Statistiques de Vent de Aticama, moyennes sur Hiver depuis 2006
The rose diagram shows how commonly and how strongly the wind blows from different directions over a normal northern hemisphere winter. The biggest spokes point in the directions the wind most commonly blows from and the shade of blue suggests the strength, with the strongest winds shown by deep blue. It is based on 6931 NWW3 forecasts of wind since since 2006, at 3hr intervals, for the closest NWW3 model node to Aticama, located 31 km away (19 miles). There are insufficient recording stations world wide to use actual wind data. No doubt some coastal places have very localized wind effects that would not be predicted by NWW3.
According to the model, the dominant wind at Aticama 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 Aticama. Converseley, dominant spokes illustrate 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 northern hemisphere winter, the model suggests that winds are light enough for the sea to be glassy (the lightest shade of blue) about 42% of the time (38 days each northern hemisphere winter) and blows offshore 69% of the time (27 days in an average northern hemisphere winter). Over an average northern hemisphere winter winds exceeding >40kph (25mph) are not expected, but 0 have winds on the range 30-40 (19-25) at Aticama
IMPORTANT: Beta version feature! Swell heights are open water values from NWW3. There is no attempt to model near-shore effects. Coastal wave heights will generally be less, especially if the break does not have unobstructed exposure to the open ocean.