For the areas where 3TIER has released data, the FirstLook interface shows the annual average wind speed range at your selected hub height. Since the numbers shown are an annual average, they combine both windy and non-windy periods. As a rough estimate, an average annual wind speed of 4.5 m/s (10 mph) is usually considered the cut-off for a grid-connected residential system to be economically viable.

The wind speed shown on the FirstLook interface is the annual average wind speed. The color overlay allows you to compare different regions on the map using the color scale located in the upper right-hand corner of the map. "Warm" colors like brown and orange indicate higher wind speeds. "Cool" colors like purple and blue indicate lower wind speeds.

The color overlay shows our best estimate of the annual average wind speed. We are 68% confident that the true annual average wind speed falls within the range shown in the data display window.