. Weather Conditions - The upcoming days are expected to have plenty of sunshine with little rain or snow across most of the country, contributing to the warming trend [6]. - Despite the daytime warming, there will be significant temperature differences between day and night, with some areas experiencing temperature variations exceeding 15°C [7]. Cold Air Influence - A strong cold air mass is anticipated to impact most of China starting this weekend, leading to much colder conditions in the northeast, with minimum temperatures dropping below -30°C in some areas [10]. - The cold air is expected to move southward gradually rather than in a sudden burst, indicating a prolonged period of colder weather following the recent warmth [10]. Future Weather Patterns - The current dry weather pattern in the central and eastern regions is likely to change as active warm and moist air flows may lead to widespread rain and snow events [10]. - Historical data indicates that the first typhoon of the year typically forms around March 25, but there have been instances of January typhoons, with the earliest recorded in 2019 [12].