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Volcanic Ash – T+0 annotated satellite image Issued 0900 UTC on Wed 20 Mar 2013 TEST TEST TEST Possible ash below high cloud. LOW TEST TEST TEST Thick cloud layers. HIGH © Crown copyright Met Office
Areas of expertise Moist convection in the atmosphere. Boundary layer meteorology. Large-eddy simulation and cloud resolving modelling. Publications by Steve Current activities Steve has now returned to the scientific interest (which he has had since his PhD) in the impacts and representation
High-pressure has been largely dominant over the UK in recent days, bringing a good deal of dry, fine weather and some sunny spells. Whilst the fine weather will continue in the south on Saturday, a low-pressure system will introduce cloud and outbreaks of rain for much of Scotland and Northern
Volcanic Ash – T+0 annotated satellite image Issued 1015 UTC on Fri 18 May 2018 LOW CONFIDENCE- Areas of cloud may soon obscure forward edge of plume HIGH CONFIDENCE- Large gaps in cloud means VA is clearly visible in satellite imagery © Crown copyright Met Office
and so the wind speed within the cloud. Figure 11 Wind profile generated by the Cobbacombe Cross Doppler radar data Dual Polarisation Figure 12 Schematic of dual polarisation measurement A dual polarisation radar can retrieve more information about the nature of the target being observed. It does
Volcice Exercise – 1230 UTC annotated satellite image Issued 1230 UTC on Tue 15 Dec 2015 EXERCISE LOW CONFIDENCE- VA plume observed by C-band radar in Keflavik rising to 7km, but cloud covering the volcano LOW CONFIDENCE- Cloud to the north of the volcano is masking any ash emitted EXERCISE EXERCISE © Crown copyright Met Office
EXERCISE EXERCISE EXERCISE VOLCICE Volcanic Ash T+0 annotated satellite image Issued 1000 UTC on Fri 12 Jun 2020 LOW CONFIDENCE ✂ Meteorological cloud is inhibiting view of ash in satellite imagery HIGH CONFIDENCE ✁ IMO ground-based radar detected ash cloud to height of 18km © Crown copyright Met Office
Volcanic Ash – T+0 annotated satellite image Issued 1550 UTC on Fri 19 Oct 2018 VOLCICE EXERCISE LOW CONFIDENCE- Meterological cloud in vicinity of Kverkfjoll partially obscuring view of ash cloud. LOW CONFIDENCE- PIREP reported VA at FL180 at 19/1530 UTC. Ash not discernible on imagery. VOLCICE EXERCISE © Crown copyright Met Office
and dry conditions across much of the UK, with sunny spells developing through the day. Inland areas may see some convective cloud build-up during the late morning and afternoon, but this is expected to be short-lived. Northern and northwestern Scotland will be cloudier, with showery rain likely
showers by the time it reaches northern Wales and northern England later in the afternoon. Blustery showers will follow into northern Scotland, where it will remain windy throughout the day. Elsewhere, conditions will be predominantly dry with sunny spells and variable cloud cover. There is a slight
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