暴跌12.2℃！寒潮来袭，浙江大部将跌破0℃，山区局部中到大雪，最厚衣服准备！

Core Viewpoint - A significant cold wave is expected to impact Zhejiang province, leading to a sharp drop in temperatures and potential health risks associated with low temperatures, particularly for vulnerable populations [1][4]. Weather Conditions - A cold air mass has already caused temperatures in northern Zhejiang to drop by 6-11°C, with a notable decrease of 12.2°C in Lin'an [1]. - The highest temperatures recorded yesterday in northern Zhejiang were between 13-16°C, while southern and southeastern coastal areas experienced temperatures of 19-22°C [1]. - The warmest locations included Yongjia at 23.4°C, Qingyuan at 23.3°C, and Wencheng at 22.9°C [1]. Upcoming Weather Forecast - From January 20, a cold wave will lead to a "rapid freeze" across Zhejiang, with temperatures in central and northern regions expected to drop below 5°C, accompanied by light rain and possible snow [2][4]. - The mornings of January 21 and 22 will see minimum temperatures ranging from 0 to -2°C in most areas, with mountainous regions experiencing temperatures between -3 to -6°C [4]. - A significant drop in maximum temperatures is anticipated, remaining in single digits throughout the day [4]. Health Advisory - The prolonged low temperatures may increase the risk of cardiovascular and respiratory diseases, particularly among the elderly and those with chronic conditions [4]. Wind and Rain Forecast - From January 19 to 22, coastal areas of Zhejiang will experience strong northerly winds of 8-10 levels, raising concerns for navigation safety [5]. - A warming trend is expected from January 23 to 25, with maximum temperatures potentially reaching double digits [5]. - A rain event is forecasted for January 25-26 due to southwest airflow and lower-level shear [5]. Fire Risk Advisory - The forest fire risk meteorological level is rated at four, indicating a high risk, necessitating enhanced fire source management in forest areas [6].