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Extended Outlook

2100 UTC Tuesday 28 June to 2100 UTC Friday 1 July 2016
Issued by the Met Office, on behalf of the Maritime and Coastguard Agency, at 262058 UTC

Cullercoats

At the start of the period low pressure is expected to be centred just south of Iceland, 993. It will remain slow moving for much of Wednesday, before moving slowly southeast to lie to the northwest of Scotland, 992, by Thursday evening. The low will remain slow moving through Friday. On Tuesday evening a small low 1003 over the southwest of England will move northeastwards and fill over the North Sea by Wednesday morning. On Wednesday a new developing low will move quickly northeast from the south of Shannon, into Irish Sea and then across into the North Sea, 998, by midnight Thursday. The low then moves to lie over Scandinavia on Thursday evening. Strong winds are expected to develop across Cullercoats overnight on Tuesday into Wednesday, with a risk of gales through the English Channel. Strong, mainly southwesterly, winds will continue for much of the period, with a further risk of southwesterly gales across southern areas on Thursday

Niton

At the start of the period low pressure is expected to be centred just south of Iceland, 993. It will remain slow moving for much of Wednesday, before moving slowly southeast to lie to the northwest of Scotland, 992, by Thursday evening. The low will remain slow moving through Friday. On Tuesday evening a small low 1003 over the southwest of England will move northeastwards and fill over the North Sea by Wednesday morning. On Wednesday a new developing low will move quickly northeast from the south of Shannon, into Irish Sea and then across into the North Sea, 998, by midnight Thursday. The low then moves to lie over Scandinavia on Thursday evening. Strong winds are expected to affect most areas on Tuesday evening, with a risk of gales for areas north of 48 North. Strong, mainly west or southwesterly winds will continue throughout, with a risk of gales at times across northern areas

Portpatrick

On Tuesday evening low pressure is expected to be centred just south of Iceland, 993. It will remain slow moving for much of Wednesday, before moving slowly southeast to lie to the northwest of Scotland, 992, by Thursday evening, remaining slow moving through Friday. On Tuesday evening a small low 1003 over the southwest of England will move northeastwards and fill over the North Sea by Wednesday morning. On Wednesday a new developing low will move northeast from the south of Shannon, into Irish Sea, and then into the North Sea, 998, by midnight Thursday. The low then moves to lie over Scandinavia on Thursday evening. Strong, mainly west to southwest winds are expected to affect all areas on Tuesday evening with a risk of gales in Lundy, Fastnet and Rockall. Strong, mainly west or southwesterly winds will continue throughout, with a risk of gales Lundy, Fastnet and Shannon on Wednesday, then Shannon, Rockall and Malin on Thursday and Friday

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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