Group 1 - A strong cold air mass has begun its journey, marking the first cold wave of the second half of the year in China, with a wide impact range [1] - The Shanghai Central Meteorological Observatory forecasts that the cold air will start affecting Shanghai on Sunday night, leading to significant wind and temperature drops early next week [1] - From Tuesday to Saturday, the minimum temperatures in urban areas are expected to be between 4°C and 7°C, with even lower temperatures in suburban areas, accompanied by northerly winds [1] Group 2 - Overall, there will be a significant drop in temperatures next week, but it remains to be seen whether this will indicate the onset of winter [2]

Core Points - A significant cold wave is expected to impact various regions in China from November 14 to 17, with temperature drops of 6 to 10 degrees Celsius, and some areas experiencing drops of 12 to 14 degrees Celsius [3][4][5] Summary by Sections Weather Impact - The cold wave will primarily affect northern and central eastern regions, with specific areas like Inner Mongolia, Shaanxi, and parts of Jiangnan experiencing the most significant temperature drops [3][4] - Wind speeds are expected to reach 4 to 6 levels, with gusts up to 9 to 10 levels in certain localities [3][4] Snow and Rain Forecast - From November 14 to 15, regions including northern Xinjiang, eastern Inner Mongolia, and parts of Tibet are forecasted to receive light to moderate snow or sleet, with localized heavy snow [4][5] - From November 15 to 16, areas such as northeastern Inner Mongolia and northwestern Heilongjiang may see moderate to heavy snow, while regions like Hainan Island may experience heavy rain [5][7] Temperature Changes - By the morning of November 18, the zero-degree Celsius line is expected to move southward to areas including southern Jiangsu and northern Hubei [3] - Temperature drops of 4 to 8 degrees Celsius were recorded in regions like eastern Inner Mongolia and northern Heilongjiang [2][3]

Group 1 - The weather in Hangzhou is currently pleasant with temperatures reaching the 20s Celsius, and this comfortable weather is expected to last for the next three days before a significant cold front arrives [1][2] - A cold wave is anticipated to impact most of China from November 14 to 17, with temperatures expected to drop significantly, particularly in the eastern and southern regions [2] - In Zhejiang province, temperatures are projected to decrease by 9 to 11 degrees Celsius, with lows potentially reaching 0 degrees Celsius in mountainous areas by November 18 to 19 [2] Group 2 - The upcoming cold air mass will lead to strong winds along coastal and inland areas, which may exacerbate health issues such as joint pain and respiratory infections [3] - Residents are advised to dress warmly to prevent illness due to the expected drastic temperature drop [3]

Group 1 - The core viewpoint of the articles indicates that China will experience its first cold wave of the second half of the year from November 14 to 17, with significant temperature drops across northern and central eastern regions [1][2] - The temperature in northern and central eastern regions is expected to decrease by 6°C to 10°C, with some areas in Inner Mongolia, Shaanxi, and Chongqing experiencing drops of 12°C to 14°C [1] - The cold wave will also bring strong winds, and the lowest temperature line is projected to move south to southern Jiangsu and northern Hubei by the morning of November 18 [1] Group 2 - Monitoring shows that the average temperature across most of the country in November is 1°C to 3°C higher than the same period in previous years, with some areas in central Inner Mongolia and southern Qinghai exceeding 4°C [2] - The influence of cold air is expected to strengthen over the next 10 days, leading to a shift from above-average temperatures to below-average temperatures in most central eastern regions [2]

Core Points - China is set to experience its first cold wave of the second half of the year, with localized temperature drops reaching up to 14°C [1][2] - The cold wave is expected to affect northern and central eastern regions from November 14 to 17, with widespread temperature decreases of 6 to 10°C [1] - Specific areas such as northwestern Xinjiang, central and western Inner Mongolia, and parts of Jiangnan and Sichuan will see temperature drops of 12 to 14°C, accompanied by strong winds [1][2] Weather Impact - The cold air mass is notably strong, arriving after a period of relatively warm temperatures in the central eastern regions [2] - There is a risk of high flu incidence due to the cold wave and strong winds, prompting public health advisories for protective measures [2] - Potential adverse effects on transportation due to slippery and icy roads are highlighted, necessitating caution during travel [2]

Core Viewpoint - The article discusses the unpredictability of winter temperatures in China, highlighting that while this winter is expected to be warmer overall, significant fluctuations between cold and warm periods are anticipated [1][4]. Summary by Sections Winter Temperature Predictions - The classification of a winter as "cold" or "warm" is determined post-season based on average temperatures across various meteorological stations, with specific criteria for national, regional, and single-station assessments [2][3]. - The article notes that since the 1990s, China has experienced six cold winters, all occurring before 2012 [2]. Current Temperature Trends - Recent monitoring indicates that average temperatures in regions such as northern Xinjiang, Inner Mongolia, North China, Northeast China, Huanghuai, and Jianghan have been 1°C to 3°C lower than the same period in previous years, with some areas experiencing drops of 4°C to 5°C [3]. Influencing Factors - The article mentions that the current state of the equatorial eastern Pacific Ocean is cooler than usual, which may lead to a La Niña event, typically associated with lower temperatures in China during winter [4]. - However, the impact of global warming has led to instances of warmer winters even during La Niña years, indicating a complex interplay of factors affecting winter temperatures [4][6]. Extreme Weather Events - The article explains that despite the overall warming trend, extreme cold events can still occur due to changes in atmospheric circulation patterns, particularly the weakening of the westerly winds that usually contain polar air [5][6]. - This phenomenon suggests that global warming can coexist with severe cold spells, leading to more pronounced temperature fluctuations during winter [6].

