I grew up in Juniper Hell. Every season, lemon yellow powder drifted everywhere and coated everything in a chiffon dusting of pure eyewatering sneeze. I was over at a friends' house once. He had a pool. There was a bathtub line of chalk yellow at the water line. It was about an inch and a half tall and about an eighth of an inch thick. You could run your finger along it and get a solid handful of bright sunshiney glop. I hate New Mexico.
Atlanta A friend of mine had a picture that got picked up by one of the buzzfeed clones where she had over 2" of pollen on her car one morning. And now I cannot find the image. One of the interesting things about these types of pollen events is that they may be caused by frustrated male trees in urban environments due to the lack of female trees.