（原标题：大雪、暴雪，要来了！） 来源：中央气象台 11月22日早上，中央气象台发布最新天气公报： 新一股冷空气将影响我国大部地区 摘要： 国内方面，昨日，新疆青海四川等地出现降雪，西南地区出现阴雨天气。预计23日至25日，较强冷空气 将影响我国大部地区，新疆北部、西北地区、华北北部及东北地区等地有小到中雪，新疆北部部分地区 有大雪，局地暴雪，关注大风、降温、雨雪天气对设施安全、能源供应、人体健康、交通运输等的影 响。 全球方面，昨日，越南、马来半岛、新西兰出现强降雨；东欧和远东地区出现强降雪。预计，未来三 天，马来半岛北部、苏门答腊岛西北部沿海有强降雨；欧洲将出现大范围强降雪；热带气旋"菲纳"持续 影响澳大利亚北部。 一、国内天气情况 1.实况 昨日新疆青海四川等地出现降雪，西南地区出现阴雨天气 昨日8时至今日6时，新疆北部、青海南部、川西高原北部、黑龙江西北部、内蒙古东北部等地出现小到 中雪或雨夹雪，四川甘孜等局地大雪；云南、四川南部等地出现小雨。 2.重点天气预报 新一股冷空气将影响我国大部地区 11月22日至25日，一股较强冷空气将自西向东影响我国大部地区，将带来北方6～8℃、南方4～6℃降 温，北方 ...

来源：中央气象台 11月22日早上，中央气象台发布最新天气公报： 新一股冷空气将影响我国大部地区 摘要： 国内方面， 昨日， 新疆青海四川等地出现降雪，西南地区出现阴雨天气。预计23日至25日，较强 冷空气将影响我国大部地区， 新疆北部、西北地区、华北北部及东北地区等地有小到中雪，新疆 北部部分地区有大雪，局地暴雪， 关注大风、降温、雨雪天气对设施安全、能源供应、人体健 康、交通运输等的影响。 全球方面， 昨日， 越南、马来半岛、新西兰出现强降雨； 东欧和远东地区出现强降雪。预计，未 来三天， 马来半岛北部、苏门答腊岛西北部沿海有强降雨；欧洲将出现大范围强降雪； 热带气旋 "菲纳"持续影响澳大利亚北部。 一、国内天气情况 1.实况 昨日新疆青海四川等地出现降雪，西南地区出现阴雨天气 昨日8时至今日6时，新疆北部、青海南部、川西高原北部、黑龙江西北部、内蒙古东北部等地出 现小到中雪或雨夹雪，四川甘孜等局地大雪；云南、四川南部等地出现小雨。 2.重点天气预报 新一股冷空气将影响我国大部地区 11月 22日至25日 ， 一股较强冷空气将自西向东影响我国大部地区，将带来北方6～8℃、南方4 ～ 6 ℃ 降温， 北方 ...

Core Points - The prolonged high temperatures in Zhejiang have been recorded until mid-October, with the latest high temperature day occurring on October 11, marking a historical record [1] - A series of cold air masses are expected to influence the weather in Hangzhou, leading to a significant drop in temperatures and the end of the high-temperature period [1][2] Summary by Sections Weather Patterns - The high temperatures have persisted due to the reluctance of the subtropical high-pressure system to retreat, with significant temperature variations across different regions [1] - The arrival of cold air is expected to lower temperatures significantly, with the main urban area experiencing a maximum temperature of around 28°C [1][2] Cold Air Impact - The first two cold air masses are not strong enough to end the warm weather, but the third cold air mass arriving on October 18 is anticipated to bring more substantial cooling and precipitation [2] - The forecast indicates that by October 19, the minimum temperature in the main urban area will drop below 20°C, with maximum temperatures not exceeding 25°C [2] Tropical Cyclone Activity - Concurrently, there is potential tropical cyclone activity in the Northwest Pacific, with a possibility of a new typhoon forming around October 17 [2] - The interaction between the cold air and the subtropical high-pressure system may affect the trajectory and intensity of the developing cyclone, with potential impacts on weather conditions in Hangzhou [2]

