小观看天丨今天立春，盆地大部阴天间多云，早晚温差大（2026.2.4）

Group 1 - The article discusses the weather forecast for February 4, indicating a transition to warmer temperatures with varying conditions across different regions of Sichuan Province [1] - The forecast predicts cloudy weather for most of the basin, with scattered light rain in the southwestern mountainous areas and possible light snow or rain in the northwestern and northern parts of Ganzi and Aba prefectures [1] - A new cold air mass is expected to bring a round of rain and snow to southern China starting from February 5, prompting the public to pay attention to weather updates and adjust clothing accordingly [1]