Core Viewpoint - The recent drought situation in China has reached critical levels, with significant areas affected, but recent rainfall has alleviated conditions in some regions [1][6][7]. Summary by Relevant Sections Drought Conditions - As of April 18, the area affected by moderate drought and above reached 2.018 million square kilometers, with severe drought covering 477,000 square kilometers, marking a peak in the current phase [1][6]. - The main drought-affected areas are located in the eastern part of the northwest region and the northwestern part of central China, with moderate to severe drought reported in parts of southern regions such as northeastern Sichuan and northern Chongqing [8]. Weather Patterns - In May, the average national precipitation was 63.4 millimeters, which is 3.8% more than the same period in previous years. However, precipitation distribution was uneven, with some areas experiencing up to double the normal levels [9]. - The northern drought areas are expected to see some relief due to forecasted rainfall from May 29 to June 1, with predictions of light to moderate rain in regions like southern Gansu and most of Shaanxi [7]. Upcoming Weather Forecast - During the upcoming Dragon Boat Festival (May 31 to June 2), significant rainfall is expected across central and eastern regions, including strong rain in areas such as eastern Hubei and southern Jiangnan, which may pose risks for travel [9].

Summary of Key Points Core Viewpoint - The National Climate Center reported that May 2023 experienced higher temperatures and uneven rainfall across China, with significant weather events impacting various regions, including droughts and extreme heat conditions. Temperature Characteristics - The average national temperature in May was 17.1°C, which is 0.9°C higher than the same period in previous years. Most regions experienced temperatures close to or above historical averages, with some areas in Central and Western China exceeding by 2-4°C. Notably, Henan and Shaanxi recorded their highest average temperatures since 1961, with 287 weather stations reporting record high temperatures for spring [1]. Rainfall Patterns - The national average precipitation was 63.4 mm, which is 3.8% more than the historical average. Certain regions, including parts of Northeast China and Southern China, saw rainfall increase by 20% to 200%, while other areas experienced a decrease of 20% to 90%. Beijing recorded its highest rainfall for this period since 1961, with significant records also in Tibet and Guizhou [2]. Drought Conditions - Drought conditions developed in regions such as Shaanxi, Gansu, and Henan, despite earlier rainfall alleviating drought in Southern China. Currently, areas in Northwest China and Central China are experiencing moderate to severe drought, impacting agriculture and local livelihoods [2]. Extreme Weather Events - The first heatwave of the year occurred from May 19-21, affecting several regions, with extreme temperatures recorded at 43.2°C in Linzhou, Henan. This heatwave, combined with dry winds, adversely affected wheat development [3]. Severe Weather Incidents - There were six instances of severe convective weather and four dust storm events throughout May, surpassing the historical average of 2.7 occurrences from 2000 to 2024. The dust storm on May 8-9 reached severe levels, impacting air quality and visibility [3].

Group 1 - The average proportion of days with good air quality in 339 cities in China was 83.1% in April, a year-on-year decrease of 6.7 percentage points [1] - From January to April, there were 2060 days of sandstorm exceedance, an increase of 497 days compared to the previous year [1] - The main reasons for the increased sandstorm frequency include reduced precipitation, higher temperatures, and strong winds [1] Group 2 - The average concentration of PM10 in April was 56 micrograms per cubic meter, a year-on-year increase of 5.7% [1] - The proportion of days with severe pollution was 2.1% in April, an increase of 0.9 percentage points year-on-year [1] - It is expected that after June, the risk of sandstorms will significantly decrease due to increased rainfall and vegetation growth [2]

Group 1 - The core viewpoint is that the frequency of sandstorm weather in the northwest region of China has increased, with some areas even experiencing sandstorms in summer, which is considered an abnormal weather condition [1][2] - Sandstorm weather typically occurs in arid and semi-arid regions, requiring three conditions: the presence of ground dust material, strong wind dynamics, and an unstable atmospheric environment [1] - The current increase in sandstorm events is attributed to the active phase of Mongolian cyclones, increased cold air activity, and insufficient precipitation in the northwest region, leading to dry soil and abundant dust material [1][2] Group 2 - The rise in sandstorm occurrences during summer is linked to rapid temperature increases and low moisture content in the atmosphere, which can lead to dry convection and the development of strong sandstorms [2] - Global climate change is contributing to increased saturation vapor pressure in the atmosphere, resulting in prolonged dry spells or heavy rainfall events, both of which heighten the likelihood of sandstorm occurrences [2] - The adverse effects of frequent sandstorms on daily life and production necessitate public awareness and preventive measures, including monitoring weather changes and adhering to health advisories [3]

Group 1 - A new round of heavy rainfall is occurring in southern China, with the strongest period expected today and tomorrow [1][2] - The Central Meteorological Administration has issued a Level IV emergency response for drought and a Level III emergency response for heavy rain and severe convective weather [1] - Areas such as Hunan, Guangxi, and Guangdong have already experienced heavy rain, with localities facing extreme rainfall [2] Group 2 - Specific regions expected to experience heavy rain include parts of Jianghuai, Jianghan, Jiangnan, and northern South China, with some areas forecasted to have extreme rainfall [2] - Strong convective weather is anticipated, including short-term heavy rainfall, thunderstorms above level 8, and hail, with wind gusts potentially exceeding level 11 in certain areas [2] - Following this period, rainfall intensity is expected to decrease significantly, with moderate to heavy rain forecasted for eastern Jiangnan and South China [2] Group 3 - Cold air is expected to cause a temperature drop of 4-8°C in the eastern Northwest region, Inner Mongolia, and North China, with wind speeds reaching 4-6 levels and gusts up to 10 levels [3] - A blue warning for strong winds is currently in effect, with specific regions experiencing sandstorm conditions [3] - The forecast indicates strong winds in various areas, including the Yellow Sea and East China Sea, with gusts potentially reaching level 10 [3]

