Coast and sea

Extended outlook

Issued at: .

For the period to .

Extended outlook map

Cullercoats

Low centred South Utsire 991 on Wednesday evening loses identity overnight into Thursday morning. Low Lundy 998 on Wednesday evening moves south and is expected Biscay 992 by midday on Thursday, moving inland Spain after this. A large area of low pressure becomes slow moving over central France on Friday. During Saturday this splits, with two low centres expected German Bight 997 and Biscay 1003 by midday Saturday, these both becoming slow moving. There is a risk of gales in Fisher and Wight at first Wednesday evening but quickly decreasing. No hazardous winds for most of Cullercoats on Thursday, except Fair Isle where gales possible for a time later, these decreasing early on Friday morning. During Friday, gales expected at times in southern North Sea and English Channel areas. Gales expected in Forties, Fisher and German Bight on Saturday but decreasing in other areas

Niton

Low Lundy 998 on Wednesday evening moves south and is expected Biscay 992 by midday on Thursday, moving inland Spain after this. On Friday a large area of low pressure becomes slow moving over central France. By midday Saturday low expected Biscay 1003, slow moving and filling later. A complex area of low pressure also develops on Saturday to the northwest of Niton, expected Rockall 1005 midday Saturday then Shannon 1004 by Saturday evening. Risk of gales in all of Niton except Thames and Dover on Wednesday evening. During Thursday gales are expected in Irish Sea and all Atlantic areas of Niton, perhaps with severe gale or storm in Fitzroy for a time. During Friday, gales are expected in all parts of Niton except Irish Sea and Shannon, and will decrease during the early hours of Saturday morning. Gales developing later Saturday in Sole and Shannon, and perhaps Fitzroy by evening

Portpatrick

Low Lundy 998 on Wednesday evening moves south and is expected Biscay 992 by midday on Thursday, moving inland Spain after this. On Friday a large area of low pressure becomes slow moving over central France with a narrow area of high pressure expected Hebrides 1025. This high declines on Saturday as complex area of low pressure develops in western Portpatrick, expected Rockall 1005 midday Saturday then Shannon 1004 by Saturday evening. Gales in Fastnet and Shannon on Wednesday evening, and perhaps also in Irish Sea, Rockall and Malin. During Thursday gales are expected in Lundy, Fastnet, Irish Sea and Shannon, and perhaps Fair Isle for a time later. Gales decreasing in all but Lundy and Fastnet on Friday morning, then reducing here during Friday afternoon. By Friday evening gales are likely in Bailey and South East Iceland, decreasing here during Saturday. Gales later Saturday in Shannon and Rockall

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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