周二雨雪上线 周四早晨大部分地区气温跌破“冰点”

Summary of Key Points Core Viewpoint - A significant cold wave is expected to impact Zhejiang province, bringing rain and snow, with temperatures dropping sharply, particularly in the mountainous areas [1][2]. Group 1: Weather Changes - The weather has shifted from sunny conditions to overcast, with the highest temperature in the main urban area dropping to 14.5℃ [1]. - The cold wave's front is expected to arrive in Zhejiang on the morning of the 19th, with rain starting in the central and northern regions by noon [1]. - The main impact of the cold wave will be felt on the 20th, with rain and snow expected in various areas, including the possibility of moderate to heavy snow in higher elevations [1]. Group 2: Temperature Forecast - The average daily temperature is projected to drop by 8℃ to 11℃, with some areas exceeding a 10℃ drop, meeting the criteria for a cold wave [1]. - On the 20th and 21st, maximum temperatures are forecasted to be between 1℃ and 3℃, with minimum temperatures in flat areas dropping to 0℃ to -2℃ and in mountainous areas to -6℃ to -3℃ [2]. - The coldest morning is expected on the 22nd, with temperatures across the province likely to remain below 0℃, and mountainous regions could see lows between -7℃ and -4℃ [1][2]. Group 3: Snowfall Conditions - Despite favorable conditions for snow, including low temperatures and sufficient moisture, the ground temperature remains too warm for significant accumulation, leading to a likelihood of rain mixed with snow in urban areas [2]. - The city is expected to experience mostly wet snow that will melt upon contact with the ground, making accumulation unlikely [2]. Group 4: Future Weather Outlook - The cold snap is expected to be brief, with temperatures gradually rising and returning to around 10℃ by the weekend of the 23rd to 25th, accompanied by sunny weather [3]. - Another potential rainfall event may occur from the 26th to 27th due to southwest airflow and low-level disturbances [3].