A rare phenomenon in the sky over southern Vancouver Island yesterday had social media abuzz.
People were posting pictures of what looked like a perfectly circular cloud.
Environment Canada meteorologist, Armel Castellan, tells us what it was:
"Well they have several names. The Latin "cavum" is the official name, but most of the time we call them fallstreak clouds, or hole punch clouds, because they kind of look like somebody has taken a cookie cutter and removed a section of the cloud in a fairly round, circular shape."
Fallstreak clouds are formed when water droplets become "super-cooled" setting off a process where a circular part of the cloud turns to ice and falls as precipitation.
The strange circles were spotted over Greater Victoria, and Nanaimo -- and one over the Fraser Valley was so large Castellan says many might not have noticed.