Has anyone else seen or photographed these rare cloud formations ?
One of my projects the past month or so was to review all the photo classifications on ASW. While doing this HUGE job I found I had a couple of these horse shoe vortex photos.
This on 25th October 2003 at the start of one of my best chase days ever:
I also saw others on 1st and 26th December 2005
Then just 2 months ago I observed two near each other in a field of fair weather cumulus:
Cropped version of two photos taken 7 seconds apart - they sure don't last long !