I. Geographical aspects
① The horizontal pressure gradient force points from high pressure to low pressure and is perpendicular to the isobar;
② The southern hemisphere winds to the left and the northern hemisphere winds to the right;
(3) If there is no beacon, it defaults to "up north, down south, left west and right east"; if there is a beacon, it is judged according to the beacon.
Second, life.
In which direction does the red flag fly, or hold a thin silk scarf in the air to see where it flies; Or grab a handful of fine sand from the ground and scatter it in the air, and you will know what the wind direction is.
When the wind comes, it should be:
(1) Go out as little as possible, ride less bicycles when you have to go out, and don't stay under billboards or temporary buildings for shelter.
(2) If you are driving, you should drive into the underground parking lot or bomb shelter.
(3) If you live in a tent, you should immediately put away the tent and take shelter from the wind in a solid house.
(4) If you are working or swimming on the water, you should immediately go ashore to take shelter from the wind, the ship should follow the instructions and return to Hong Kong to take shelter from the wind, and the sailing boat should put down its sails as soon as possible.
(5) Close the window carefully indoors, and stick an "M"-shaped adhesive tape on the window glass to prevent the glass from breaking and stay away from the window, so as to avoid the strong wind sweeping the sand and breaking the glass and hurting people.
(6) In public places, people should be evacuated to designated places.
(7) Strengthen agricultural production facilities in time and harvest mature crops as soon as possible.