The skies here at our cabin just amaze me. I'm always finding something special. This week I saw the first solar halo of the season.
A solar halo occurs when when the sky is covered by thin cirrus clouds containing ice crystals high (5–10 km, or 3–6 miles) in the upper troposphere. The sunlight is bent as it passes through the ice crystals. It may also split the light into colors, much like a rainbow. Mine was of the more sedate white variety.
A 22 degree halo is the most common. The light from the sun passing through the ice crystals typically makes the inner edge of the circle more reddish and the outer edge more bluish. I saw this solar halo on May 10, 2015, looking south from my cabin in Hole in the Wall on Powell Lake in Coastal British Columbia. If it had been any bigger it would have been too large to capture the entire image in my camera's field.
And that's not all. I saw the same great view reflected back in the clear waters of the lake around me. Here's the flip side of the solar halo, almost as spectacular as the original in the sky. -- Margy