Group 1 - Tropical cyclones are classified into six categories based on maximum wind speed, including tropical depression, tropical storm, severe tropical storm, typhoon, severe typhoon, and super typhoon [1] - The maximum average wind speed for each category ranges from 10.8-17.1 m/s for tropical depression to over 51.0 m/s for super typhoon [1] - The formation of tropical cyclones requires several necessary conditions, including warm ocean waters, a moist middle troposphere, low vertical wind shear, sufficient Coriolis force, and an initial low-pressure disturbance [1] Group 2 - Tropical cyclones are most common during the summer and autumn seasons and have a lifecycle that can be divided into four stages: formation, development, maturity, and dissipation [2] - Mature tropical cyclones exhibit structures such as an eye, eyewall, and spiral rainbands, with diameters ranging from 100 km to 2000 km [2] - While tropical cyclones that do not make landfall can persist over the ocean for extended periods, those that do land typically weaken rapidly but may still cause significant rainfall and natural disasters due to residual low-pressure systems [2]

Core Viewpoint - Typhoon "Jianyu" has intensified to a strong typhoon level, impacting Hainan with severe wind and rain, prompting multiple cities and counties to initiate emergency responses to mitigate risks such as flooding and geological disasters [1][3]. Group 1: Typhoon Characteristics - Typhoon "Jianyu" is characterized by its rapid movement, with expectations of it passing near the coast from Sanya to Ledong in the evening to night of the 24th [1]. - The typhoon's path resembles that of summer typhoons, influenced by the subtropical high pressure, moving predominantly westward [5]. - The central meteorological authority indicates that the main circulation of the typhoon will increasingly affect the southern coastal areas of Hainan, with significant rainfall expected [3][5]. Group 2: Historical Context and Impact - Historically, August is an active period for tropical cyclones in Hainan, but landfall events are relatively rare; strong typhoons are even less common [7]. - If "Jianyu" makes landfall in Sanya as a strong typhoon (42 m/s), it could become the strongest typhoon to hit the area in nearly 40 years, approaching historical intensity records [9].

Core Insights - The Philippines has experienced significant devastation due to multiple tropical cyclones, resulting in 30 fatalities and over 5.29 million people affected [1] - Agricultural losses are reported to exceed 760 million pesos (approximately 95 million RMB), while infrastructure damages surpass 5 billion pesos (around 620 million RMB) [1] - A total of 154 municipalities across the country have declared a state of disaster [1]

Core Points - The Philippines has been severely impacted by multiple tropical cyclones, resulting in 19 deaths and over 333 million people affected as of July 24 [1] - Agricultural losses are estimated to exceed 640 million pesos, approximately 80 million RMB, while infrastructure damages are over 3.9 billion pesos, around 490 million RMB [1] Summary by Category Human Impact - 19 fatalities reported and 11 individuals missing due to the effects of Typhoon "Wipa," Typhoon "Vansha," Typhoon "Bamboo," and the southwest monsoon [1] Economic Impact - Agricultural losses amount to over 640 million pesos (approximately 80 million RMB) [1] - Infrastructure damages exceed 3.9 billion pesos (around 490 million RMB) [1] Affected Population - More than 333 million people have been affected by the weather systems [1]

Core Insights - The 2025 flood season in Hainan is projected to last from May 15 to November 15, with the first tropical cyclone expected around mid-June [1] - A total of 6 to 8 tropical cyclones are anticipated to affect Hainan during the flood season, with 4 to 5 impacting Hainan Island and 1 to 2 making landfall [1] - The last tropical cyclone affecting Hainan is expected to occur in mid-December, with the overall intensity of cyclones close to the historical average [1] Weather Trends and Preparedness - The average temperature during the flood season is expected to be higher than usual, with potential for phase-specific high-temperature droughts [2] - Increased focus on safety measures and public awareness regarding severe convective weather is necessary due to its frequency and potential for damage [2] - The risk of typhoons and regional heavy rainfall is anticipated to be slightly higher than in 2023 and the historical average, necessitating early preventive measures [2]