cirrus

http://www.rmets.org/sites/default/files/pdf/presentation/20110316-haywood.pdf Apologies if already covered elsewhere (I tried searching but no obvious hits). Although a lot of the science goes over my head, it gives step-by-step analysis including tools used, which I assume could be useful to...

The halo (photographed in Bangkok) is probably a circumscribed halo (at 22 degrees) that is due to a predominance of longer hexagonal crystals that are falling horizontally. The feature that I do not understand is the dark concentric circular arc at four-five o'clock at about 31 degrees. It...

via: http://www.westernmorningnews.co.uk/bird-plane-mattress-Strange-flying-carpet-cloud/story-22011903-detail/story.html The straight-edged rectangular formation was seen in the sky in Exeter, Devon - and images were quickly posted on social media. One picture of the rhombus-shaped cloud was...