Grandma's Wind Stats

This picture describes how often and how strongly the wind blows from different directions over a normal May. 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 3192 NWW3 forecasts of wind since since 2007, at 3hr intervals, for the closest NWW3 model node to Grandma's, located 33 km away (21 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 Grandma's blows from the SSW. If the rose diagram shows a close to circular outline, it means there is no strong bias in wind direction at Grandma's. By contrast, 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 May, the model suggests that winds are light enough for the sea to be glassy (light blue) about 15% of the time (5 days each May) and blows offshore 58% of the time (18 days in an average May). Over an average May winds exceeding >40kph (25mph) are not expected, but 3 have winds on the range 30-40 (19-25) at Grandma's

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