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What Are F214, F215, F415, and F424? These forecasts are part of the UK’s regulated aviation weather services, designed to support safe and efficient low-level flight operations: F215: A graphical low-level significant weather chart showing areas of poor visibility, low cloud, and other weather

areas, but cloud in the south-west spread to other areas through the afternoon. The 2nd saw some brightness in the south, but other areas were cloudy, with patchy rain or drizzle over the north at times. The 3rd was again generally cloudy and mild, but with a few brighter spells, and also patchy

). 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

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the north, spread steadily southwards, reaching East Anglia and the south-east by evening, with scattered showers developing in northern and central parts. 8th to 18th There was some sunshine on the 8th, but morning showers in the north-west. Cloud increased from the west during the course of the 9th

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

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

between the 10th and 12th, and the 10th was a day of sunshine and showers for most, the showers heavy and thundery in some places although other places stayed dry. Showers were generally fewer on the 11th, though a few were still heavy especially in the east. The 12th saw some patchy cloud bubble up

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

into Monday night, cloud and more organised showers or rain will affect central, western, and southern Scotland, as well as northern England. Elsewhere, showers will become increasingly focused towards western coasts, while winds slowly begin to ease. Temperatures will be at or slightly above average