Group 1 - The weather in Heilongjiang Province will experience significant fluctuations, with temperatures rising and then falling, resembling a "roller coaster" effect, along with two minor snowfall events [1][3] - From December 27 to 28, temperatures in most areas of Heilongjiang will rise significantly, reaching highs between -8°C to -4°C, with specific locations like Daqing, Harbin, and Mudanjiang seeing highs between -2°C to 0°C [3] - Starting December 29, temperatures will continuously drop, with lows in certain northern areas reaching between -36°C to -32°C, while other regions will see lows between -28°C to -24°C [3] Group 2 - There will be two snowfall events in the upcoming week, with light snow expected on December 28 in various regions, and localized moderate snow in northern areas [3] - The weather conditions, including fluctuating temperatures and snowfall, may lead to slippery roads and reduced visibility, impacting transportation [4] - Outdoor activity participants are advised to take precautions against cold weather and potential health issues, as well as to prepare for road conditions due to snow and ice [4]

Core Viewpoint - Jilin Province is experiencing significant snowfall, leading to the closure of multiple highways and delays in flights, with a notable impact on transportation and weather conditions in the region [1][2][4]. Group 1: Weather Impact - Jilin Province has seen a substantial snowfall event, classified as heavy snow, with the snowfall beginning early on December 23 and affecting areas from west to east [2]. - The snowfall has resulted in over 200 highway entrances being closed or restricted across the province by 1 PM [2]. - The weather system is expected to move quickly, with the snowfall likely ending by the night of December 23 to the early morning of December 24 [4]. Group 2: Transportation Disruptions - By 11 AM on December 23, 16 flights at Changchun Longjia International Airport were either canceled or delayed due to the snowfall [4]. - The airport has upgraded its snow removal emergency plan to a yellow alert level to ensure flight safety [4]. Group 3: Temperature Changes - Following the snowfall, Jilin Province is anticipated to experience a significant drop in temperature, with a cumulative decrease of 10°C to 14°C, and localized areas in the east potentially reaching lows of -30°C to -28°C by the early morning of December 26 [4]. - The average precipitation in Jilin Province from November 1 to December 15 was 15.7 mm, which is 37% less than the average for the same period, marking it as one of the driest winters since 2000 [4].

Group 1 - The Beijing Meteorological Station issued a yellow warning for road icing, predicting snowfall from the early morning to the morning of December 23, with surface temperatures below 0°C leading to potential road icing in some areas [1][2] - Snowfall is expected to start in the western districts of Yanqing, Fangshan, and Mentougou, with the main impact on urban areas occurring in the latter half of the night, tapering off by around 8 AM on the 23rd [1] - Accumulation of snow in urban and plain areas is expected to be less than 1 cm, while some mountainous areas may see 1 to 3 cm of snow [1] Group 2 - The snowfall is anticipated to create slippery road conditions and reduced visibility, negatively impacting traffic during the morning rush hour on the 23rd [2] - Certain road sections are likely to experience snow accumulation and icing, increasing the risk of traffic congestion and accidents, particularly in mountainous areas, bridges, and highways [2] - After the snowfall, a north wind is expected to strengthen, with gusts reaching up to 7 levels in mountainous areas, necessitating caution when outdoors [2]

Group 1 - A new cold air mass is affecting multiple regions in China, leading to significant snowfall and temperature drops [1] - Heavy snowfall warnings have been issued in Heilongjiang, with red alerts prompting coordinated snow removal efforts by various departments [3] - In Gansu, snowfall has resulted in temporary traffic controls on highways, with maintenance teams actively engaged in snow removal operations [5] Group 2 - Xinjiang's Qitai County is experiencing snowfall that is impacting travel, with multiple departments working together to ensure road safety and accessibility [6][8] - In Inner Mongolia's Hulunbuir, heavy snow has led to the suspension of passenger transport services, with continuous snow removal efforts being implemented [9][11] - Shanxi province is facing strong winds and temperature drops, with some mountainous areas recording lows of -22°C, prompting public advisories for cold weather preparedness [12][14]

