Weather hazards caused by cold air masses

In winter (1), a province is located in the cold air mass of Kunming quasi-static front, with rainy days; High altitude, low temperature, high probability of freezing rain (or because of high terrain in the west and low terrain in the east, cold air is blocked from gathering). (2) The road surface is frozen, which affects traffic; Transmission facilities freeze and wires break, which affects transmission; Harm the growth of overwintering crops, leading to agricultural production reduction; The trees were destroyed.