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with this is the clouds are white and snow on the ground is white, so it can be hard to tell them apart. The second image aims to solve this problem. It uses five channels in the near-infra-red part of the spectrum to construct an image in which the snow can be differentiated from the cloud. Snow lying

Herzog, this project aims to identify and quantify the dynamical processes associated with individual clouds that need to be considered in convective parametrizations. 3. Mass flux and beyond Led by Bob Plant, this project will provide a critical examination of parametrization methods that are based

-west stayed mainly dry. Most places had fewer showers on the 2nd, but showers became more frequent in the north-east from early afternoon. Cloud, mist and fog with light rain spread across the south and parts of the Midlands on the 3rd, with sunshine and showers in the north, the showers turning

A fallstreak hole (also known as a holepunch cloud) forms when part of the cloud layer forms ice crystals which are large enough to fall as a 'fallstreak'.

They form in clouds of supercooled water droplets, water below 0 °C but not yet frozen. These water droplets need a tiny particle, a nucleus, to freeze or to be cooled below -40 °C. Aircraft punching through this cloud layer can cause air to expand and cool as it passes over the aircraft wings or propeller. This change in temperature can be enough to encourage the supercooled droplets to freeze and fall from the cloud layer in this distinctive pattern.

Drizzle is a type of liquid precipitation consisting of very small droplets of water falling from low level stratus clouds.

In the UK we're very familiar with drizzle. Our prevailing winds from the Atlantic pick up lots of moisture, and therefore clouds, as they travel over the sea. To be classed as drizzle, droplets must be less than 0.5mm in diameter. These are larger than the droplets in the clouds, but smaller than

Areas of expertise Climate model development and evaluation Representation of ASM in general circulation models Influence of vertical and horizontal resolution in models Sensitivity of modelled climate processes and phenomena to physical parametrizations Stratocumulus and cumulus cloud microphysics

Weather Forecasting  - helping you to understand the facts. The Met Office holds the nation's weather and climate records. Our UK climate and weather statistics will give you summaries, climate figures and much more. Latest Met Office guides and information on climate change.   Cloud Types

If you are interested in clouds or thunderstorms, UK climate or weather extremes, this series of factsheets clearly describes and illustrates the processes involved.

These factsheets clearly describe and illustrate the processes involved in global weather and climate, providing the most up-to-date answers and information. 1. Clouds The current classification of clouds is based upon those originated by Luke Howard (1772-1864), a London pharmacist and amateur

Arrival Time Difference AUG August AUTO Automated METAR (produced with CAA approval outside normal operational hours) Return to top B BASE Cloud base BCFG Fog patches BECMG Becoming BKN Broken (5 to 7 oktas) BL Blowing BLW Below BR Mist BTN Between Return to top C C Degrees Celsius CAA Civil Aviation

, particularly over coastal areas and hills where it brings low clouds, drizzle and local hill fog. Judging from the number of isobars the gradient wind does not seem to be an issue but the complexity of the frontal system over the Atlantic indicates that conditions will deteriorate quickly