Rounded, smooth, globular ‘pouches’ clumped together and hanging underneath the base of a cumulonimbus cloud. They often form on the underside of an anvil and are accompanied by thunderstorms. The name translates to mamma and means ‘mammary cloud’.

Altostratus (As)

One of the 10 characteristic cloud types (or cloud genera) recognised by the International Cloud Atlas. Its name comes from altum (height) and stratus (spread out). It appears as a greyish or bluish sheet of cloud, partly or totally covering the sky, but with parts sufficiently thin to at least vaguely reveal the sun.

Larsen C: Giant iceberg breaks off Antarctic peninsula

On 12th July, satellite data confirmed the ‘calving’ of a trillion-tonne, 5,800 km2 iceberg – one of the largest icebergs on record, more than a quarter the size of Wales - from the Larsen C ice shelf on the Antarctic peninsula.
Larsen C ice shelf - a floating mass of ice hundreds of metres thick which is attached to a huge, grounded ice sheet - is now 12% smaller in area than before the split and is at its lowest extent ever recorded, dramatically changing the Antarctic landscape.  It follows previous collapses of Larsen A ice shelf in 1995 and Larsen B in 2002.

Weather Photographer of the Year finalists announced – vote for your favourite!

We are now seeking votes for the ‘Public’s Favourite’ photograph from our shortlisted entries for Weather Photographer of the Year 2017. There are nearly 50 stunning photos to choose from depicting weather in its widest sense - dramatic in what they depict or because of the story they tell of the impact of weather. They range from weather phenomena such as clouds, lightning, rain, fog or snow through to the impact of weather on humans, cities and the natural landscape.

All wining entries will be announced in the coming months