Some rare and unusual rainbow-colored clouds surprised onlookers as they brightened up the skies over the Dublin and Belfast areas in Ireland earlier this week, just ahead of a big storm.
The breathtaking display was also seen in parts of Britain but is something rarely seen quite so far south.
The amazing clouds, technically called polar stratospheric clouds, usually occur at high latitudes, in places like Scandinavia, Iceland, Alaska and Northern Canada.
The clouds that display the pastel colors of the rainbow are formed high in the atmosphere, at heights of up 9 to 15 miles. The colors are created as crystals are formed at temperatures of around -121F.
The clouds are normally associated with high winds - and these seemed to usher in Storm Henry. The country's southwest region was battered with winds of between 40 and 50 mph and gusts of between 70 and 80 mph.