Londoners on Tuesday saw a rare “black hole” type cloud form over the capital on Tuesday and people took to Twitter.
Any cloud experts around? What the hell is this floating over south London?! pic.twitter.com/oRT2iJkrii
— Alexa Brown (@alexabrown) June 4, 2019
According to the Met Office, “Asperitas is a distinctive but relatively rare cloud formation that takes the appearance of rippling waves.
“These wave-like structures form on the underside of the cloud to make it look like a rough sea surface when viewed from below.”
This Twitter user likened the grey sky as a “black hole.”
— sammie (@xxxsammiexxxxx) June 4, 2019
Exactly how the clouds are formed is unknown however, unstable atmospheric conditions are at times associated with the aftermath of a thunderstorm.
A London firefighter said on Twitter, “The cloud formation over London is incredible. I would love to know what type they are.
Antonia added, “They look like peaks of whipped meringues.”
The cloud formation over London is incredible.
I would love to know what type they are.
— Antonia (@Flaminhaystack) June 4, 2019
— Iain (@IainMellis1) June 4, 2019