Summary of Key Points Core Viewpoint - A significant cold air mass is expected to disrupt the recent warming trend in the central and eastern regions of China, leading to a temperature drop of over 10°C in many areas over the next three days [1]. Weather Impact - The central meteorological station forecasts a temperature decrease of 4°C to 6°C across most of the central and eastern regions, with some areas in Inner Mongolia, Gansu, Liaoning, and the Beijing-Tianjin-Hebei region experiencing drops of 8°C to 10°C, and localized areas exceeding 10°C [1]. - Wind conditions will also be affected, with 4 to 5 level winds and gusts reaching 6 to 8 levels in the affected regions, while eastern and southern sea areas may see winds of 5 to 7 levels and gusts of 8 to 9 levels [1]. Snowfall and Alerts - On December 19, significant rain and snow are expected to spread eastward, with northeastern regions anticipating heavy to blizzard-like snowfall. Areas such as northern Heilongjiang and western Gansu may experience substantial snow accumulation [1]. - A red snowstorm warning was issued in Heihe, Heilongjiang, as snowfall began on the night of December 18, prompting local authorities to mobilize snow removal efforts [5][6]. Local Responses - In Heihe, snow removal operations commenced early on December 19, utilizing a combination of manual and mechanical methods to clear snow from key areas [8]. - In Nenjiang, the combination of snowfall and gusty winds led to reduced visibility and severe road conditions, prompting emergency responses from local departments to clear roads and manage traffic [10]. - In Gansu, snowfall led to temporary traffic controls on highways, with maintenance crews actively engaged in snow removal [11]. - In Xinjiang, snow affected travel, prompting multiple departments to coordinate snow clearing and traffic management efforts [13]. - In Inner Mongolia's Hulunbuir, heavy snowfall resulted in the suspension of passenger transport lines, with local authorities implementing snow removal operations and issuing a blue cold wave warning [16].

Summary of Key Points Core Viewpoint - A significant increase in snowfall is expected in eastern Inner Mongolia and northeastern regions, with local areas experiencing heavy to blizzard conditions, necessitating public caution regarding road conditions and travel safety [1][2][4]. Weather Conditions - Eastern Inner Mongolia and northeastern regions will see increased snowfall today, with local areas expecting heavy to blizzard conditions, leading to snow accumulation of 4 to 8 centimeters, and locally exceeding 10 centimeters [2][4]. - The central and eastern regions will continue to experience dry weather with minimal precipitation over the next few days, prompting public advisories for hydration and safety regarding electricity and fire usage [2][4]. Temperature Fluctuations - A warming trend is observed in the central and eastern regions, with temperatures expected to rise significantly before a cold front causes a drop in temperatures, with some areas experiencing a temperature fluctuation exceeding 15°C [5]. - By early December, temperatures are projected to reach new lows across a wide area, with some regions experiencing a cumulative drop of over 15°C, and local areas potentially exceeding 20°C [5]. Rainfall Predictions - As warm and moist air strengthens in early December, a significant rainfall event is anticipated in southern regions, which, while not heavy, will help alleviate dryness and reduce forest fire risks in southern China [6].

Core Points - A new cold air mass is expected to impact the central and eastern regions of China starting tomorrow, leading to a significant drop in temperatures, with some areas experiencing a decrease of 8°C to 10°C [2][4] - The northeastern region will see increased snowfall, with blizzard conditions expected in central Heilongjiang, where snow accumulation could reach 10 centimeters or more [4][5] - The southern regions are experiencing unusual dryness, with relative humidity dropping below 20% in several areas, marking a record low for November [4] Summary by Sections Weather Forecast - The central and eastern regions will experience a brief temperature rise today, but this will be interrupted by the arrival of cold air starting tomorrow [2] - The temperature in Shenyang is projected to drop from a high of 11°C tomorrow to -7°C by December 2, marking the coldest temperatures of the second half of the year [2] Precipitation and Dryness - The southern regions are facing unprecedented dryness, with relative humidity in places like Hubei and Anhui dropping to as low as 9% [4] - In contrast, the northeastern areas will see frequent rain and snow, with significant snowfall expected in Heilongjiang and other parts of the northeast [4][5] Public Advisory - The public is advised to dress in layers due to significant temperature fluctuations, with day-night temperature differences reaching around 15°C in many areas [3] - During windy and dusty conditions, it is recommended to minimize outdoor activities and use protective gear such as masks [3]