冰点到19℃+ “火箭式”升温

Core Viewpoint - The article discusses a significant warming trend in Shanghai, with temperatures expected to rise sharply over the coming days, although this is not indicative of the official start of spring [2][3]. Temperature Trends - Monitoring data indicates that morning temperatures in Shanghai have risen by 3 to 5 degrees Celsius compared to the previous day, with the city center starting at 4.9 degrees Celsius and suburban areas like Qingpu and Fengxian reaching a low of -2.3 degrees Celsius [2]. - The highest temperature in Shanghai is projected to reach around 15 degrees Celsius today, with a peak of approximately 19 degrees Celsius expected mid-week due to strong warm and humid air [2][4]. Historical Context - Historical data from the Xujiahui meteorological station shows that significant warming in mid-January is not unprecedented, with about 10 years since 1873 recording maximum temperatures exceeding 20 degrees Celsius during this period [3][4]. - The warmest mid-January on record in the 21st century occurred in 2002, with an average temperature of 10.5 degrees Celsius and maximum temperatures exceeding 17 degrees Celsius for five consecutive days [4]. Weather Patterns - The current warming trend is characterized by a large diurnal temperature variation, with daytime warmth contrasted by cooler early morning and evening temperatures, leading to daily temperature differences potentially exceeding 10 degrees Celsius [3]. - A shift in weather patterns is anticipated over the weekend, with increased cloud cover and possible light rain, followed by another warming trend on Sunday [4]. Upcoming Weather Changes - A strong cold front is expected to move southward early next week, leading to significant wind, precipitation, and a drop in temperatures, creating a "roller coaster" effect in temperature changes [4].