Homemade weather vane

Installing a pole with a weathervane on the roof, just check the compass direction of the horizontal bars: Letters longer rods must exactly match the corresponding points of the four sides of the skyline. Having established the correct position, fasten the pole. The most simple weather vane - is narrow and long (up to 1 m) strip of material, the ribbon tied to the very top of any high column, etc. With the help of a weather vane you define the direction of the wind (blowing from) high above the ground. Wind direction in the higher layers of the atmosphere is determined by the movement of clouds.