I'm quite certain of what both my son and I saw and watched for 10 minutes. It was not a shadow. In that shot, you have three layers of clouds. You have the high cirrus clouds, so nearby midlevel clouds and the massive vertical thunderhead way off in the background. What we watched were the cloud actually dissipating. This wasn't a shadow being created. Those high clouds were split from the center of the streak and out. I took the pictures one after the other so a person could see how they were being formed.

Here's the first one. You can see two streaks already formed. There is the massive one in the center and a smaller one that has already started to close back up on the right. The one on the right was as vivid and solidly blue as the one in the center.

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Here's the next picture taken probably less than a minute after the first. The center streak that was in the first shot has opened all the way out of sight beyond the cloud. To the left, you can see two more streaks starting to form.

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Here's the third pic. I dropped the camera down because, well, I was impressed with the huge thunderhead. Thought I'd add the scale of that monster into the shot. You can still see the center streak and the area to the left is really starting to part.

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Next picture...In this one, you can still see the old center streak, partly filled back up. The two streaks to the left are clear and haven't cut all the way through the cloud yet. You can see the edge of the high cirrus cloud at this point.

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Then came the shots that I put up here originally. Imageshack is hating me right now, lol.

Now, how you could possibly think this is a cloud when it's blue sky showing and not a shadow overlaid upon the cloud (which I have seen before) is beyond me. It's blue and it's the sky. If there was actually cloud still there and it was a shadowy shape on the cloud layer, you wouldn't see me making a post asking what the heck...

Stephanie

In every man there is something wherein I may learn of him, and in that I am his pupil.--Ralph Waldo Emerson