Sry, i don't have any file transfers (Macintosh = no internet has photoshop Windows = has internet no photoshop) so i can't post results:

1. Open new document in Imageready/Photoshop

2. Filter>Render>Clouds (if you don't really like the way the clouds are the first time, repeat it till ya like wat ya see)

3. Select>All (Ctrl+A)

4. Edit>Copy (Ctrl+C)

5. Edit>Paste (Ctrl+V) 9 more times till you have 10 layers

6. Select layer 10 and go Filter>Blur>Radial Blur at 100

Select layer 9, Filter>Blur>Radial Blur at 90
Select layer 8, Filter>Blur>Radial Blur at 80
Select layer 7, Filter>Blur>Radial Blur at 70
Select layer 6, Filter>Blur>Radial Blur at 60
Select layer 5, Filter>Blur>Radial Blur at 50
Select layer 4, Filter>Blur>Radial Blur at 40
Select layer 3, Filter>Blur>Radial Blur at 30
Select layer 2, Filter>Blur>Radial Blur at 20
Select layer 1, Filter>Blur>Radial Blur at 10

7. Edit>Paste (Ctrl+V) the clouds in as Layer 11, rename as layer 0, move below layer 1

8. Save and go to ImageReady if you are in Photoshop

9. First frame, make sure only layer 0 is visable
second frame = layer 1
third frame = layer 2
forth frame = layer 3, etc.
until you get to frame 11 layer 10

10. Duplicate frame 11 so you now have 12 frames

11. Now go reverse,
Frame 13 = layer 9
Frame 14 = layer 8
Frame 15 = layer 7, etc.

When you reach 22 frames your done! watch your storm spin!
(yes, i'm a newbie so for people who are more advanced will find this boring and will want screenshots, well i can't get any and i'm sry but if you could post your results, that would be great&#33