Group 1 - The core viewpoint of the article is the continuation of a blue cold wave warning issued by the Hebei Meteorological Observatory due to significant temperature drops across the province [1] - The temperature in Shijiazhuang, Cangzhou, and northern regions has decreased by 5 to 8 degrees Celsius compared to the morning of October 16, with some areas like Zhangjiakou, Chengde, and the northwestern part of Baoding experiencing drops of 8 to 12 degrees Celsius, and localized areas exceeding 14 degrees Celsius [1] - Other regions have seen a temperature decline of 2 to 4 degrees Celsius, with further decreases expected on the morning of October 19 in northern Zhangjiakou, Xingtai, and Handan by 2 to 5 degrees Celsius, and frost anticipated in Baoding and northern Langfang [1]

Core Points - A strong cold air mass is expected to impact China from October 16 to 21, leading to the lowest temperatures of the second half of the year in most regions [1][3] - Beijing is forecasted to experience a significant drop in temperature, with nighttime temperatures falling to single digits starting from October 17, and potentially reaching around 2°C on the night of October 19 [1][3] - This cold air mass is considered the strongest of the second half of the year, with a prolonged impact and significant temperature drops [5] Summary by Sections Weather Forecast - The cold air mass is expected to lead to continuous average daily temperatures below 10°C in Beijing from October 18 to 24, indicating an early onset of winter [3] - The average winter onset date for Beijing is typically October 31, based on historical data from 1991 to 2020 [3] Temperature Impact - Northern regions will experience persistently low temperatures, with areas like North China and eastern Huanghuai expected to have average temperatures below 10°C for five consecutive days starting October 18 [5] - Initial frost is anticipated in northern China, including regions like Liaoning [5] Weather Warnings - Beijing's meteorological authority has issued blue alerts for cold waves and strong winds, warning of temperature drops of around 8°C and nighttime lows of about 4°C in plain areas [5] - Frost warnings have been issued for several districts, indicating potential agricultural impacts due to low temperatures [5] Health Advisory - The Beijing Center for Disease Control advises the public to take precautions against the cold, including wearing appropriate clothing and maintaining good hygiene practices to prevent respiratory illnesses during the flu season [6]

Core Points - Liaoning province is experiencing the coldest daytime temperatures since the beginning of autumn, with some areas seeing maximum temperatures drop to single digits [1] - The province officially entered meteorological winter on October 17, three days earlier than the average date of October 20 [1] Summary by Sections Weather Conditions - A strong cold air mass began affecting Liaoning on the night of October 16, leading to significant temperature drops [1] - From October 17 to 18, the eastern and northwestern regions of Liaoning are expected to see minimum temperatures decrease by 8 to 10 degrees Celsius, with localized drops reaching 10 to 14 degrees Celsius [1][2] - Most areas will experience temperature declines of 4 to 8 degrees Celsius [1] Temperature Forecast - On October 17, the majority of Liaoning will be under cloudy and rainy conditions, with maximum temperatures in cities like Shenyang, Tieling, and Fuxin falling to between 7 and 9 degrees Celsius [1] - The lowest temperatures of this cold wave are anticipated on the morning of October 19 to 20, with mountainous areas reaching -8 to -5 degrees Celsius, while other regions will generally be between -4 and 0 degrees Celsius [2] Weather Alerts - The Liaoning Meteorological Observatory issued blue alerts for cold waves and frost, indicating the potential for ground temperatures to fall below 0 degrees Celsius, leading to frost [2] - Strong winds are expected, with land-based north winds reaching 4 to 6 levels, and gusts up to 7 to 8 levels [2]

Core Viewpoint - A strong cold air mass is expected to significantly lower temperatures across China, with Beijing likely to experience its earliest winter onset in years, potentially starting on October 18, 2023 [4][8]. Summary by Sections Weather Impact - The cold air mass will affect most regions of China, bringing the lowest temperatures since the second half of 2023, with Beijing's temperatures expected to drop to single digits starting from October 17 [2][6]. - Continuous average temperatures below 10°C are forecasted for Beijing from October 18 to 24, indicating a high probability of winter onset [4][8]. Temperature Predictions - The average temperature in northern regions, including Beijing, is expected to remain below 10°C for at least five consecutive days starting October 18, which meets the criteria for winter [6][8]. - Initial frost conditions are anticipated in northern areas, including parts of Liaoning, during this period [6][8]. Weather Warnings - The Beijing Meteorological Station has issued blue alerts for cold waves and strong winds, predicting a temperature drop of around 8°C from October 16 to 18 [8]. - Specific regions in Beijing are under frost warnings, indicating potential agricultural impacts due to low temperatures [8]. Health Advisory - The Beijing Center for Disease Control advises residents to take precautions against the cold, including wearing appropriate clothing and maintaining hygiene to prevent respiratory illnesses during the flu season [9].