Dust Storm
We get dust storms from time to time here (though not as often as, say, in Eastern Washington, at least from the short experience I had there). Last night we had a big one, and as usual every surface is covered in dirt. While it was going on, it looked like a London fog, but with dirt instead of water.
What made this one different for me is that I got to see it roll in from the south. It was an amazing sight. It looked like a scene from Steven King's the Mist, or perhaps from the bottom of a volcano slope watching a pyroclastic flow coming at you. It reminded me of standing in the streets of Manhattan on 9/11 and watching the cloud of debris coming at us after the first tower fell. Here is a picture from the AZ Republic of the storm rolling in from the south like a giant tsunami.
Here is a video of it rolling in, which is really cool, if you can ignore the end-is-near typical style of local reporting that has to blow up every odd event into a catastrophe demanding that one tune in at eleven.