In Depth – Understanding Weather (Met Office)

Understanding weather Air masses Atmosphere Clouds El Niño and La Niña High pressure or anticyclone Low pressure or depression Temperature differences Weather fronts Weather systems Wind Air masses Air masses are parcels of air that bring distinctive weather features to the country. An air mass is a body or ‘mass’ of air in which changes…

Weather Facts

Look in this section to find out more about UK and global weather, with some weird and wonderful facts and pictures, clouds and great pictures of weather in general!! You can download a powerpoint presentation below Cloud Images Learn what the different kinds of clouds look like with this powerpoint presentation about identifying clouds.Download Powerpoint…

Cumulus Clouds

Related Demonstrations and Experiments Clouds like those in the picture to the right are very commonly observed. They are called ‘cumulus’ because they have a heaped-up form (from the Latin cumulus, meaning ‘heap’). When their vertical extent is small, they are called ‘cumulus humilis’ or ‘fair-weather cumulus’. When their vertical extent is such that cloud…

Hooked Cirrus

Related Demonstrations and Experiments Cirrus Uncinus Have you ever noticed clouds like those in the upper part of the picture on the right? They are often seen when a warm or occluded front is approaching, generally 12 hours or more before the front’s precipitation arrives. The clouds are high in the troposphere, the layer of…

Cumulus Clouds and Fog

Related Discussion The picture shows a view south over Poolewe, north-west Scotland. It was taken at 14:00 UTC on 10 June 1963 and shows something unusual: coastal fog coexisting with cumulus clouds. For several days, an anticyclone had been centred near Iceland, giving sunny days and light north-easterly winds over Scotland. At low levels, air…

Fog

Fog is literally a cloud on the ground. It can cover vast areas and comes in a variety of types, just like clouds do. Fogs seen over the sea are different to those found in valley lowland areas and over mountains for example. Download fog fact file for printing, or have a look at our…

Contrails

Contrails are trails of ice crystals left in the wakes of jet aircraft. These condensation trails (known as ‘contrails’) sometimes persist for many minutes or even hours. On other occasions, they disappear quite quickly. Download contrails fact file for printing What is the Science behind Contrails? The exhausts of aircraft engines are hot and moist….

Clouds

Clouds Useful links   Download a Cloud Wheel or bookmark as a cloud identification chart. Experiments demonstrate clouds forming in the Classroom from Physics Education, 2012, Catalyst article on Cloud Seeding, Physics Review article on  Clouds, or have a look at our Experiments and Demonstrations page for experiments which demonstrate how clouds can look dark…