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February 2009 British Isles snowfall

Prolonged snowfall in the UK and Ireland

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Through United Kingdom, London Underground and Paris

On 2 February, all London Buses were removed from service and there were severe delays on London Underground. All train services on Southeastern railway services between London, Kent and East Sussex were cancelled, as were those on Southern. South West Trains operated an emergency timetable with reduced service. Severe disruption occurred on First Capital Connect services, c2c services, First Great Western services, National Express East Anglia and Eurostar services from St Pancras International. In Ireland Dublin Bus routes were also severely disrupted while in England all bus services in Brighton, Crawley and Royal Tunbridge Wells had been severely disrupted.

Heathrow Airport was closed and British Airways cancelled all departures for a period. London City, Luton, Aberdeen, Bristol, Cardiff, Birmingham and Southampton were also affected. The Gatwick Express railway service was suspended. In Ireland on 5 February Dublin Airport was closed for a period to allow snow to be cleared from the runways, delaying flights. Flights at the airport were cancelled the following day.

Other effects included lost work time and disruption to education. Costs, mainly in terms of lost work time, are estimated to amount to around £1.2 billion, although this may be underestimated. The adverse weather conditions caused schools in some areas of the United Kingdom to close during 2, 3 and 5 February in the Midlands.

A winter storm swept across the south of England on 9–10 February bringing heavy rain and snow, which caused flooding in southern England. In France, Paris's Charles de Gaulle Airport was closed. In Aviemore, in the Scottish Highlands, a temperature of −18.4 °C (−1.1 °F) — according to the Met Office, was recorded; the lowest temperature recorded in the UK since 2003.

The maximum depth of the event was 55 cm (22 in) in Okehampton, Devon on 6 February. Other high amounts were Drybrook, Gloucestershire which had on 2 February 32 cm (13 in) reported in Leatherhead, 28 cm (11 in) in Purley, 25 cm (10 in) in Croydon, 20 cm (8 in) in Greater London, 30 cm (12 in) on the South Downs, 18 cm (7 in) in Brighton and 26 cm (10 in) on higher areas of Brighton.

The weather conditions severely disrupted the month's sporting schedule.

Synopsis

The February 2009 snowstorm followed an intense Sudden stratospheric warming in the previous month. These events often help to set up surface weather patterns that give rise to cold spells and snowfall in Europe. The snow then resulted from several factors starting on 1 February, the main component of which was a strong low pressure area near Spain. A strong high pressure area over Scandinavia created a tight pressure gradient between the two systems. A cold front also was tracking over Britain at this time. After passing through the region, cold air set in behind it, enhanced by an upper-level low over Germany. An inverted trough then extended out from the cold front, bringing precipitation to England. Late on 2 February, a surface-low pressure system, the actual snow storm, developed over the English Channel.

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