２００２年１２月１３日午夜，天津的上空飘起了雪，气温的原因，使得原本就不大的雪花，在落地前已经融化成了水。无从考证是１３日午夜，还是１４日凌晨气温骤降。但１４日早晨，被寒冰映亮的路面，足以证明天津受到了冷空气的袭击。天津的交通也因此遭遇了行路难的问题。早? At midnight on December 13, 2002, the sky over Tianjin floated snow and the reason for the temperature was that snowflakes, which were not originally large, had melted into water before landing. No research is midnight on the 13th, or the temperature on the 14th suddenly plunged. However, on the morning of the 14th, the ice-covered road surface was enough to prove that Tianjin was hit by cold air. Therefore, the traffic in Tianjin suffered a difficult road. early?