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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

, 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

History Version Issue Date Change Description Owner V1 April 2019 New document D Hardy V2 July 2021 Replacement of AIRMET with GAMETs D Hardy V3 May 2022 Removal of EURO Forecast precip rate, Forecast precip type, Forecast vis & Forecast total cloud weather may layers D Hardy © Crown copyright 2021

snow above around 500-600m. Becoming drier through the late afternoon and evening but with falling freezing levels the risk of some sleet or wet snow increase, down to around 300- 400m by the end of the day. Fresh easterly winds and feeling cold throughout. Chance of cloud-free hill tops above 600m

throughout. Chance of cloud-free hill tops above 600m: 80% initially, but becoming 30% through the morning as cloud thickens. Low cloud and visibility: Cloud bases largely above summits initially but thickening and lowering through the morning to become generally widespread above 500-700m. Visibility good

. Breezy conditions will persist, and temperatures will hover near or slightly below seasonal averages. Monday night will see a shift to drier conditions for many, though showers in the north will drift southward, concentrating along North Sea coastal counties. Cloud cover will increase in the far

to the formation of cumulonimbus clouds, towering, dense clouds capable of producing heavy rain, hail, and lightning. Lightning is a massive electrical discharge caused by the separation of positive and negative charges within a storm cloud. As the storm develops, ice particles and hailstones collide

the late afternoon and evening but with falling freezing levels the risk of some sleet or wet snow increase, above around 300- 400m by the end of the day. Fresh easterly winds and feeling cold throughout. Chance of cloud-free hill tops above 600m: 10%. Low cloud and visibility: Extensive cloud above

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

the air stable, rather than cold and moist. Low cloud and poor visibility may be very persistent under such conditions. • The record breaking temperatures of August 2003 were caused by a tropical continental air mass. Summer Winter Temperature: Very warm or hot Average Humidity: Relatively dry Rather