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Document Issue 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

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

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

of the atmosphere model to the surface model, where soil moisture has been shown to affect initiation. Much of the above is based on comparisons between model and observations for surface rainfall. It is possible that updrafts or clouds may compare better to observations and that the issue is related

matrix www.metoffice.gov.uk © Crown Copyright 2024, Met Office Heathrow D-1 and D0 Graphs LVP threshold: Visibility <600 m www.metoffice.gov.uk © Crown Copyright 2024, Met Office Gatwick D-1 and D0 Graphs LVP threshold: Visibility <600 m Cloud ceiling <200 ft www.metoffice.gov.uk © Crown Copyright

matrix www.metoffice.gov.uk © Crown Copyright 2025, Met Office Heathrow D-1 and D0 Graphs LVP threshold: Visibility <600 M www.metoffice.gov.uk © Crown Copyright 2025, Met Office Gatwick D-1 and D0 Graphs LVP threshold: Visibility <550 M Cloud ceiling <200 FT www.metoffice.gov.uk © Crown Copyright

of England and northeastern Scotland will experience cooler, cloudier conditions due to onshore breezes. These areas may also see brisk winds, especially in the far east, which could temper the warmth felt elsewhere. Friday night will bring a shift in conditions for parts of the country. Low cloud

interlude, it turned wet almost everywhere by the 10th. Around mid-month there was a spell of warm, humid, showery weather with thunderstorms especially in central, western and southern areas, and persistent low cloud along the northeast coast. There was a hot sunny spell especially over England from

Rebecca Murray-Watson and Emilie Fons Clouds in N2560 RAL3p3 simulations are more reflective than other GSRMs and CERES. Profile plot above shows additional ice in RAL3p3 – cloud fraction is largely similar to other GSRMs and UM CoMA9 and GAL9 First looks from WCRP global km-scale hackathon UM CTC 4.4