Core Viewpoint - Jiangsu province is experiencing a significant temperature fluctuation, with a warm spell followed by a strong cold front bringing rain, snow, and a notable drop in temperatures [1][2]. Weather Forecast Summary - From February 3 to February 4, the weather will be mostly cloudy to clear, with maximum temperatures reaching 16-17°C in southern Jiangsu and around 13°C in northern Jiangsu [3]. - From February 4 to February 5, southern Jiangsu will see cloudy conditions with occasional light rain, while other areas remain mostly clear. Maximum temperatures will be around 16-17°C in most regions [4]. - From February 5 to February 6, a cold front will bring rain and snow, with maximum temperatures dropping to 4-5°C in northeastern Jiangsu and around 12°C in southern regions. Minimum temperatures may fall below freezing, reaching -1 to -2°C in some areas [5]. Climate Trends and Impacts - The current warm temperatures are attributed to a "warming effect" before the arrival of a strong cold front, which is expected to cause a temperature drop of over 10°C within 48 hours [1]. - Meteorological experts indicate that due to prior warming and the nature of the upcoming snow, significant accumulation is unlikely, and melting will occur quickly [2]. - The Jiangsu Climate Center reports that during the Spring Festival travel period, temperatures will be above average, with potential for localized low-temperature rain and snow events, but widespread severe weather is not anticipated [2].

Core Viewpoint - The weather in Zhejiang has been unusually warm and dry since October, with a significant drop in temperature expected due to an incoming cold front [1][2] Summary by Sections Temperature Trends - The highest temperature in Hangzhou reached 19.3℃, with some areas exceeding 20℃, marking a warm December [1] - Since October, the average temperature in Zhejiang has been 17.8℃, which is 2℃ higher than the historical average, and in December, it has been 11.8℃, also 2.2℃ above the norm [1] Precipitation Patterns - From October, the total rainfall in Zhejiang was 104mm, which is 38% less than the historical average, and in December, only 1mm of rain was recorded, a 97% decrease compared to the norm [1] Upcoming Weather Changes - A strong cold front is expected to arrive, bringing significant temperature drops, strong winds, and widespread light rain [1] - The cold front will impact the region from late Friday to Saturday, with temperatures expected to drop to 2-3℃ in urban areas and 0-3℃ in mountainous regions, potentially causing frost and ice [1] Short-term Weather Forecast - On Friday morning, humidity will increase with localized light rain expected, transitioning to cloudy conditions as the cold front weakens [2] - After the rain, warmer weather will return, with daytime temperatures gradually rising, although early morning temperatures will remain low, leading to significant temperature fluctuations [2]

Group 1 - A weak cold air mass has arrived, causing a drop in temperature in Hangzhou, with the highest temperature on Monday (December 8) recorded at 15.8℃, down from the "20s" over the weekend [1] - The air quality in Hangzhou deteriorated significantly due to the increase in PM2.5 levels, with the AQI reaching moderate pollution levels between 9-10 AM [1] - The cold air mass is not strong, and temperatures are expected to rebound significantly starting Wednesday, with highs reaching around 20℃ in northern Zhejiang and 22℃ in central and southern regions by Thursday [1] Group 2 - A significant drop in temperature is expected from Friday night to Saturday (December 12-13) due to another cold air mass, with temperature decreases of 6℃-8℃ and strong winds [2] - Rain is forecasted for Saturday, contributing to a "wet and cold" feeling across the Jiangsu-Zhejiang-Shanghai region [2] - The lowest temperatures next week are expected to drop to around 0℃ in most areas, with mountainous regions experiencing temperatures between -2℃ and -4℃ [2]

Core Points - The article discusses the fluctuating temperatures in Hangzhou due to the influence of weak cold air and the strengthening of the subtropical high pressure [1][2] - A significant drop in temperature is expected starting Saturday, marking a transition to autumn with lower daytime highs and increased rainfall [2] Group 1: Temperature Fluctuations - On Tuesday, the maximum temperature in Hangzhou was only 24.6℃, but it rose to 32.4℃ on Wednesday as the weak cold air influence ended [1] - The upcoming days will see temperatures oscillate between the effects of cold air and subtropical high pressure, with a notable rise before the arrival of a stronger cold front [1] Group 2: Upcoming Weather Changes - Starting Saturday, a strong cold air mass will lead to a significant drop in temperatures, with nighttime lows expected to reach the teens and daytime highs only between 22-23℃ [2] - The period from 18-19 will bring not only cooler temperatures but also increased rainfall, including possible thunderstorms, enhancing the cooling effect [2]