（原标题：大雨大暴雨，要来了！） 昨天，我国雨雪天气主要出现在东北、西南和青藏高原等地的部分地区，黑龙江、西藏等局部现强降 雪。监测显示，昨天8时至今天6时，西藏东部和南部、青海东南部、川西高原、黑龙江、吉林、辽宁北 部等地出现小到中雪或雨夹雪，局地大到暴雪；四川南部、重庆西南部、西藏东南部、云南西北部和南 部、广西西部出现中到大雨，云南西北部和南部局地暴雨。 今明天，东北地区和青藏高原雨雪逐渐减少、减弱。西南地区降雨增强，而且降雨区域还将东扩至江 南、华南，部分地区有暴雨或大暴雨。 具体来看，中央气象台预计，今天，黑龙江东南部、吉林东部、西藏北部和东部、青海南部和西部、川 西高原等地部分地区有小到中雪或雨夹雪，其中，西藏东北部等地局地有大到暴雪。西藏东南部、四川 南部、云南大部、贵州、湖南西部、海南岛等地部分地区有中到大雨，其中，云南中西部、海南岛东南 部等地局地有暴雨或大暴雨。 明天，黑龙江西北部、新疆北疆北部和南疆西部山区、西藏东北部、青海东部、甘肃西南部、川西高原 北部等地部分地区有小雪或雨夹雪，局地有中雪。江南南部和西部、西南地区南部、华南大部等地部分 地区有中到大雨，其中，湖南南部、云南西南部、海 ...

Summary of Key Points Core Viewpoint - The article discusses the weather conditions in China, highlighting significant rainfall and temperature fluctuations across different regions, with a focus on the southern areas experiencing heavy rain and the northern regions facing temperature changes. Group 1: Weather Conditions - The northeastern region and the Tibetan Plateau are expected to see a reduction in rain and snow, while the southern regions, particularly Southwest and Jiangnan, will experience intensified rainfall, with some areas facing heavy rain or even torrential downpours [1][3][4]. - Specific forecasts indicate that areas such as southeastern Heilongjiang, eastern Jilin, and parts of Tibet will experience light to moderate snow or sleet, with localized heavy snow expected in northeastern Tibet [3][4]. Group 2: Temperature Changes - The article notes a significant drop in temperatures across many southern cities, with maximum temperatures in Guiyang reaching only 11°C and in Kunming dropping to 10°C, potentially setting new lows for the second half of the year [8]. - In contrast, northern regions like Northeast and North China are experiencing notable temperature fluctuations, with cities like Shenyang seeing a drop from 14°C to 8°C due to cold air and precipitation [8].