Sea State

 

72-hour Wind Forecast over the Black Sea

The date in each frame is in the format "year month day"; the hour is in UTC.

Factors influencing wind waves formation:

    • Wind speed in one direction
    • Fetch
    • Wind duration
    • Bathimetry

All the above mentioned factors work together in wind formation.

 

Significant Wave Height and Wave Direction

 Significant Wave Height: mean height of the heigher 1/3  of the waves – this value is very close to the wave height evaluation from an experienced  observer.

 

 WMO Sea State

Code

 Description

Wave height

[m]
0 calm (glassy) 0 m
1 calm (rippled) 0 – 0,1 m
2 smooth (wavelets) 0,1 – 0,5 m
3 slight 0,5 – 1,25 m
4 moderate - МЕТЕОАЛАРМ 1,25 – 2,5 m
5 rough 2,5 – 4 m
6 very rough 4 – 6 m
7 high 6 – 9 m
8 very high 9 – 14 m
9 phenomenal > 14 m

 

The group for marine forecasts at NIMH–BAS