0: calm (
Smoke rises vertically. 烟是垂直上升。
1: light air (1-5 km/h, 1-3 knots)
Wind direction shown by smoke-drift, but not by wind vanes. 从烟的动向可以判断出风向,但不能通过风向标判断。
2: light breeze (6-11 km/h, 4-6 knots)
Wind left on face; leave rustle; ordinary vanes moved by wind. 能感觉到风拂过脸庞;树叶沙沙作响;风向标被吹动。
3: gentle breeze (12-19 km/h, 7-10 knots)
Leaves, twigs in constant motion; wind extends light flag. 树叶、细枝不停地晃动;旗子迎风招展。
4: moderate breeze (20-28 km/h, 11-16 knots)
Raises dust and loose paper; small branches are moved. 尘土、纸片飞扬;小树枝开始晃动。
5: fresh breeze (29-38 km/h, 17-21 knots)
Small trees in leaf begin to sway; crested wavelets form on inland waters. 绿叶丛生的小树开始摇摆;内陆水域上形成小浪峰。
6: strong breeze (39-49 km/h, 22-27 knots)
Large branches in motion; whistling heard in telephone wires; umbrellas hard to use. 大树枝开始晃动;在电话里可以听到风声;撑伞变得困难。
7: moderate gale (50-61 km/h, 28-33 knots)
Whole trees in motion; inconvenience felt when walking against the wind. 整棵树都在晃动;逆风走路很不方便。
8: fresh gale (62-74 km/h, 34-40 knots)
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