三九期间全国大部偏暖温差增大

Group 1 - The northeastern region of China is experiencing increased snowfall due to a new cold air mass, with some areas expected to see heavy snow [1][3] - The central meteorological station forecasts that from January 9, areas in Inner Mongolia, northeastern China, northern Shandong Peninsula, and parts of Jilin and Liaoning may experience moderate to heavy snowfall [1][5] - The overall weather pattern in most of the central and eastern regions remains dry, with some areas facing high forest fire risk due to low precipitation [5][8] Group 2 - The temperature in the northeastern region is expected to fluctuate significantly, with a potential drop of 4 to 8 degrees Celsius, and in some areas, over 10 degrees Celsius due to the impact of cold air and snowfall [7][8] - The central and eastern regions, excluding the northeast, are predicted to be warmer than usual during the "Three Nines" period, with daytime temperatures reaching around 15 degrees Celsius [7][8] - The temperature difference between day and night in many areas is expected to exceed 10 degrees Celsius, with some regions experiencing differences of up to 20 degrees Celsius [7][8]