Rock Island Wind Stats

This picture shows how often and how strongly the wind blows from different directions over a normal July. The largest spokes point in the directions the wind most commonly blows from and the shade of blue indicates the strength, with dark blue showing the strongest winds. It is based on 3472 NWW3 forecasts of wind since since 2006, at 3hr intervals, for the closest NWW3 model node to Rock Island, located 33 km away (21 miles). There are too few 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 Rock Island blows from the S. If the rose plot shows a nearly round shape, it means there is no strong bias in wind direction at Rock Island. On the other hand, dominant spokes represent favoured directions, and the more deep blue, the stronger the wind. Spokes point in the direction the wind blows from. During a typical July, the model suggests that winds are light enough for the sea to be glassy (light blue) about 4% of the time (1 days each July) and blows offshore just 8% of the time (2 days in an average July). Over an average July winds stronger than >40kph (25mph) are expected on 2 days at Rock Island

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