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Volcano Update 4 : No prolonged clearance until the weekend

Paul Hudson |13:03 UK time, Tuesday, 20 April 2010

It's another very frustrating day for airlines and passengers alike. As suggested on yesterday evening's update, the clearance across parts of the UK's airspace is proving to be very short lived, with more ash now pushing south-eastwards from Iceland across the UK.

The Met Office has confirmed by observation the extent of atmospheric ash, with balloon observations showing a 600 metre deep ash cloud at an altitude of 4km across parts of the UK. Despite several airlines reporting no problems during test flights, NATO F-16 fighter jets have reported engine damage when flying through the volcanic ash.

The latest projections, shown below, issued by the Met Office, show virtually all of the UK except the Northeast of Scotland contaminated by ash at 7am Wednesday morning.

volcano7.jpg

Upper winds are forecast to continue to blow from the Northwest for the rest of this week, indicating further plumes of volcanic ash heading towards the UK from time to time. Although further clearances are possible, the only significant prolonged clearance across UK airspace will not be until the weekend, when the wind switches to a West or Southwest direction.

Volcwind2.jpg

It's likely to be a very frustrating week for all involved.



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