Coast and sea

Extended outlook

Issued at: .

For the period to .

Extended outlook map

Cullercoats

During Friday evening an area of high pressure will be centred over Holland, with ridge axis across southern Britain and extending to the Azores. This will decline southwards during Saturday as low pressure 969 runs to near southwest Iceland, and deepens to 952, becoming a complex low, and extending cyclonic conditions across all sea areas. A similar pressure will persist through Sunday and Monday with low filling to 960, and frontal troughs running across Britain and Ireland. A rapidly deepening low pressure is expected to run towards Ireland during Monday, but low confidence in location at present. During Friday evening and Saturday winds will be strong in the North Sea, with occasional gales in the north. Strong winds with gales in the north are expected on Sunday and Monday, with strong winds extending to Thames, Dover and Wight later Sunday. Severe gales are possible in the north later Monday, and risk of gales or severe gales in south

Niton

During Friday evening an area of high pressure will be centred over Holland, with ridge axis across southern Britain and extending to the Azores. This will decline southwards during Saturday as low pressure 969 runs to near southwest Iceland, and deepens to 952, becoming a complex low, and extending cyclonic conditions across all sea areas. A similar pressure will persist through Sunday and Monday with low filling to 960, and frontal troughs running across Britain and Ireland. A rapidly deepening low pressure is expected to run towards Ireland during Monday, but low confidence in location at present. Strong southwesterly winds in Shannon on Friday evening will extend to Northwest Fitzroy, Sole, Lundy, Irish Sea and Fastnet during Saturday, with occasional gales in Shannon. Strong winds will extend to all areas on Sunday, with occasional gales in Sole, Fastnet and Shannon. Gales in the west may extend eastwards during Monday, with risk of severe gales, but low confidence in detail

Portpatrick

During Friday evening an area of high pressure will be centred over Holland, with ridge axis across southern Britain and extending to the Azores. This will decline southwards during Saturday as low pressure 969 runs to near southwest Iceland, and deepens to 952, becoming a complex low, and extending cyclonic conditions across all sea areas. A similar pressure will persist through Sunday and Monday with low filling to 960, and frontal troughs running across Britain and Ireland. A rapidly deepening low pressure is expected to run towards Ireland during Monday, but low confidence in location at present. During Friday evening, Saturday and Sunday occasional gales are expected in all Atlantic sea areas, increasing to strong in Lundy, Irish Sea and Fastnet later Saturday. Severe gales are possible in Rockall, Bailey, Faeroes and Southeast Iceland Saturday morning. Strong winds or gales are expected widely on Monday, with risk of severe gales, but low confidence in detail

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

For the extended 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.

Caution: The internet is not part of the Maritime Safety Information system and should never be relied upon as the only means to obtain the latest forecast and warning information. Access to the service may be interrupted or delayed from time to time, updates may also be delayed.

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