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yellow Warnings have been issued for the United Kingdom

Extended Outlook

2100 UTC Sunday 28 May to 2100 UTC Wednesday 31 May 2017
Issued by the Met Office, on behalf of the Maritime and Coastguard Agency, at 262006 UTC

Cullercoats

Sunday evening, a high is centred Hebrides 1020 moving slowly northeast. A low is situated over Finland 1006, influencing the far east of Cullercoats, and a thundery low 1016 covers much of Iberia moving slowly northwards towards the UK. By midday Monday the Iberian low is likely to be centred England 1011, moving northeast, with weak areas of high pressure north and south of this, and an Atlantic low centred 1003 North 61 West 21 just south of Iceland. By midday Tuesday, the UK low should have moved over to Scandinavia 1003, the low south of Iceland should have moved east across Portpatrick centred 1001 North Bailey, and high pressure will establish across Niton and southern UK. This high will build further across the UK, Cullercoats and Portpatrick by midday Wednesday, with the Bailey low moving quickly east and filling. Wednesday evening, deep low 988 will start approaching from the Atlantic. Strong winds for a time across Fair Isle Tuesday night

Niton

Sunday evening, a high is centred Hebrides 1020 moving slowly northeast. A low is situated over Finland 1006, and a thundery low 1016 covers much of Iberia moving slowly northwards towards the UK. By midday Monday the Iberian low is likely to be centred England 1011, moving northeast, with weak areas of high pressure north and south of this, and an Atlantic low centred 1003 North 61 West 21 just south of Iceland. By midday Tuesday, the UK low should have moved over to Scandinavia 1003, the low south of Iceland should have moved east across Portpatrick centred 1001 North Bailey, and high pressure will establish across Niton and southern UK. This high will build further across the UK, Cullercoats and Portpatrick by midday Wednesday, with the Bailey low moving quickly east and filling. Wednesday evening, deep low 988 will start approaching from the Atlantic. Strong winds possible across west Sole and Shannon Wednesday evening

Portpatrick

Sunday evening, a high is centred Hebrides 1020 moving slowly northeast. A low is situated over Finland 1006, and a thundery low 1016 covers much of Iberia moving slowly northwards towards the UK. By midday Monday the Iberian low is likely to be centred England 1011, moving northeast, with weak areas of high pressure north and south of this, and an Atlantic low centred 1003 North 61 West 21 just south of Iceland. By midday Tuesday, the UK low should have moved over to Scandinavia 1003, the low south of Iceland should have moved east across Portpatrick centred 1001 North Bailey, and high pressure will establish across Niton and southern UK. This high will build further across the UK, Cullercoats and Portpatrick by midday Wednesday, with the Bailey low moving quickly east and filling. Near gale possible for a time across Bailey, Hebrides, Fair Isle and Faeroes Tuesday afternoon and evening, and strong winds possible across Shannon Wednesday evening

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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