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radar Europe area satellite imagery UK High resolution forecast map layers - Precipitation type, Visibility, Total cloud, Cloud layers, Fog Produced by the Met Office. Met Office and the Met Office logo are registered trademarks. © Crown Copyright 2024, Met Office 02765

in satellite imagery extending northeast from Katla, although now partially obscured by upper cloud layers. This position verifies well with model forecasts. Earlier Airep report of Ash cloud considered to be unlikely given upper wind trajectories, available imagery, and forecast model Ash plume data. © Crown copyright Met Office

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of clouds, exponentially distributed in size. First population always present: L = 160m Second population depends on organisation: L = 760m Convection Working Group Humphrey Lean Kirsty Hanley Km and sub-km scale UM over Southern UK 1500m 500m 200m 100m www.metoffice.gov.uk © Crown Copyright 2017, Met

.......................................................................................................... 10 3.7. Cumulonimbus Cloud .......................................................................................... 11 3.8. Icing ..................................................................................................................... 12 3.9. Flight level

occupied by cloud as diagnosed by the model cloud scheme. This is for the whole atmosphere column as seen from the surface or the top of the atmosphere. Fraction of horizontal grid square occupied by cloud in the high-level cloud height range; from 5,574m (~18,000ft) to 13,608m (~44,500ft). A fraction

rainfall_rate_from_ convection_max- PT01H rainfall_rate_from_ convection_max- PT03H rainfall_rate_from_ convection_max- PT06H rainfall_ accumulation-PT01H Fraction of horizontal grid square occupied by cloud as diagnosed by the model cloud scheme. This is for the whole atmosphere column as seen from

1300 UTC Jan 27 2016 annotated satellite image Issued 1350 UTC on Wednesday 27 Jan 2016 LOW CONFIDENCE- Ash may extend further west in Denmark Strait but cloud cover means it cannot be discerned by satellite imagery. EXERCISE HIGH CONFIDENCE- VA clearly discernible in satellite imagery. Verified

Volcanic Ash – T+0 annotated satellite image Issued 1500 UTC on Tue 05 Aug 2014 TEST TEST TEST TEST TEST TEST MEDIUM CONFIDENCE - Thick cloud obscuring any ash layers BUT – VA was discernable in this location on earlier images HIGH CONFIDENCE- IMO radar discerning VA to FL360 near Katla and VA

A combination of rain, showers, strong winds, and lower-than-average temperatures will be the main features as we move from Friday into Saturday. Friday will see cloud and rain, at times heavy, affecting eastern Scotland and north-east England. Elsewhere, the weather will be a mix of sunshine