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CAA Verification Report CAA service performance: May 2025 TAF performance Objective: To ensure airlines and pilots have accurate airport forecasts for planning purposes. The Met Office provides verification of TAFs for UK Civil airports against airport observations (METARs and AUTO METARs

Investigating driving factors for the UK-average temperatures in May 2024: A study of the impact of local sea surface temperatures and of climate change Ségolène Berthou, Rebecca Holliday, Jenny Pirret, Emily Wallace www.metoffice.gov.uk © Crown Copyright 2024, Met Office © Crown copyright 2020

of the Advanced Global Atmospheric Gas Experiment (AGAGE) program. The global tropospheric background concentration of SO2F2 has increased by 5 +/- 1% per year from similar to 0.3 ppt (parts per trillion, dry air mol fraction) in 1978 to similar to 1.35 ppt in May 2007 in the Southern Hemisphere

. This may lead to errors if certain parts of the grid are more frequently sampled than others. However because of the large travel distances and therefore time elapsed between emission in these large grids and measurement the impact of this will be small. Also by only reporting emissions within NWEU

Met Office Hadley Centre Climate Science Roadmap 2020-2030 25 May 2020 1 Introduction ✓ Motivation for this document • Following the new Met Office Corporate and People Strategies and the new Met Office Research & Innovation Strategy we set out the path for getting ourselves ready for a changing

Exceptionally wet weather, 21 to 23 May 2024 From 21 to 23 May, parts of England, southern and eastern Scotland and North Wales experienced exceptionally wet weather from a slow-moving weather front associated with an area of low pressure centred off the east coast of the UK. Over 50mm of rain fell

measure Average Frequency (1 cycle = 11 years) Scale Descriptor Duration of event will influence severity of effects Solar radiation storms S5 Extreme Biological: Passengers and crew in aircraft on certain routes may be exposed to increased radiation levels. The increase depends on flight path

The early May Bank Holiday will be very warm and sunny for many before a change to fresher conditions and the chance of showers arrives for the rest of the week.

Bank Holiday Monday will see a continuation of the very warm and sunny weather that much of the UK has experienced during the bank holiday weekend. The exceptions to the sunny story being around some Irish Sea coasts where a chilly mist may come in off the sea at times, and cloudy skies over

features connected with the 10 main groups of clouds are listed at the end of this publication. Observers may find this a useful guide when considering which clouds may be present, or when eliminating improbable clouds, especially during darkness. In some meteorological messages, clouds are identified