Coast and sea

Extended outlook

Issued at: .

For the period to .

Extended outlook map

Cullercoats

During Monday evening and Tuesday an area of low pressure 991 will lie west of Ireland, with cyclonic conditions across most sea areas. Another discrete low pressure centre will form near The Shetland Isles, then move northwards later Tuesday. A secondary low will run into Fitzroy during Tuesday evening. High pressure will lie near Iceland, and develop later over the North Sea. A similar pressure pattern will persist through Wednesday with complex low developing over the British Isles, and slowly filling. This low will move southwards through Thursday, with ridge conditions from the Icelandic high pressure extending over northern Britain. Strong winds during Monday evening and Tuesday morning, perhaps with occasional gales in Fair Isle, will moderate later. Winds may continue occasionally strong in Fair Isle on Wednesday, then strong northerly winds will spread to across other northern sea areas through Thursday

Niton

During Monday evening and Tuesday an area of low pressure 991 will lie west of Ireland, with cyclonic conditions across most sea areas. Another discrete low pressure centre will form near Shetland, then move northwards later Tuesday. A secondary low will run into Fitzroy during Tuesday evening. High pressure will lie near Iceland, and develop later over the North Sea. A similar pressure pattern will persist through Wednesday with complex low developing over the British Isles, and slowly filling. This low will move southwards through Thursday, with ridge conditions from the Icelandic high pressure extending over northern Britain. Winds will be strong in Atlantic sea areas during Monday evening and Tuesday morning, with occasional gales in Fitzroy, Sole and Shannon, moderating to occasionally strong later, but with further gales in Fitzroy. Winds will continue occasionally strong in the Atlantic through Wednesday, possible gales for a time in Biscay and Fitzroy. Strong northerly winds will develop in the Atlantic during Thursday

Portpatrick

During Monday evening and Tuesday an area of low pressure 991 will lie west of Ireland, with cyclonic conditions across most sea areas. Another discrete low pressure centre will form near The Shetland Islands, then move northwards later Tuesday. A secondary low will run into Fitzroy during Tuesday evening. High pressure will lie near Iceland, and develop later over the North Sea. A similar pressure pattern will persist through Wednesday with complex low developing over the British Isles, and slowly filling. This low will move southwards through Thursday, with ridge conditions from the Icelandic high pressure extending over northern Britain. Strong winds or gales are forecast widely in Atlantic sea areas during Monday evening and Tuesday morning, with possible severe gales in Rockall and Bailey for a time, moderating to strong in north later Tuesday. Strong northerly winds will persist in Atlantic sea areas through Wednesday and Thursday

The extended outlook information

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.

Marine forecasts disclaimer

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