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level) vorticity is associated with increased hurricane activity. An increase in vorticity under climate change could c○ Crown Copyright 2016 12 Figure 9: Change in June to August mean wind shear (U at 200hPa - 850 hPa) from GCM (top) and downscaled (bottom) simulations under a RCP 8.5 scenario

satellite, was captured on 31 July 2023, relatively early in the lifetime of the cyclone, when it was still situated well to the south of the Ryukyu Islands and its wind speeds were near their peak, the equivalent of a Category 4 Atlantic hurricane. Credits: Image: © Crown copyright, Met Office, Data

of cloud top height Tropical cyclones Tropical cyclones at km-scale One year of DestinE fc Hurricane Irma (2017-09-05 00 UTC T+18) … improved mesoscale features & intensity but lingering slow propagation bias What have we learnt? Summary of BL parametrization • Orography • Degradation in NH wintertime

about the response to the Derry floods in August and ex Hurricane Ophelia. The Met Office science advisory group meeting was held in November which WW attended as an observer. Attendance at PAG-Reach in December and will be attending the Interdepartmental Met Office Strategy Group on 25 th January. WW

-RANGE WEATHER FORECASTS 7 CAMS aerosol optical depth Multi-layer smoke plumes 0.1 0.2 0.3 1 EarthCARE lidar backscatter Clear-sky Aerosols Clouds 15 August 2024 18 UTC ECMWF DestinE 4.4 km Ice cloud from Hurricane Ernesto Innovating in the exploitation of satellite data: towards all-sky, all-surface

. The August 1986 total was associated with ex-hurricane Charley, but all the others are associated with large-scale autumn or winter low pressure systems – with six of these ten events occurring in October. For the climate district of the Midlands the 3-day total of 67.2mm from 18 to 20 October 2023

height of 25 metres (82 feet) and winds reached hurricane force. The storms made conditions around the coastline exceptionally dangerous. The South West main line railway was severely damaged at Dawlish, Devon during the storm of 4 to 5 February, severing a key transport link to the South West

rainfall moves further eastward over the western Pacific, eventually dying out in the central Pacific.  The next MJO cycle begins.  Global weather impacts UK weather impacts The MJO creates favourable conditions for tropical cyclone activity, including Atlantic hurricanes.  The enhanced rainfall phase

.................................................................................................................. 46 11. Hurricane Gonzalo and its Extratropical Transition to a Strong European Storm............................51 12. Extreme Fall 2014 Precipitation in the Cévennes Mountains

and rainfall intensity 30 Heavy Rainfall 33 Snow 35 Sunshine 36 Wind 40 Mean sea level pressure 42 Relative Humidity 43 Sea Level 44 Significant Weather Events in 2014 46 Winter storms 2013/14 46 Ex-hurricane Bertha 10 to 11 August 2014 46 Warmest Halloween on record 46 Annex 1: Datasets 47 Monthly