- By Kate Scotter
- BBC News, East of England
Rainbow-colored clouds have been spotted across the East of England for the first time in seven years, a meteorologist said.
BBC Look East weather presenter Dan Holley said nacreous clouds are rarely seen in the UK because of the special conditions required.
They often form more than 20km (12 miles) above ground level, far above regular clouds.
They tend to appear most clearly at dawn and dusk, Holley added.
The clouds, sometimes called “mother of pearls” because of their color, were captured on camera in Norfolk, Suffolk, Essex, Cambridgeshire, Buckinghamshire, Bedfordshire, Northamptonshire and Hertfordshire.
“They are rarely seen this far south and are usually in polar regions where air temperatures in the stratosphere can reach near or below -80C (-112F),” Mr Holley said.
“Occasionally, cold air at this altitude can move a little further south of the UK and if conditions are favorable this can encourage the appearance of nacreous clouds.”
“The last time nacreous clouds were seen this widely was in February 2016,” he added.
These clouds have been spotted elsewhere in the UK, including in Edinburgh, Aberdeen, Durham, Lincoln and Wolverhampton.