0|Calm (glassy)|0
1|Calm (rippled)|0 – 0.1
2|Smooth (wavelets)|0.1 – 0.5
3|Slight|0.5 – 1.25
4|Moderate|1.25 – 2.5
5|Rough|2.5 – 4
6|Very|rough 4 – 6
7|High|6 – 9
8|Very high|9 –14
9|Phenomenal|Over 14