Dreaming of a white Christmas

Now it’s December, one of the questions we are often asked as meteorologists is “Will it be a white Christmas?” The first thing to clarify, is what exactly is being asked – do you want to know if anywhere in the UK will see a single snow flake or are you envisaging streets and roofs with a dusting of the white stuff when you wake up on 25 December. 

New cloud type spotted over Snowdonia

These dramatic clouds are the newest cloud type in over 50 years and were spotted over Snowdonia, UK this weekend. 

Asperitas formations are incredibly rare and look like rough, sea waves in the sky. The base of these clouds is usually between 4,000 - 10,000ft (1 – 3km) and as with all cloud names, they are derived from Latin with aspero meaning ‘roughness’.  At first glance, or when doing research, they may appear to fall into the undulatus clouds category, however they are more chaotic and have less horizontal structure compared to undulatus clouds.