Le Petits Dalles Wind Stats

This picture illustrates how commonly and how strongly the wind blows from different directions over a normal April. The largest spokes point in the directions the wind most commonly blows from and the shade of blue implies the strength, with dark blue strongest. It is based on 3355 NWW3 forecasts of wind since since 2007, at 3hr intervals, for the closest NWW3 model node to Le Petits Dalles, located 23 km away (14 miles). There are not enough 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 Le Petits Dalles blows from the WSW. If the rose graph shows a fairly circular pattern, it means there is no strong bias in wind direction at Le Petits Dalles. On the other hand, 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 April, the model suggests that winds are light enough for the sea to be glassy (the lightest shade of blue) about 10% of the time (3 days each April) and blows offshore 27% of the time (5 days in an average April). Over an average April wind stronger than >40kph (25mph) was expected for only a single days at Le Petits Dalles

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