2月21日起，春节假日期间，受寒潮冷空气影响，内蒙古自治区多地出现大风沙尘和降温降雪天气。内 蒙古自治区气象局于2月20日启动重大气象灾害（大风、寒潮）四级应急响应命令，并发布大风蓝色、 大风黄色、沙尘暴黄色、寒潮黄色预警。 内蒙古自治区气象部门密切监测天气形势，及时发布内蒙古旅游景点24小时天气预报、全区环境空气质 量监测与预报等服务产品，并联合内蒙古自治区公安厅交通管理总队、自治区综合交通运行监测与应急 指挥中心发布内蒙古交通气象服务专项产品，为春节假期公众返程保驾护航。 同时，包头市、乌海市、乌兰察布市等地文旅部门根据气象部门发布的沙尘天气影响，临时关闭南海湿 地、乌海湖、乌兰哈达火山等多处景区。 （作者：李云逸 高菲 责任编辑：郭曼如） 鄂伦春自治旗7个监测站出现暴雪，针对此次天气过程，自治旗气象局将暴雪灾害四级应急响应提升为 三级。根据气象预警信息，各部门、各乡镇迅速响应、高效联动，交通部门对旗内1条省道、2条县道实 施交通管制及限行措施，全旗客运车辆全部停运；文旅部门及时启动应急预案，1处红色文化旅游景区 临时闭园，切实保障游客与工作人员安全；供热单位开展供热指标调整和调配热源供应，加强管线巡 护 ...

预计23日白天到晚上，盆地大部阴天有阵雨或雷雨，西南部局部有中雨，冷空气影响时有4~6级偏北风，局地可达7级或以上，日平均气温下降2~4℃，日最 高气温下降6~8℃；阿坝州大部、甘孜州东部和凉山州东北部阴天间多云有阵雪或阵雨，局地中雪，川西高原和攀西地区其余地方多云。 川观新闻记者 陈婷 降温降雨又要来了！从2月21日开始，我国西北地区东部、内蒙古、黑龙江、江淮及其以北大部地区都出现了大风降温和沙尘天气，部分地方还出现了强降 雪。 中央气象台今天（2月22日）6时继续发布寒潮蓝色预警、暴雪蓝色预警、大风黄色预警，同时发布沙尘暴蓝色预警。不过，这四个气象预警的预警范围没有 四川，也就是说，今天白天，四川还不会受到大风、沙尘、冷空气的影响。 根据四川省气象台今日早间的最新研判，今天白天，盆地大部将暂别连日来的晴好天气，逐渐转为阴天，可能有分散阵雨或雷雨；阿坝州南部、甘孜州中东 部和凉山州东北部也将有分散阵雨或阵雪出现。但今天白天四川的气温还将延续一个"暖"字：盆地最高气温为22～25℃。 对四川来说，明显的降雨主要出现在今天晚上到明天白天，降温将于明天到来。 四川省气象台预计，22日晚上，盆地大部阴天有阵雨或雷雨 ...

Core Viewpoint - A significant weather change is expected after the Spring Festival holiday, with a cold wave, strong winds, sandstorms, and heavy snowfall affecting various regions in China, leading to temperature drops exceeding 10°C in northern areas [1][4][5]. Group 1: Temperature Changes - The cold wave will continue to impact China, with northern regions experiencing temperature drops of 6 to 10°C, and some areas in Inner Mongolia and Northeast China seeing drops of 12 to 14°C [4][5]. - Major cities like Changchun and Shijiazhuang will experience drastic temperature changes, with highs dropping from over 15°C to below freezing [8]. - The southern regions will also see a temperature decrease of around 10°C due to increased rainfall starting from January 22 [8]. Group 2: Weather Warnings - The Central Meteorological Observatory has issued warnings for cold waves, strong winds, sandstorms, and heavy snowfall as the cold air moves eastward [3][4]. - Strong winds are expected in northern regions, with gusts reaching 9 to 10 levels in some areas, contributing to the largest and strongest sandstorm of the year [8][9]. Group 3: Rain and Snow Forecast - Significant rain and snow are anticipated, particularly in Inner Mongolia and Northeast China, with some areas experiencing heavy to extreme snowfall [11]. - A new round of rainfall will begin in southern regions, with potential thunderstorms and severe weather conditions expected on January 23, coinciding with the peak travel period after the holiday [12][13].

