Where can I find details about 'wind' data in MATLAB?

If you use the command below, you can load three dimensional wind data but I cannot find any details about it.

data = load('wind')

data = struct with fields:
    u: [35×41×15 double]
    v: [35×41×15 double]
    w: [35×41×15 double]
    x: [35×41×15 double]
    y: [35×41×15 double]
    z: [35×41×15 double]

I think u, v, w are the wind velocity (in meter/seconds?) along latitude, longitude, and altitude. x, y, z are the corresponding coordinates. Is there any resource that I can confirm this with? I googled it but ended up finding many different wind models in Simulink and couldn't find the details of this data.

[Dyuman Joshi]

Yes, you are correct.

From the webpage - MATLAB Example Data Sets

wind.mat - 3-D data on air currents over North America. The data consists of (x,y,z) position components and (u,v,w) velocity components.

Data Size: Six matrices of size 35-by-41-by-15

Though there is no mention of the unit of the data, but I guess you can assume it to be SI units.