Now available as a tee shirt from We Love Fine! [link]
Worried about puddles at your picnic? Snow on your sandcastle? Hurricanes at your homecoming? Relax! Any weather calamities are firmly in hoof, thanks to the greatest weather pony in all of Equestria! Have no fear, Rainbow Dash is on the job!
Just as soon as she finished her nap...
NOTE- Big file is SUPER BIG in case anyone wants to use it for their Tablet BG. My experience with my Galaxy Tabs is that they have fairly small native dimensions (like 1200 x 800 or something) but taking into account rotation requires about twice the size to look good.
UPDATE- Here's a link to a 2048 x 2048 version more suitable for Ipads- [link]