Circumzenithal arc witnessed over Lancashire this afternoon October 24th, 2016 Pat Regan Latest News Shares Comments A circumzenithal arc appeared high over Hesketh Bank farmlands this afternoon. The Circumzenithal arc is also know as the ‘Upside down Rainbow’, for obvious reasons. This attractive phenomenon forms when sunlight refracts through horizontal ice crystals at such an angle that the light enters the crystal through its flat top face and exits through a side prism face, causing the distinctive upside-down rainbow effect. These arcs are linked to cirrus clouds. More data here… http://www.metoffice.gov.uk/learning/learn-about-the-weather/weather-phenomena/circumzenithal-arc They may occasionally be seen when sundogs are in the sky, yet can often be missed due to their high altitude. See also… http://www.otsnews.co.uk/sun-dog-witnessed-over-ainsdale/ Pat Regan © http://pat-regan.blogspot.co.uk/ Submit News Contact us with your community, business or sport news. Phone 07581350321 Email [email protected] Facebook https://www.facebook.com/Otsnews-Southport-1575528676012039/ Twitter www.twitter.com/onthespot_news Breaking local news as it happens, searchable archives with photographs, the ability to instantly comment on news articles – there are so many advantages to OTS (Onthespot) News. If you want your news read locally online then send it to [email protected]– relying only on the newspaper is to restrict yourself to an ever reducing audience. Related Comments comments!