周末寒潮携大风来袭，江苏多地气温骤降8～9℃

Core Viewpoint - The article discusses a significant temperature increase in the central and eastern regions of China, with some areas breaking historical records, followed by a forecasted sharp drop in temperatures due to incoming cold air [1]. Weather Forecast Summary - On December 19, temperatures in Nanjing reached over 20°C, significantly higher than the usual 10°C for mid-December, marking a record high [1]. - A cold air mass is expected to move from north to south, leading to a "cliff-like" drop in temperatures across most of the central and eastern regions, returning to seasonal averages [1]. - A blue cold wave warning has been issued for Jiangsu Province, predicting a temperature drop of 8-9°C in certain areas and 6-7°C in others from December 20 to 22 [1]. - The lowest temperatures are anticipated on the morning of December 22, with northern areas potentially reaching around -2°C and localized frost expected [1]. Precipitation and Drought Conditions - Jiangsu has been experiencing below-average precipitation, with southern regions facing moderate to severe drought conditions [1]. - Light rain is expected in some areas south of the Huai River on December 20, but the rainfall is likely to be insufficient to alleviate drought conditions, serving only to slightly moisten the environment [1]. - Additionally, fog and haze are forecasted for December 20, necessitating public health precautions, with improvements expected after December 21 [1].