That wind indicator is part of an AMX module for their iWeather service. Unfortunately it wouldn't do you much good unless you are also an AMX dealer.

In essence though all it is, is a background with a needle laid over it for wind direction, one for each point of the compass - 16 in total. Then there is one style of needle for windy, one for breezy - for a total of 32. Whatever system you are using, you'd just have to figure out the way to allocate each direction to a bitmap.

Hope that helps.