Alert Abbotsford News reader June Born sent us this photo of a hole-punch cloud seen in the skies over the city early Monday afternoon.
The same cloud was spotted over
Ed Wiebe, Scientific Assistant at UVic explains the background on Twitter. The formation is known as a sa国际传媒渇allstreak holesa国际传媒� in which a large gap, usually circular, appears in cirrocumulus or altocumulus cloud.
Wiebe explains that the fallstreak hole, also known as a sa国际传媒渟kypunchsa国际传媒� is formed when the water in the centre of the cloud drops below freezing and enters a supercooled state but is not yet frozen, and begins evaporating away from a disturbance in the centre.
Three views of the same phenomenon, three and thirteen minutes after the first image. This is a fallstreak hole. Supercooled liquid water in the clouds rapidly changes to ice because of a disturbance near the centre of the hole. The disturbance spreads. 1/3
sa国际传媒� Ed Wiebe (@edwiebe)
Several other people posted photos of the weather phenomenon on social media.
havensa国际传媒檛 seen this before in Abbotsford
sa国际传媒� Letty Rowley (@crashovertime)
Less prominent than this morning, but another fall streak hole in the clouds
sa国际传媒� Curtis Reimer (@_curtisreimer)
