It's Sunday.
Here's another recording I just did.
This time I took the same Kleenex box I used before and without any air flow, I stuck it on the ground, placed the hole right next to the U87 and rubbed the top of the box with my finger in slow motions, making the nuances of the wind you hear here:
[soundcloud]utopiarc/wind-sample-2[/soundcloud]
The first section is the raw recording, and the second section is with a bit of reverb added.