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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

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

Volcanic Ash – T+0 annotated satellite image Issued 1600 UTC on Tue 14 Apr 2015 -ASH detected from Snaefellsjokull by Keflavik C-band Radar to FL100. HIGH CONFIDENCE- HIGH CONFIDENCE- -Bright returns on satellite imagery are meteorological cloud and NOT ASH. LOW CONFIDENCE- - -Pilot report of ASH at N60 W020 at FL300 at 14/1530Z. -Report not supported by satellite imagery or prevailing wind observations. © Crown copyright Met Office

Volcanic Ash – T+0 annotated satellite image Issued 0500 UTC on Wed 13 Aug 2014 TEST TEST TEST HIGH CONFIDENCE VA discernable on satellite imagery and for previous 5 hours LOW CONFIDENCE PIREP report of VA at FL260 but not discernable on imagery. HIGH CONFIDENCE VA discernable on Stornoway LIDAR FL240-FL280 MEDIUM CONFIDENCE VA discernable in this area 2 hours ago but currently obscured by cloud © Crown copyright Met Office

Volcanic Ash – T+0 annotated satellite image Issued 1530 UTC on Fri 13 Apr 2018 EXERCISE EXERCISE HIGH CONFIDENCE- Clear VA signal in IMO Mobile LIDAR to 20KM LOW CONFIDENCE- PIREP reported VA at FL220. Ash not discernible on imagery, and outside expected area from VA modelling. LOW CONFIDENCE- Areas of broken to overcast cloud north and northwest of Iceland is preventing identification of discernible ash. © Crown copyright Met Office

Volcanic Ash – 1000 UTC annotated satellite image Issued 1000 UTC on Thursday 28 February 2019 HIGH CONFIDENCE- Clear VA signal 28/0805 UTC to FL300 in mobile LIDAR LOW CONFIDENCE- Skies covered with low-level meteorological cloud in vicinity of summit, affording poor view of discernible ash. LOW CONFIDENCE- PIREP reported VA at FL320 at 28/0900 UTC. Ash not discernible on imagery. © Crown copyright Met Office

Volcanic Ash – T+0 annotated satellite image Issued 1600 UTC on Fri 15 Jun 2018 HIGH CONFIDENCE- VA signal 15/1445 UTC over Grimsvotn to FL140 in groundbased radar in eastern Iceland. LOW CONFIDENCE- Skies covered with low-level meteorological cloud in vicinity of summit, affording poor view of discernible ash. LOW CONFIDENCE- PIREP reported VA at FL320 at 15/1500 UTC. Ash not discernible on imagery. © Crown copyright Met Office

EXERCISE EXERCISE EXERCISE VOLCICE Volcanic Ash T+0 annotated satellite image Issued 1230 UTC on Fri 11 Sep 2020 HIGH CONFIDENCE ✄ PIREP report of VA plume visible to NE. HIGH CONFIDENCE ✁ IMO ground-based radar now measures VA plume 9-12km. x HIGH CONFIDENCE ✂ VA plume top more clearly discernible above meteorological cloud. © Crown copyright Met Office

cloud. HIGH CONFIDENCE- IMO radar confirms ongoing eruption. IMO radar and lidar observations confirm plume locations close to source. © Crown copyright Met Office

Friday will bring a mixed picture across the UK. A broad zone of cloud will stretch from west Wales through northern England and into the far south of Scotland, with pulses of rain moving north-eastwards through the day. Some of this rain may be heavy at times, particularly in areas exposed