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in the north, with some heavy rain during late a ernoon on the 15th, and this rain cleared slowly south-eastwards on the 16th followed by sunshine and showers. The 17th was mainly sunny for most but it clouded over in the north-west with patchy rain and drizzle. A warm humid weather pattern then set

Areas of expertise Aerosol modelling Analysis of aerosol observations Parameterization of aerosols, radiation and clouds. Climate modelling Publications by Ben johnson Current activities Ben is a senior scientist in the aerosol modelling group, Earth System and Mitigation Science, Climate Science

challenging to predict exact solar radiation levels, particularly in longer range forecasts, because of the influence of clouds at local level. We all know how changeable Britain’s weather can be. Cloud cover can vary even over a distance of a few miles and on timescales of a few minutes. For example

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Volcanic Ash – T+0 annotated satellite image Issued 0900 UTC on Wed 20 Mar 2013 TEST TEST TEST Possible ash below high cloud. LOW TEST TEST TEST Thick cloud layers. HIGH © Crown copyright Met Office

Areas of expertise Moist convection in the atmosphere. Boundary layer meteorology. Large-eddy simulation and cloud resolving modelling. Publications by Steve Current activities Steve has now returned to the scientific interest (which he has had since his PhD) in the impacts and representation

High-pressure has been largely dominant over the UK in recent days, bringing a good deal of dry, fine weather and some sunny spells. Whilst the fine weather will continue in the south on Saturday, a low-pressure system will introduce cloud and outbreaks of rain for much of Scotland and Northern

and so the wind speed within the cloud. Figure 11 Wind profile generated by the Cobbacombe Cross Doppler radar data Dual Polarisation Figure 12 Schematic of dual polarisation measurement A dual polarisation radar can retrieve more information about the nature of the target being observed. It does

Volcanic Ash – T+0 annotated satellite image Issued 1015 UTC on Fri 18 May 2018 LOW CONFIDENCE- Areas of cloud may soon obscure forward edge of plume HIGH CONFIDENCE- Large gaps in cloud means VA is clearly visible in satellite imagery © Crown copyright Met Office

). Overleaf are a series of plots showing the Gerrity Skill Score in relation to the agreed performance measure for forecast Cloud Base and Visibility at airports in receipt of 9, 24 and 30 hr TAFs. Ronaldsway (EGNS) has now been included alongside the other ’9hr North’ airports, but it is not included