| Beaufort |
Wind velocity (Km/h) |
Indication
|
Concept/ valuation
|
| 0 |
0 - 2 |
Smoke rises vertically |
calm |
| 1 |
2 - 5 |
Smoke is softly deviated to one side |
pleasant |
| 2 |
6 - 12 |
Wind is perceived on the skin |
pleasant |
| 3 |
13 - 20 |
Wind moves light flags |
moderated |
| 4 |
21 - 29 |
Dust and papers are moved |
moderated |
| 5 |
30 - 39 |
Small trees begin to be moved |
Live |
| 6 |
40 - 50 |
Umbrellas cannot be used |
strong |
| 7 |
51 - 61 |
All the trees are strongly moved / it is very difficult to walk against the wind direction |
strong |
| 8 |
62 - 74 |
Tree branches are broken |
very strong |
| 9 |
75 - 87 |
Important damages can be caused in buildings |
very strong |
| 10 |
88 - 101 |
Buildings can suffer a lot of damages |
massive |
| 11 |
102 - 116 |
Buildings can suffer a lot of damages |
massive |
| 12 |
117 > |
Buildings are destroyed / shelters for people are searched. |
hurricanes |