Core Points - Beijing Meteorological Station issued a blue alert for cold wave due to strong cold air, predicting a temperature drop of around 8°C from the night of October 16 to the night of October 18, with minimum temperatures in the plains expected to reach around 4°C [1] - A blue alert for strong winds was also issued, forecasting north winds of 3 to 4 levels in most areas of Beijing from noon to night on October 17, with gusts in certain districts reaching around 7 levels [1] - On October 16, the weather was overcast with light rain, and the maximum temperature was around 15°C, with significant rainfall expected during the night [1] Weather Alerts - During the strong wind warning, it is advised to enhance outdoor activity safety management and suspend organized outdoor activities such as climbing, hiking, and cycling [2] - Public should pay attention to travel safety and avoid tall buildings and temporary structures during the wind alert [2] - During the cold wave alert, it is recommended for the public to dress warmly to prevent colds and cardiovascular diseases [2]

Core Viewpoint - A strong cold air mass is affecting Beijing, leading to an early onset of winter, with temperatures expected to drop significantly starting October 17, 2023 [2][4][6]. Summary by Sections Weather Forecast - The cold air mass is the most extensive and intense affecting China this year, with temperatures expected to drop by 4°C to 8°C across most regions from October 15 to 19, 2023 [2][4]. - Beijing is predicted to experience a significant temperature drop, with nighttime temperatures falling to around 4°C from October 17 to 18, 2023 [4][6]. Winter Onset Criteria - According to national standards, winter is defined as the first occurrence of a continuous 5-day sliding average temperature below 10°C [7]. - Historically, the average winter onset date for Beijing from 1991 to 2020 was October 31, but this year it is expected to be significantly earlier, around October 18, 2023 [7][8]. Historical Context - The earliest recorded winter onset in Beijing was October 16, 2021, with the potential for this year to tie for the fourth earliest winter onset [8]. Health Implications - The drop in temperature can lead to various health risks, including respiratory issues, cardiovascular diseases, and exacerbation of chronic conditions [9][10][11]. - Recommendations for health management during this cold spell include maintaining warmth, hydration, regular health monitoring, moderate exercise, and a consistent sleep schedule [12][13][14][15].

Group 1 - The recent cold wave has significantly impacted temperatures across Zhejiang, with the highest temperature in Hangzhou only reaching 11.2℃ and some areas experiencing single-digit highs [1] - The weather is expected to improve starting Monday, with temperatures gradually rising above 20℃ by Tuesday, allowing for outdoor activities [1] - Despite the warming trend, early morning temperatures will remain low, with minimums in the plains at 4-8℃ and in mountainous areas at 2-4℃, leading to a temperature difference of up to 15℃ between morning and afternoon [1] Group 2 - The recent temperature drop does not qualify as "late spring cold" according to Zhejiang's definition, which requires a sustained period of low average temperatures after early April [1] - Predictions indicate a shift in weather patterns around the Qingming Festival, with warmer air masses gaining dominance and a reduction in the likelihood of significant cold waves in the near future [2] - The upcoming weather is expected to feature more frequent warm temperatures in the north and increased rainfall in the south, although some cooling may still occur [2] Group 3 - As the weather improves, there is an increased fire risk, particularly with the approach of the Qingming Festival, highlighting the need for caution regarding fire and electrical safety [3]

Core Points - A significant temperature drop is expected across multiple regions in China following a period of warming, with forecasts indicating a decrease of 8°C to 14°C, and in some areas, over 20°C [1][2] - The cold wave is predicted to impact various regions including Xinjiang, Inner Mongolia, Heilongjiang, and parts of southern China, with the lowest temperatures expected on the night of March 29 to the early morning of March 30 [1][2] Summary by Sections - **Temperature Changes**: The Central Meteorological Observatory has issued warnings for cold waves, strong winds, fog, and sandstorms, forecasting a drastic temperature drop across northern and southern regions of China [1] - **Public Advisory**: Meteorological experts advise the public to adjust their clothing according to the fluctuating temperatures and to be cautious of strong winds and potential hazards from falling objects in northern areas, while southern regions should be aware of severe convective weather [2]

Group 1 - The cold wave is expected to impact most regions of China from March 25 to 29, with temperature drops of 8 to 12°C nationwide, and some areas experiencing drops of 14 to 16°C, with local maximum temperature drops exceeding 20°C [2][3] - The cold wave will bring strong winds and dust storms to northern regions, with wind speeds reaching 4 to 6 levels, and gusts in some areas reaching 10 to 11 levels [3] - Areas south of the Huai River will experience strong convective weather, including light to moderate rain or thunderstorms, with localized heavy rain expected [4] Group 2 - The cold wave will lead to significant temperature fluctuations, with the minimum temperature line expected to be at 0°C in central North China to southern Shaanxi by the morning of March 30 [2] - Dust storms are anticipated in regions such as eastern and southern Xinjiang, central and western Inner Mongolia, and western Gansu, with some areas experiencing sandstorms [3] - Meteorological experts warn of health risks due to the cold wave and dust storms, advising the public to take precautions against respiratory diseases and to be cautious of low visibility affecting transportation [5]