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front is slow-moving across southern England (the crosses on the front indicate that it is weakening). Despite becoming less active this front retains some of its characteristics. It is likely that significant amounts of cloud will be trapped under the ridge and this could be thick enough to generate

time. With surface flooding on the cards and the potential for rivers to burst their banks, Karen logs on to the Met Office website to double-check warnings she’s specified for nominated colleagues. All correct. Next, Karen receives a call from the dedicated Met Office Public Weather Service Advisor

, though the far north can expect a scattering of showers. Later in the day, cloud will increase across western Scotland and the Northern Isles, bringing occasional rain or drizzle. Winds will be a notable feature in the north, with gusty conditions especially to the lee of hills, while the south

at 10m above the ground • Atmospheric pressure at the station level and reduced to mean sea level • Pressure tendency and characteristic • Visibility • Amount of cloud • Type of cloud identified by observer • Height of cloud base • Present and past weather • Duration of sunshine • Short wave solar

Dr Keith Williams Keith is the Head of Atmospheric Processes and Parametrizations and conducts research into process-orientated model evaluation. Dr Paul Barrett Paul leads research into the representation of clouds and radiation Dr Martin Best Martin manages the research undertaken on land surface

) and a sharp or rumbling sound (thunder). Thunderstorms are associated with convective clouds and are most often, but not necessarily, accompanied by precipitation at the ground. Cumulonimbus clouds (Latin: cumulus – heap; nimbus – rainy cloud) Heavy and dense cloud, of considerable vertical extent

School of Earth and Environment INSTITUTE FOR CLIMATE & ATMOSPHERIC SCIENCE A new approach to quantifying aerosol-cloud radiative effect through process-based constraints on climate model parameters Kunal Ghosh Lea Provost, Leighton Regayre and Ken Carslaw (ICAS, University of Leeds), Jill S

, though the far north can expect a scattering of showers. Later in the day, cloud will increase across western Scotland and the Northern Isles, bringing occasional rain or drizzle. Winds will be a notable feature in the north, with gusty conditions especially to the lee of hills, while the south

current weather or environmental situations - for example, images of cloud-top height, fog coverage or ash clouds from a recent volcanic eruption. The image data can also be processed to form data-sets suitable for climate applications - for example, historical sea-surface temperature analyses

Thursday will bring largely settled conditions across the UK, with high pressure continuing to exert its influence. Most areas will remain dry, with the best of the sunshine expected in western regions. Elsewhere, cloud cover will gradually break up through the day, allowing sunny intervals