What Are These White Webs?

I was going to write about this subject last week, but I was curious to see if this phenomenon would happen again.  I haven't seen it before and I haven't seen it since.  It was shortly before the sun came up.  I always look out the window to see our view.  I look to see if there is anything new and what the weather is like.  At first I thought that there was frost on the trees.  Then I realized that it was much too warm for frost.  I went out on the deck to get a closer look.  This is what I saw.

It was foggy out on the marsh, and I thought there was a lot of frost on the bushes.

I zoomed in.  What was that?  It wasn't frost.

It looks like hundreds of spider webs.

As soon as the fog burned off and the sun came out, I could see better.

The bushes (mostly willow) were covered with white webs.

I started searching for what this was.  I found a lot of information on tent caterpillars, but they are usually seen in an area on a tree, but not on the whole tree unless they have already killed the tree.  I couldn't get close enough to see if I could see worms or insects.  I think these webs are from something I'm not familiar with.  I still don't know if it was a temporary thing or if the lighting was exactly right that day, but later in the morning they were gone.  At least, I couldn't see any webs, and I have not seen any since.  I am open to any ideas.  I am sure there are people who specialize in this and know exactly what it is.  If I find out, I will update this blog with that information.

The webs are gone or became invisible to me.