The truth about dragon scale clouds appearing in Hanoi sky signaling an approaching storm

Meteorological experts confirmed that the cloud image appearing on October 11 in Hanoi is not a dragon scale cloud. In the next week, Hanoi will not have any signs of storms or severe weather.

On October 11, images of what appeared to be dragon scale clouds in the sky over Hanoi appeared on social media . According to the article, this phenomenon is a forecast for an upcoming storm or other severe weather system.

Information appearing on social networks

SCREEN CAPTURE

This information after being shared attracted the attention of the online community, in which, many people expressed fear and said "should go back to their hometown to avoid the storm".

Commenting on the above clouds, the National Center for Hydro-Meteorological Forecasting said that according to the regulations in the World Meteorological Organization (WMO) Cloud Atlas and Vietnam's technical regulations, these are altocumulus clouds (Altocumulus translucidus), also known as Ac tr clouds.

Altocumulus clouds form in patches, curtains or layers of altocumulus, most of which are translucent, and represent the position of the sun or moon. In the early stages of formation, the clouds have a very regular shape, growing to an average length horizontally. Within the cloud, small particles are divided, arranged more or less evenly in a thin sheet or checkerboard shape.

Altocumulus clouds are composed largely of water droplets, since the transparency of the larger particles is very poor and when they separate they have sharp edges. However, at very low temperatures, ice crystals can form.

These clouds typically occur at different levels in the same sky and are sometimes associated with altostratus clouds. There is often fog just below the canopy or altocumulus between their particles, the meteorological agency said.

"Altocumulus clouds may form, at least in part, from a growing or thickening cloud layer or curtain, or from a splitting of a stratocumulus cloud layer, or from a transformation of a stratocumulus or nimbus cloud. Altocumulus clouds may also arise from the top of a dissipating cumulus cloud, when a stable layer of air is reached during the vertical development of a cumulus cloud," the meteorological agency informed.

Meanwhile, meteorologist Nguyen Lan Oanh confirmed that the image appearing in the sky of Hanoi on October 11 was not a mammatus cloud (dragon scale cloud as people often call it). According to observations, in the next week, Hanoi will have no signs of storms or severe weather.

Thanhnien.vn