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and global scale modelling at kilometre scales Plenary 9: Sub-km modelling Delhi Model with Chemistry and Aerosol 1145-1200 9a Framework Jon Petch Chair: Kirsty Hanley Jayakumar Aravindakshan Pillai 1200-1215 9b Case study runs for fog and convection Stephanie Landman 1215-1230 9c Update on London

(Greater London, 170mAMSL) 1.2°C on 26th at Loch Glascarnoch (Ross & Cromarty, 269mAMSL) -1.8°C on 22nd at Port Henderson (Ross & Cromarty, 18mAMSL) 110.9mm on 22nd at White Barrow (Devon, 445mAMSL) 16.1hr on 8th at Lerwick (Shetland, 82mAMSL) 69Kt 79mph on 15th at Wight: Needles Old Battery (Isle

around Plymouth and Dartmoor experienced snowy conditions overnight. Overall the weather was unsettled, with a succession of frontal systems bringing rain and wind. By midmonth, several counties including London and Kent had already provisionally experienced their whole-month average rainfall

temperature around London. Instances of extreme high temperatures are rare and are associated with hot air brought from mainland Europe on south easterly winds accompanied by strong sunshine. Records include 35.4 °C at Saunton Sands, a site which is next to a large dune/heath area in north Devon

at London St James’s Park. There was generally a mix of sunny intervals and isolated showers, but with longer spells of rain in the north-west on the 23rd, giving 32.2 mm at Honister Pass (Cumbria). 24th to 31st High pressure spread from the south on the 24th and 25th and then stuck around for the rest

of the foregoing. “Data” means: the WAFS gridded and SIGWX data created by WAFC London and WAFC Washington as defined in ICAO Annex 3 – Meteorological Service for International Air Navigation; the OPMET data such as the METAR, TAF, SIGMET, volcanic ash advisory, tropical cyclone advisory and space weather

and proceedings relating to any of the foregoing. means: the WAFS gridded and SIGWX data created by WAFC London and WAFC Washington as defined in ICAO Annex 3 – Meteorological Service for International Air Navigation; the OPMET data such as the METAR, TAF, SIGMET, volcanic ash advisory, tropical

on day D+1 Daily minimum air temperature between 0900 GMT on day D-1 to 0900 GMT on day D It remained bitterly cold across the UK through Christmas. Maximum temperatures on Christmas Day widely remained well below freezing (even in central London, St James' Park recorded a maximum of only -0.4 °C

led to elevated numbers of calls to ambulance services. Flooding on the 13th around parts of London meant some roads around Neasden were partially blocked, there were delays on the Metropolitan line, and the northbound M1 was closed due to severe flooding. Heavy showers caused some flooding in North

21st/22nd the temperature fell no lower than 17.3 °C at London St James’s Park. There was generally a mix of sunny intervals and isolated showers, but with longer spells of rain in the north-west on the 23rd, giving 32.2 mm at Honister Pass (Cumbria). 24th to 31st High pressure spread from the south