On Sat, 16 Jan 2016 23:15:12 -0000
"Bernard Burton" wrote:

Exceptional halo display at 1150z, LH parhelion almost too
bright to look at directly, a short section of the parhelic circle,
about 30% of the 22 deg halo, white, a brilliant circumzenital
arc and about 20% of the 46 deg halo, meeting the CZ arc,
well coloured but less bright than the CZ arc. At times during
the following 45 minutes both the LH and RH parhelia came
and went, sometimes very bright, and also the CZ arc appeared
faintly. Also at different times, the LH and RH parhelia at 120 deg
were briefly to be seen. This whole display seemed to be in fall
streak cirrus at or below the Ac clouds present at around 5 km altitude.

Fantastic! I've been looking for 50 years and only seen both the
120 degree parhelia once, and the full circumhorizon arc just once,
but not the same occasion. Do you have any photos?


Mike