Kevin Palmer

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  • I chased a few thunderstorms that rolled off of the mountains in the afternoon. It was good rainbow weather, but they can't form in the middle of the day. Since the radius of a rainbow is always 42° and the center is directly opposite the sun (antisolar point), the sun must be at an altitude less than 42°. Around 5PM, the sun sank to 32° and this low rainbow appeared about 10° above the horizon. I stopped at this wetland and was able to cover my camera from the rain and capture a time lapse clip that I've tried many times to get. The extra colors (green, purple, green) at the bottom of the bow are called supernumeraries. It's a rare effect that happens when the raindrops are a specific diameter and mostly uniform in size. This complex light interference can't be explained by geometric optics. In fact, supernumerary rainbows played a part in the early 1800's in confirming that light is a wave, and not just made up of particles as previously thought.
    Supernumerary Rainbow
  • This double rainbow appeared in a receding rain shower near Parkman. It later became a supernumerary rainbow. But I'm not sure what it's called when all the colors seem to blend together in the middle.
    Parkman Double Rainbow
  • This bright and obvious halo appeared around the nearly full moon in San Diego. The lights at the bottom are from the Coronado Bridge.
    Halo and Goodnight
  • As I was packing up my tent this halo appeared around the sun. This is near the top of Sheep Mountain, Wyoming.
    Sheep Mountain Halo
  • This rainbow appeared in a small thunderstorm just outside of Sheridan. I used a telephoto lens to get a close-up view as it changed by the second.
    Hailbow
  • This rainbow appeared in a small thunderstorm just outside of Sheridan. I used a telephoto lens to get a close-up view as it changed by the second.
    Color Beams
  • At the end of February I went camping at Mammoth Hot Springs, the only campground in Yellowstone that stays open for the winter. With constant snow coming down, it was hard to get out of my tent in the morning. But as the sun started to climb over Mount Everts, I knew something special was about to happen. I climbed the hill across from the campground to watch this 22 degree halo appear. The sun was too bright to include in the photo so I used this tree to block it out.
    Mammoth Halo
  • I spotted these vivid iridescent clouds above the sun in Ranchester, Wyoming. The colors were more easily seen with sunglasses since the clouds were bright. It looked like an oil slick in the sky. There were plenty of lenticular clouds around, and it's common for those to show iridescence when they're in the right place.
    Iridescence
  • This halo stayed in the sky for most of the evening over the Icelandic village of Arnarstapi. The pyramid-shaped mountain is Stapafell, which is a lower peak of the glacier-capped Snæfellsjökull volcano behind it.
    The Halo of Arnarstapi
  • Eiger is one of the most recognized peaks in Switzerland. The 1,800 meter north face, called Eigerwand, is the biggest north face in the Alps and one of the most challenging climbs.
    Eiger Black and White
  • I spotted this bright sundog over a mountain near Grindelwald, Switzerland. It didn't last long.
    Alps Sundog
  • Eiger is one of the most recognized peaks in Switzerland. The 1,800 meter north face, called Eigerwand, is the biggest north face in the Alps and one of the most challenging climbs.
    Eiger North Face