Summary of Key Points Core Viewpoint - Southern China is expected to experience a new round of heavy rainfall, while northern regions will see precipitation and temperature drops due to cold air moving in [1][2][5]. Group 1: Southern China Weather Forecast - From May 7 to 9, southern regions will face significant rainfall, with areas in the southwest, Jiangnan, and much of South China experiencing heavy to torrential rain [2][5]. - The strongest rainfall is anticipated on May 8, driven by warm moist air and cold air moving south, particularly affecting regions like southern Anhui, eastern and southern Hunan, and northern Guangxi [5]. Group 2: Northern China Weather Forecast - Northern regions will see a west-to-east progression of precipitation, with temperatures dropping by 4 to 8 degrees Celsius and wind speeds reaching 4 to 6 levels, with gusts potentially exceeding 10 levels [6]. - Following the cold air impact, a significant temperature rise is expected in mid-May, with northern areas likely to experience summer-like conditions, including temperatures above 30 degrees Celsius [6].

Group 1: April Weather Characteristics - April experienced warm and dry weather, with an average temperature of 12.7°C, which is 1.7°C higher than the historical average and the second highest since 1961 [2] - National average precipitation was 32.7 mm, 13.3% lower than the historical average, with some regions experiencing a decrease in precipitation by 20% to 100% [3] - A nationwide cold wave affected most regions, causing strong winds and severe weather events, with gusts reaching up to 15 levels in some areas [4] Group 2: May Holiday Weather Forecast - The early part of the May holiday is expected to be mostly sunny, with light to moderate rain in some regions, while the latter part will see significant rainfall in the southwest and southern regions [5][6] - Temperature fluctuations are anticipated, with northern areas experiencing a drop of 4-8°C due to cold air, while other regions may be close to or above the historical average [5] Group 3: May Climate Trend Predictions - Precipitation is expected to be above the historical average in northeastern regions and parts of Inner Mongolia, while most other areas will see average to below-average precipitation [7][8] - Temperatures in most regions are projected to be close to or above historical averages, with three cold air events expected to impact northern areas [8] Group 4: Key Areas of Concern for May - Attention is needed for meteorological droughts and dry winds affecting crop growth, particularly in the northwest and central regions [9] - Risks of strong winds, sudden temperature drops, and sandstorms are heightened in northern areas due to frequent cold air activities [9] - Potential for secondary disasters from heavy rainfall and low temperatures in southern and southeastern regions, necessitating monitoring and preparedness [9]

Core Viewpoint - The recent sandstorm has affected 18 provinces in China, marking one of the most extensive sandstorm events in recent years, with the dust reaching as far south as Hainan Island [1][2]. Group 1: Weather Impact - The Central Meteorological Observatory issued a blue warning for sandstorms, predicting dust and floating dust weather from April 13 to April 14 across multiple provinces including Xinjiang, Inner Mongolia, and Guangdong [2][3]. - The sandstorm has led to reduced visibility and deteriorating air quality, adversely affecting transportation and public health [5]. Group 2: Causes of the Sandstorm - Three main factors contributed to the widespread sandstorm: extreme winds leading to high intensity of dust, high altitude of dust transport allowing rapid movement, and early cessation of rainfall in southern regions which reduced the settling effect of precipitation [4]. Group 3: Duration of the Sandstorm - The Central Meteorological Observatory has issued an orange warning for strong winds, indicating that many areas in the north will continue to experience winds of 5 to 7 levels, with gusts reaching 8 to 10 levels [6]. - Dust conditions in southern regions are expected to persist until the morning of April 14, with recommendations for the public to minimize outdoor activities and take protective measures [7].

4月1 3日，据@中央气象台 消息：这次沙尘的影响范围太大了，一路干到了华南地区。 今天，受地面大风和沙尘传输影响， 广东北部和西南部等地将出现扬沙或浮尘天气， 同时全 省各地气温陆续下降，降温幅度在3至6℃，公众外出需做好健康防护措施。 昨天，广东大部出现降雨，较强降雨主要出现在中东部，局地遭遇暴雨，并伴有8至1 0级雷暴 大风。 @广东天气 转发广州生态环境微博： 超标污染物为PM1 0，建议儿童、老年人和病人尽量留 在室内，避免体力消耗，一般人群尽量减少户外活动！ 据广州生态环境监测中心站今早发布广州全市环境污染情况。 根据广东天气停课玲APP，广州一地显示"重度污染"。 为何沙尘能吹到华南这么远？ 来源丨南方都市报 本期编辑 黎雨桐 关键时刻，巴菲特突然出手！ 经济史和实证证明，关税讹诈不会得逞 SFC 21君荐读 中国天气网气象分析师孙倩倩表示，这次起沙过程的大风猛烈，向南推进得很快，并且高空 槽深厚，动力抬升也强，使得沙尘的浓度和高度都较高，进而向南传输更远。以往沙尘最远 也抵达过华南，但这种情况比较罕见。 这次过程以扬沙或浮尘为主，达不到沙尘暴的强度。浮尘、扬沙、沙尘暴有什么不同？浮 尘：无风或 ...