Summary of Key Points Core Viewpoint - The weather in Changsha is expected to transition from cold to warmer temperatures over the next few days, with a significant rise in temperature following a period of mixed rain and snow [1][4][5]. Weather Forecast - On January 31, rain mixed with snow will dominate, with a high of 5°C and a low of 1°C [1]. - February 1 will see a shift to cloudy and sunny weather, with temperatures rising to a high of 10°C and a low of 2°C [4]. - By February 2, the weather will be mostly sunny with temperatures reaching 14°C and a low of 4°C [5]. - From February 3 to 4, temperatures will continue to rise, reaching highs of 16°C and 18°C, with lows of 6°C and 7°C respectively [6]. Weather Warnings and Precautions - The Hunan Provincial Meteorological Station has issued a yellow warning for low temperatures, rain, and snow, predicting that certain areas will experience mixed rain and snow, with temperatures dropping below 2°C [6][8]. - Citizens are advised to take precautions against slipping during mixed rain and snow conditions and to monitor road conditions for ice [6]. - It is recommended to dress appropriately for the temperature fluctuations to avoid colds, and to utilize sunny days for drying bedding and clothes [6]. Cold Wave Impact - A cold wave is characterized by a significant drop in temperature, often accompanied by strong winds and precipitation, which can adversely affect agriculture, transportation, and public health [10]. - The cold wave can lead to severe weather conditions such as strong winds (5-8 levels) and freezing temperatures that can damage crops and disrupt transportation [10]. Frost and Freezing Rain - Frost occurs when air temperatures drop suddenly, causing damage to crops and plants, particularly sensitive species like corn and soybeans [13]. - Freezing rain can create hazardous conditions for transportation and can lead to significant damage to infrastructure [19]. Recommendations for Safety - During cold weather, it is crucial to dress warmly, secure windows and doors, and avoid outdoor activities, especially for vulnerable populations [10][12]. - Precautions should be taken to prevent accidents due to icy conditions, including the use of salt on roads and maintaining safe driving practices [26].

Group 1 - The China Meteorological Administration upgraded the emergency response for major meteorological disasters (cold wave) from level four to level three, which includes cold wave, frost, and snowstorm warnings [2] - The Central Meteorological Observatory issued a yellow warning for cold waves, a yellow warning for frost, and a blue warning for snowstorms as of January 18 at 18:00 [2] - In response to the cold wave, various regions across the country quickly activated emergency response mechanisms, with departments mobilizing to ensure public welfare and strengthen warmth defenses [2]

Weather Alerts - The Central Meteorological Observatory has issued yellow alerts for freezing, cold wave, and snow as of January 19 [1][3] - A significant temperature drop of 6-10°C is expected across the Huanghuai region and southward from January 19 to 21, with some areas experiencing drops of 10-14°C and localized drops exceeding 16°C [1] Temperature Forecast - From January 19 to 21, average daily temperatures in various regions of Zhejiang will decrease by 8-11°C, with minimum temperatures expected to reach -1 to -4°C in most areas and -4 to -7°C in mountainous regions [6] - The lowest temperatures are anticipated on January 22, with widespread freezing conditions [6] Precipitation and Snowfall - A weak rain and snow event is forecasted for January 19-20, with potential for rain mixed with snow in the northwestern mountainous areas of Zhejiang [6] - In Hangzhou, there is a possibility of seeing snowflakes, particularly in higher altitude areas where conditions for snowfall are more favorable [6] Transportation Impact - Due to the cold wave, several trains have been suspended in Zhejiang, including multiple routes from Hangzhou West Station and Chuzhou Station [8][9] - The railway department plans to temporarily suspend some passenger trains on various high-speed rail lines from January 19 to January 20 due to the impact of snowfall [11]

Group 1 - The Hunan Meteorological Observatory has issued an orange cold wave warning, predicting a temperature drop of over 12°C in most areas of Hunan from 8 AM today until 8 AM on the 21st, with minimum temperatures expected to fall below 0°C in many regions [1][3] - A yellow warning for low temperature, rain, and snow has also been issued, forecasting freezing rain, sleet, or snow in parts of Hunan from 8 AM on the 19th to 8 AM on the 20th, with minimum temperatures below 0°C [3] - The provincial meteorological bureau has activated a level three emergency response for low temperature, rain, and snow, with relevant units entering a state of emergency response [3] Group 2 - The latest weather forecast for Changsha indicates a transition from light rain to freezing rain on the 19th, with temperatures ranging from -1°C to 3°C, and a forecast of snow on the following days [5][6] - Specific weather conditions include freezing rain turning to snow on the 20th, with temperatures dropping to -3°C to -1°C, and continued snow on the 21st [5][7] - The forecast also includes a clear day on the 23rd, with temperatures ranging from -3°C to 6°C [5][7] Group 3 - The public is advised to take precautions against the cold wave, including wearing warm clothing and securing outdoor items that may be affected by strong winds [9] - Recommendations include avoiding outdoor activities during severe weather and ensuring safety measures are in place for vulnerable populations [9][12] - The impact of cold waves includes potential damage to agriculture, transportation disruptions, and health risks due to extreme temperature drops [12][21]

