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• Thunderstorms and heatwave conditions – August 2020

  their flood risk, sign up for free flood warnings and keep up to date with the latest situation at Gov.uk, call Floodline on 0345 988 1188 or follow @EnvAgency on Twitter for the latest flood updates.” Warm and humid Frank Saunders added: “The hot weather is slowly subsiding now, with more cloud

• Met Office daily weather: A marked change as unsettled weather conditions dominate

  northern and western areas, allowing a widespread frost to develop from Wales northwards. Outlook for Tuesday Tuesday brings variable cloud and mostly dry conditions, with clear or sunny spells, particularly inland across western and central areas. Scattered showers will continue along windward

• Met Office daily weather: Weather warnings in place for heavy rain and winds

  . Elsewhere, expect variable cloud cover with some sunny spells and showers, which could be locally heavy in the south and west, with a risk of isolated cumulonimbus and thunderstorms. Gales are likely for exposed coasts in the north and east, and blustery winds will affect many inland areas at times

• Met Office daily weather: Weather warnings in place for heavy rain and winds

  . Elsewhere, expect variable cloud cover with some sunny spells and showers, which could be locally heavy in the south and west, with a risk of isolated cumulonimbus and thunderstorms. Gales are likely for exposed coasts in the north and east, and blustery winds will affect many inland areas at times

• ParaChute - Representing turbulence in models

  , and simultaneously capture cloud-scale motions and long-range atmospheric flows. At sub-km resolutions, turbulent motions are partially resolved. This means some parts of the flow can be represented directly by the dynamical equations of the model. Meanwhile finer-scale motions still need

• Microsoft PowerPoint - VOLCANIC ASH - NEPHANALYSIS.PPT

  Volcanic Ash – T+0 annotated satellite image Issued 1600 UTC on Tuesday 8 th April 2014 EXERCISE VOLCICE EXERCISE VOLCICE MEDIUM Extensive cloud cover obscuring VA. LOW HIGH IMO report Ash plume observed by ground radar – estimated plume height 17km - VA evident in imagery. Pirep – thin layers between FL150 and FL180 – not visible on imagery EXERCISE VOLCICE © Crown copyright Met Office

• volcanicash-nephanalysis-1481625429issue.pdf

  Volcanic Ash – 1015 UTC annotated satellite image Issued 1030 UTC on Tue 13 Dec 2016 HIGH CONFIDENCE- IMO report discernible volcanic ash from Katla at 08:37 UTC. The plume has been observed and is rising up to 12 km (+/- 1.5KM). The plume is seen by the fixed radar in Keflavík. LOW CONFIDENCE- Eruption site and downwind plume obscured by persistent meteorological cloud layers © Crown copyright Met Office

• volcanicash-nephanalysis-1544792514issue.pdf

  Volcanic Ash – 1145 UTC annotated satellite image Issued 1230 UTC on Friday 14 December 2018 HIGH CONFIDENCE- Clear VA signal 14/0900 UTC at FL100 in mobile LIDAR LOW CONFIDENCE- Skies covered with extensive meteorological cloud in vicinity of summit, affording poor view of discernible ash. LOW CONFIDENCE- PIREP reported VA at FL300 at 14/1030 UTC. Ash not discernible on imagery. © Crown copyright Met Office

• Microsoft PowerPoint - VOLCANIC ASH - NEPHANALYSIS

  Volcanic Ash – T+0 annotated satellite image EXERCISE VOLCICE 2014/05 EXERCISE VOLCICE 2014/05 Issued 1045 UTC on Wed 18 June 2014 EXERCISE VOLCICE 2014/05 EXERCISE EXERCISE MEDIUM Thick layers of cloud obscuring any VA to west of Iceland EXERCISE IMO- radar report of ash to FL200 HIGH LOW PIREP report of ash at FL180 not visble on satellite © Crown copyright Met Office

• Microsoft PowerPoint - VOLCANIC ASH - NEPHANALYSIS.PPT

  Volcanic Ash – T+0 annotated satellite image Issued 1500 UTC on Tue 12 Aug 2014 EXERCISE EXERCISE EXERCISE HIGH CONFIDENCE -VA discernable on imagery - VA plume observed to FL330 by IMO C-Band radar. LOW CONFIDENCE -PIREP report FL160 BUT not discernable on imagery. MEDIUM CONFIDENCE -Cloud obscuring ash layers -VA was discernable in that location on earlier images EXERCISE EXERCISE © Crown copyright Met Office