Shag Rock Wind Stats

The rose diagram shows how commonly and how strongly the wind blows from different directions over a normal November. The largest spokes point in the directions the wind most commonly blows from and the shade of blue indicates the strength, with the darkest shade of blue showing the strongest winds. It is based on 3347 NWW3 forecasts of wind since since 2006, at 3hr intervals, for the closest NWW3 model node to Shag Rock, located 16 km away (10 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 dominant wind at Shag Rock blows from the WSW. If the rose plot shows a nearly round shape, it means there is no strong bias in wind direction at Shag Rock. By contrast, dominant spokes show favoured directions, and the more dark blue, the stronger the wind. Spokes point in the direction the wind blows from. During a typical November, the model suggests that winds are light enough for the sea to be glassy (the lightest shade of blue) about 14% of the time (4 days each November) and blows offshore 26% of the time (8 days in an average November). Over an average November wind stronger than >40kph (25mph) was forecast for only a single days at Shag Rock

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