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yellow Warnings have been issued for the United Kingdom

Extended Outlook

Extended outlook forecast

Issued: 2047 on Sun 03 May 2015 UTC

Issued by the Met Office, on behalf of the Maritime and Coastguard Agency

Valid from 2100 on Tue 05 May 2015 UTC until 2100 on Fri 08 May 2015 UTC

Cullercoats

On Tuesday evening Low 976 centred near western Scotland will dominate the weather conditions around UK waters. The low will be slow moving with little change during Wednesday, before moving to Forties 987 by early Thursday. High 1023 will be centred over France with a ridge extending northwestwards to western Sole. The low will move to southern Norway and fill 994 by midday. On Friday the low will move away eastwards, with a broad ridge of high pressure extending southeastwards across the UK. Easterly gales or severe gales will cover Viking and Fair Isle until the early hours of Wednesday morning. Later on Wednesday southwesterly gales may develop across waters south of 55 north, before decreasing to strong during Thursday morning. Later on Thursday northerly gales may affect Viking, North Utsire and Fair Isle until Friday morning. By the end of Friday strong winds will be confined to waters close to Norway

Niton

On Tuesday evening Low 976 centred near western Scotland will dominate the weather conditions around UK waters. The low will be slow moving with little change during Wednesday, before moving to Forties 987 by early Thursday. High 1023 will be centred over France with a ridge extending northwestwards to western Sole. The low will move to southern Norway and fill 994 by midday. On Friday the low will move away eastwards, with a broad ridge of high pressure extending southeastwards across the UK. Westerly or southwesterly gales will affect all waters, and may increase to severe gale strength across Sole, Lundy, Fastnet and Shannon between midnight and early afternoon on Wednesday. Winds decreasing with gales becoming confined to Thames and Dover by early Thursday, and here winds becoming strong by the end of the night. Southeasterly gales may develop western Fitzroy on Thursday morning. On Friday strong winds will become confined to Sole and Shannon

Portpatrick

On Tuesday evening Low 976 centred near western Scotland will dominate the weather conditions around UK waters. The low will be slow moving with little change during Wednesday, before moving to Forties 987 by early Thursday. High 1023 will be centred over France with a ridge extending northwestwards to western Sole. The low will move to southern Norway and fill 994 by midday. On Friday the low will move away eastwards, with a broad ridge of high pressure extending southeastwards across the UK, with an anticyclone centred just west of Bailey 1026 Friday afternoon. Gales or severe gales will affect all waters on Tuesday night and through into Wednesday. By the end of Wednesday northerly gales will become confined to waters north of 55 north except Fair Isle. Winds slowly decreasing with a chance of northerly gales later on Thursday. Winds generally continuing to decrease overnight and during Friday strong winds will be confined to Shannon and Fair Isle

Extended outlook overview

The extended outlooks are issued once a day, at 2300 GMT and cover the next 3 to 5 days.

For the extend outlooks the waters surrounding the British Isles are divided into three areas; Cullercoats, Portpatrick and Niton. These three areas reflect the coverage areas of the UK's Navtex transmitters, which overlap in some areas.

The extended outlook forecast contains details of the likelihood of gales or storms, a general synopsis and a general forecast for the area of coverage of each Navtex transmitter.

In the UK, the Maritime & Coastguard Agency (MCA) is responsible for the provision of Maritime Safety Information (MSI) to ships at sea, which includes the broadcast of warnings and forecasts. The Met Office initiates warnings and prepares routine forecasts for dissemination on behalf of the MCA.

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