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Extended Outlook

Extended outlook forecast

Issued: 2025 on Wed 01 Jul 2015 UTC

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

Valid from 2100 on Fri 03 Jul 2015 UTC until 2100 on Mon 06 Jul 2015 UTC

Cullercoats

Anticyclone 1028 in Norwegian Sea Friday evening will remain slow-moving during Saturday before declining 1024 and moving east into the Baltic during Sunday. Low 999 west of Ireland Friday evening will move further westwards into the Atlantic during Saturday and remain slow-moving during Sunday with little change. Anticyclone 1024 will build for a time in Biscay by midday Saturday with frontal trough moving across the region during the day. By midday Sunday anticyclone builds across North Sea with centre 1022 in Humber. Ridge across North Sea declines on Monday as shallow low 1006 moves into Fastnet by midday. Wind will be generally light to moderate for much of the period although they may be strong easterly in Thames, Dover and Wight at first. Winds veer south to southeasterly during Saturday then remain mostly south to southwesterly through the rest of the period

Niton

Low 999 west of Ireland Friday evening will move further westwards into the Atlantic during Saturday and remain slow-moving during Sunday with little change. Anticyclone 1024 will build for a time in Biscay by midday Saturday. By midday Sunday low 1012 will move into mid-Atlantic and then into Fastnet by midday Monday 1006. Azores anticyclone 1028 builds during Monday and ridges northeastwards into Biscay with centre 1021 emerging in southern Biscay. Strong west to southwesterly winds in Fitzroy, Sole, Fastnet and Shannon at first will ease overnight. During Saturday and into Sunday strong southwesterly winds continue in Sole and Shannon but ease by the end of Sunday. Winds then pick up in Fitzroy to strong south to southwesterly around low centre moving up towards Fastnet. Strong southwesterly winds may affect the western Channel for a time on Monday. Strong southwesterly winds also develop on Shannon by the end of Monday

Portpatrick

Anticyclone 1028 in Norwegian Sea Friday evening will remain slow-moving during Saturday before declining 1024 and moving east into the Baltic during Sunday. Low 999 west of Ireland Friday evening will move further westwards into the Atlantic during Saturday and remain slow-moving during Sunday with little change. During Monday this low then starts moving eastwards to 57 north 17 west by the end of the day 996. By midday Sunday low 1012 will move into mid-Atlantic and then into Fastnet by midday Monday 1006. Strong easterly winds develop in many parts north of Rockall, Hebrides during Saturday reaching gale-force at times in Hebrides and Bailey and Southeast Iceland overnight into Sunday. Strong southwesterly winds will affect Shannon and Rockall during Sunday and continue in Shannon during Monday. Elsewhere winds will become mostly light to moderate

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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