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, FSA, EA; developed during and since the response to the Fukushima-Daiichi 2011 accident.  Volcanic ash modelling to support the Met Office’s role as the London VAAC; used during the eruptions of Eyjafjallajökull in 2010 and Grimsvotn in 2011 and continues to be developed.   Development and support

and areas for model improvement are prioritised through engagement with model user groups. Process Evaluation Groups and working groups address priority areas of research such as convection and ensemble spread. In addition, the team provides evaluation, development and support for the 300m London model and maintains and develops RAD Trialling Suites to make then more user friendly, robust and computationally efficient.

England and Wales overnight 26 to 27 December. The strongest winds were across Wales, south-west and southern England, where this was one of the most powerful storms of the year. Impacts Fallen trees caused disruption to rail services in the south-west, south-east and London, while Dover to Calais

, Brown et al. (2014) estimated a 20-year return level of 35.7°C for summer TXx in London, for 1961-90. Such rare daily events can occur either during short spells of hot weather associated with particular synoptic conditions (e.g. during 2018, McCarthy et al., 2019), or during an extended heatwave

”). For sea level rise, the primary scenario is defined by Network Rail to be the RCP4.5 95 th percentile, because UKCP18 does not contain sea level projections for RCP6.0. Transport for London (2021) uses the same guidelines. A review for ORR (Ferranti et al., 2021) concluded that whilst

of a turbulent spell of wet and windy weather for the UK, which was associated with a powerful jet stream. Two rare red warnings were issued for storm Eunice, with one being the first red warning issued for wind covering south-east England, including London (see Figure 1). Figure 1: The map of UK

, Hertfordshire and -2.4°C at Wych Cross, East Sussex – 8 to 10°C below average for the time of year. Even central London remained below freezing with a daily maximum of -0.1°C at St James’s Park. The maps below show daily minimum temperatures from 9 to 12 February 2021. The coldest night was 11 th /12th

is playing an increasingly crucial role in addressing environmental challenges and improving our understanding of weather systems and the changing climate, according to leading AI, climate and weather experts at a recent event in London. The event at County Hall in London showcased FastNet, a new

Team led by P. Bye. Two volumes: Initial assessment, Final assessment, published London, Easter Floods 1998 Independent Review Team, 1998 - copies available in Met Office Library. Easter 1998 floods, M.W. Horner and P.D. Walsh, Water and Environment Journal, 14, 415-418, 2007. Last updated: 25 October 2012 © Crown Copyright

not been consistent across the UK. London, East Sussex and Hampshire receiving 140% to 150% of average summer rainfall and the Isle of Wight exceeding 200%. However, much of the UK saw below average rainfall and when averaged out across the whole nation, the UK received 75% of its average rainfall