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methods for convective-scale resolution versions of the Unified Model in a NWP-based nowcasting system for forecasts on timescales of 0–6 hours ahead. Nowcasting systems have traditionally used methods of localised analysis and extrapolation of observational fields such as cloud and precipitations

more cloud and northerly winds sees more subdued temperatures for most.   Next week Northerly winds will bring temperatures down further from Monday, with highs only likely to reach the low teens Celsius in many areas. Associated with this will be generally more unsettled weather, with showers

Areas of expertise Boundary-layer turbulence Cloud parametrization Microphysics Mid-latitude cyclones Publications by Ian Boutle Current activities Ian is currently leading the work to implement physical parametrizations from the Unified Model into LFRic, building on previous experience undertaking

work has included development of an inversion technique (InTEM) for estimating volcanic ash emissions using a Bayesian method, dispersion modelling and satellite observations. In addition, she has implemented in NAME a parametrization to represent the lateral spread within volcanic ash umbrella clouds

morning showers along the east coast. The 29th was sunny again following another cold night with a minimum of -2.1°C at South Newington (Oxon). A band of cloud and light rain moved slowly south-eastwards on the 30th followed by sunshine and showers. Wales diary of highlights September started

of sunshine from the 22nd to 27th inclusive, with warm days and cold nights. During this spell, slowmoving fronts often brought more cloud and some rain to north-western Britain. A northerly outbreak brought wintry showers to eastern areas on the 28th, followed by mostly dry but relatively cloudy weather

and parts of Scotland will gradually push to all areas as low pressure moves in from the west. Cloud and rain, which could be heavy at times, will affect into Northern Ireland and southwestern parts of England and Wales by Saturday evening, with rain continuing to spread eastwards overnight, easing

This page displays airfield climate statistics for 48 UK airports including occurrences of Low Visibility Procedures, temperature, low cloud base, significant weather, visibility and wind.

for each statistic and the period of observation is displayed on each plot individually.  The Charts Occurrence of LVPs This plot shows the percentage occurence of Low Visibility Procedures (LVPs) at each airfield by month. The LVP criteria* is met when cloud base falls below 300 feet (at least 5

that this is a 0.25 degree data set. Icing Severity The new icing severity forecasts, provided for FL060, FL100, FL140, FL180, FL240 and FL300, brings improved algorithms and incorporates temperature, cloud fraction, vertical velocity and cloud liquid + cloud frozen water content. Instead

Monday will see a marked change in conditions across the UK, with cloud and areas of rain moving east-north-eastwards through the day. Rainfall may be heavy at times, particularly across Northern Ireland, Scotland, and northern England, where there is a risk of thunderstorms. Notably, northeast