Core Viewpoint - The first major cold wave of the year is expected to bring the coldest weather since the start of winter to central and eastern China, with significant impacts on various provinces including school closures and emergency responses [1][2][3] Weather Warnings - The Central Meteorological Administration issued multiple yellow warnings for cold waves, heavy snow, and freezing conditions, indicating a significant drop in temperatures across various regions [1][2] - From January 19 to 21, average daily temperatures in the Huanghuai region and southward are expected to drop by 6-10°C, with some areas experiencing drops of 10-14°C or more [1][2] Snow and Ice Conditions - Heavy snow is forecasted for several provinces, with some areas expecting snowfall of 10-18 millimeters, and local accumulations of 4-12 centimeters [1][2] - Freezing rain is anticipated in southeastern Henan, southwestern Anhui, and other regions, with expected ice accumulation of 1-3 millimeters, and localized areas reaching up to 8 millimeters [2] Emergency Responses - The China Meteorological Administration has upgraded its emergency response to a level three due to the extensive impact of the cold wave, with specific focus on the risks of low-temperature rain, snow, and ice disasters [3] - Local governments in provinces such as Henan and Anhui have announced school closures and other measures to ensure public safety during the severe weather [4]

Core Viewpoint - The article discusses the impact of a cold wave on a large part of China, leading to the upgrade of the major meteorological disaster response level from four to three due to cold wave, freezing, and snowstorm warnings [1] Weather Warnings - The Central Meteorological Observatory issued a yellow warning for cold waves, freezing, and a blue warning for snowstorms as of January 18 [1] - From the night of January 18 to January 21, the average daily or minimum temperatures in central and eastern China are expected to drop by 6°C to 12°C, with some areas experiencing drops of 12°C to 14°C, and localized drops exceeding 16°C [1] Temperature Forecast - By the morning of January 21, the zero-degree Celsius line is projected to move southward to a line from southern Guizhou to southern Hunan, central Jiangxi, and southern Zhejiang [1] Snowfall Predictions - The Central Meteorological Observatory forecasts heavy snow in parts of southern Shaanxi, central and southern Henan, northern Anhui, and northwestern Hubei from 20:00 on January 18 to 20:00 on January 19 [1] - Areas in southern Shaanxi, southern and western Henan, northwestern Anhui, and northwestern Hubei may experience blizzards during this period [1] Freezing Rain Forecast - Freezing rain or ice pellets are expected in parts of southeastern Henan, western Anhui, northern and western Hubei, southeastern Shaanxi, and northern Chongqing from 20:00 on January 18 to 20:00 on January 19 [1]

Core Viewpoint - A significant cold wave is affecting central and eastern China, leading to substantial temperature drops and widespread rain and snow, with specific warnings issued for various regions [1][3][4]. Summary by Sections Weather Impact - The cold wave is expected to cause average daily or minimum temperatures to drop by 6 to 12 degrees Celsius across central and eastern regions from January 18 to 21, with some areas experiencing drops of 12 to 14 degrees Celsius, and localized drops exceeding 16 degrees Celsius [3][4]. - Rain and snow are forecasted to occur from north to south in the central and eastern regions, with heavy snow expected in parts of Shaanxi, Henan, Anhui, and Hubei, with snow accumulation of 4 to 8 centimeters, and localized areas exceeding 10 centimeters [4][5]. Emergency Responses - Schools in Henan, Anhui, Jiangsu, and Hubei have announced closures due to the severe weather, with specific regions like Zhoukou and Zhumadian suspending all in-person classes on January 19 [5][6][12][14]. - The National Disaster Reduction Committee has activated a Level 4 emergency response for low-temperature rain and snow disasters in provinces including Anhui, Henan, Hunan, and Guizhou [19]. Health and Safety Recommendations - Health authorities in Henan have advised vulnerable populations, including pregnant women, the elderly, and those with chronic illnesses, to monitor their health closely due to the expected temperature drops of 10 to 15 degrees Celsius, with some areas exceeding 20 degrees Celsius [5].