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• Dr Keith Williams

  Areas of expertise Model Evaluation Seamless modelling approach Understanding cloud processes Process-orientated metrics of model performance Publications by Keith Williams Current activities Keith heads the Atmospheric Processes and Parametrizations group. The group is responsible

• PowerPoint Presentation

  Q + DM rain evap RCBMF + no conv Q + DM rain evap + TKE + CP detrain No deep North Atlantic Popular choices PDF of hourly precipitation over the tropics RCBMF No deep Standard No deep RCBMF Reducing cloud base mass flux leads to a bimodal PDF Switching off deep convection entirely leads to too

• Met Office daily weather: Temperatures to peak into the mid 30s

  Tuesday begins with areas of cloud and showery rain, some locally thundery, affecting central and southern regions. These outbreaks will gradually move north-eastwards, allowing increasing amounts of hot sunshine to develop across much of England and Wales by the afternoon. Scotland and Northern

• Met Office daily weather: July kicks off with peak of current hot spell

  Tuesday will begin largely dry and bright across northwestern areas, with settled conditions prevailing. A band of cloud and scattered showers will stretch from the southwest approaches through Wales to southeastern Scotland and northeastern England. This band is expected to fragment through

• uk_monthly_climate_summary_202004pdf

  briefly in the far north, the 7th was sunny and dry apart from some cloud and a little light rain moving into the south-west,. The 8th was another dry, largely sunny day. The 9th and 10th continued very warm and sunny in the southern half of the country, and Treknow (Cornwall) had a minimum of 13.6

• uk_monthly_climate_summary_202004.pdf

  briefly in the far north, the 7th was sunny and dry apart from some cloud and a little light rain moving into the south-west,. The 8th was another dry, largely sunny day. The 9th and 10th continued very warm and sunny in the southern half of the country, and Treknow (Cornwall) had a minimum of 13.6

• NCIC Monthly Summary

  coastal counties. The 2nd was overcast for all parts too, with patchy rain or drizzle over the south-east, cloud breaking in the north-west later on. The 3rd was again cloudy, though remaining mostly dry, with cloud tending to break in southern areas during the morning. The 4th was brighter

• NCIC Monthly Summary

  elsewhere, and a spell of rain moving slowly and erratically east through the day with brighter skies then following from the west. The 3rd saw variable amounts of cloud, with showers affecting the north and the Midlands but becoming more restricted in extent later in the day. The south-eastern half began

• 02413-getmet-update-v5.pdf

  = calm. Wind direction is given in degrees true 8000 ‘Eight kilometres’ 9999 = 10 km or more; 0000 = less than 50 metres 7 Significant weather -SHRA ‘Light rain showers’ See present weather table on METAR (page 18) for details; NSW = No significant weather 8 Cloud FEW005 SCT010 SCT018CB BKN025 9

• 02413-getmet-update-v5pdf

  = calm. Wind direction is given in degrees true 8000 ‘Eight kilometres’ 9999 = 10 km or more; 0000 = less than 50 metres 7 Significant weather -SHRA ‘Light rain showers’ See present weather table on METAR (page 18) for details; NSW = No significant weather 8 Cloud FEW005 SCT010 SCT018CB BKN025 9