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Volcanic Ash – 1315 UTC annotated satellite image Issued 1330 UTC on Tue 13 Dec 2016 LOW CONFIDENCE- Eruption site and downwind plume obscured by thick meteorological cloud layers. Further, due to very bad weather conditions the data from the radar is not very clear. IMO estimate the plume height to still be around 12KM. © Crown copyright Met Office

Volcanic Ash – 1530 UTC annotated satellite image Issued 1600 UTC on Tue 10 Nov 2010 EXERCISE HIGH CONFIDENCE- Well defined ash in satellite imagery. LOW CONFIDENCE- PIREP report of VA at FL380. Position obscured by upper cloud HIGH CONFIDENCE- VA plume observed by mobile radar rising to FL590 EXERCISE EXERCISE © Crown copyright Met Office

1900 UTC Jan 26 2016 annotated satellite image Issued 1915 UTC on Tuesday 26 Jan 2016 EXERCISE LOW CONFIDENCE- Pirep reports an area of ash to west of Katla but cloud cover in the area means we are unable to verify. HIGH CONFIDENCE- Ash plume clearly discernible in imagery extending northeast of Katla. EXERCISE EXERCISE © Crown copyright Met Office

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Volcanic Ash – 1030 UTC annotated satellite image Issued 1030 UTC on Tue 14 Mar 2017 LOW CONFIDENCE- Eruption site and plume obscured by dense layers of meteorological cloud. HIGH CONFIDENCE- IMO reports discernible volcanic ash from Katla at 08:30UTC. The plume has been seen from fixed radar rising to 18km +/- 0.8km. © Crown copyright Met Office

Volcanic Ash – T+0 annotated satellite image Issue 0730 UTC on Sun 17 Aug 2014 TEST TEST TEST HIGH CONFIDENCE TEST IMO radar reports VA FL300-FL370 LOW CONFIDENCE TEST PIREP of VA at FL280 but not discernable on imagery due to cloud obscuration HIGH CONFIDENCE TEST VA discernable on satellite imagery © Crown copyright Met Office

Volcanic Ash – T+0 annotated satellite image Issued 1030 UTC on Tue 09 Jan 2018 EXERCISE VOLCICE LOW CONFIDENCE- VA suggested by model winds and plume, however hard to discern due to cirrus cloud HIGH CONFIDENCE- VA observed by radar to 24km near source, moving NE at 70kt. Plume visible on imagery. EXERCISE VOLCICE © Crown copyright Met Office

weather spread from the west on the 12th with isolated showers for the west and north-west. High pressure was further south from the 13th to 18th allowing a return to cloudy, unsettled weather. It was generally wet on the 13th with mist and low cloud hugging western coasts, and after a dry cloudy

, unsettled weather. It was generally wet on the 13th with mist and low cloud hugging western coasts, and after a dry cloudy start, more rain spread from the west on the 14th. It was dull and drizzly on the 15th, and mostly dry and cloudy on the 16th. Many areas started the 17th with some sunshine

Annex Plenary 6: Physical processes: parametrization and evaluation Aerosol-cloud interactions with double-moment 1400-1425 6a microphysics in cloud-resolving UM simulations Chair: Adrian Hill Hamish Gordon 1425-1440 6b Demistify - GASS fog intercomparison project Ian Boutle 1440-1455 6c Atmospheric