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AS Altostratus ASR Altimeter setting region ATD 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

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

the Ochils likely to stay dry and sunny. Chance of cloud-free hill tops above 800m: 30% in north, 80% in south Low Cloud and visibility: Frequent cloud above 600-750m in north, more persistent over highest tops, but well broken in south. Away from cloud and snow showers visibility mostly good, mainly

of thunder and some blizzard and whiteout conditions. Access roads also expected to be badly affected. Fewer showers reaching Loch Rannoch and Creag Meagaidh than elsewhere. Chance of cloud-free hill tops above 800m: 30% in north, 60% in south Low cloud and visibility: Frequent cloud at 600-750m

, 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

of thunder and some blizzard and whiteout conditions. Access roads also expected to be badly affected. Fewer showers reaching the Great Glen. Chance of cloud-free hill tops above 800m: Ranging from 20% in north, to 40% in far southeast. Low cloud and visibility: Frequent cloud at 600-750m in north

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

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

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

. 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