Advice

This reports indicate either ship (type A) or buoy observations (type B).
At the category wave indicates Ø-period the average wave period (seconds) of all waves during the 20-minute period. The category max. period describes the dominant wave period (seconds) with the maximum wave energy.

Beaufortknotskm/hm/s
0 0- 1 0- 1 0 - 0.2
1 1- 3 1- 5 0.3- 1.5
2 4- 6 6- 11 1.6- 3.3
3 7-10 12- 19 3.4- 5.4
4 11-15 20- 28 5.5- 7.9
5 16-21 29- 38 8.0-10.7
6 22-27 39- 49 10.8-13.8
7 28-33 50- 61 13.9-17.1
8 34-40 62- 74 17.2-20.7
9 41-47 75- 88 20.8-24.4
10 48-55 89-102 24.5-28.4
11 56-63 103-117 28.5-32.6
12 >63 >117 >32.6