TCs Wind Stats

The graph describes how commonly and how strongly the wind blows from different directions over a normal September. The biggest spokes point in the directions the wind most commonly blows from and the shade of blue indicates the strength, with deep blue strongest. It is based on 3360 NWW3 forecasts of wind since since 2006, at 3hr intervals, for the closest NWW3 model node to TCs, located 29 km away (18 miles). There are insufficient recording stations world wide to use actual wind data. Invevitably some coastal places have very localized wind effects that would not be predicted by NWW3. According to the model, the prevailing wind at TCs blows from the SW. If the rose diagram shows a close to circular outline, it means there is no strong bias in wind direction at TCs. On the other hand, dominant spokes show favoured directions, and the more the darkest shade of blue, the stronger the wind. Spokes point in the direction the wind blows from. During a typical September, the model suggests that winds are light enough for the sea to be glassy (pale blue) about 40% of the time (12 days each September) and blows offshore 41% of the time (12 days in an average September). Over an average September winds exceeding >40kph (25mph) are not expected, but 1 have winds on the range 30-40 (19-25) at TCs

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