Onemana Wind Stats

The rose diagram shows how often and how strongly the wind blows from different directions through a typical May. The longest 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 2838 NWW3 forecasts of wind since since 2007, at 3hr intervals, for the closest NWW3 model node to Onemana, located 20 km away (12 miles). There are too few recording stations world wide to use actual wind data. Without question some coastal places have very localized wind effects that would not be predicted by NWW3. According to the model, the prevailing wind at Onemana blows from the ENE. If the rose graph shows a fairly circular pattern, it means there is no strong bias in wind direction at Onemana. Converseley, dominant spokes represent favoured directions, and the more deep blue, the stronger the wind. Spokes point in the direction the wind blows from. Over an average May, the model suggests that winds are light enough for the sea to be glassy (light blue) about 10% of the time (3 days each May) and blows offshore 45% of the time (4 days in an average May). During a typical May wind stronger than >40kph (25mph) was forecast for only a single days at Onemana

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