I very nearly made the mistake of going out for a walk the other day without any photo gear.. the weather had just barely let up after snowing all day and it was still gray and dark when I left the house. Luckily I relented and grabbed my SLR, because 10 minutes later, the local fog had lifted and I had a few minutes to capture some spectacular light on the dissipating clouds far below.
This was shot from a forestry road that runs around the town just below our house. Someone had amazingly driven their truck up the road earlier, providing me a couple of nice tracks through the deep snow to walk on, otherwise I probably wouldn't have bothered to hike to this spot.. one of the few nearby that offers a view out through the dense trees to the lower elevations. That's the luck element, I guess.. I have gone out many days looking specifically for light and clouds that look like this, and come up empty, then this day unexpectedly, it's right there and I just had to be ready.
That is actually not the sun you see shining THROUGH the cloud, but a bright reflection ON the cloud, as the sun in this scene was way off to the left and just a few minutes from setting... the resulting touch of orange/yellow against the soft blues is really important to the scene, don't you think? A painter would know that and simply add it in; for a photographer it's a more elusive thing, but that's the fun and the challenge of landscape photography.
Check out the SkyWatch homepage every weekend for more great sky images from all around the world.