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Extended outlook

Issued at:

For the period to

Cullercoats
An area of high pressure 1040 will initially be centred over the near continent on Monday evening, then gradually decline to 1018 by the end of Thursday, although a ridge will extend towards Iceland later Tuesday, and through Wednesday and Thursday. A major area of low pressure will become centred in the north Atlantic on Monday evening, with this low 975 then progressing northeastwards to cross Iceland around midday Tuesday, then to northern Scandinavia by midday Wednesday. Further major low pressure areas will develop south of Greenland on Wednesday and Thursday, with associated frontal troughs extending to Ireland and the Bay of Biscay. Strong southwesterly winds are expected in northern sea areas on Monday evening and Tuesday, with gales developing in Fair Isle, extending to Viking and North Utsire later Tuesday. Winds will moderate through Wednesday. Areas of fog may form where winds fall light in central and southern sea areas
Niton
An area of high pressure 1040 will initially be centred over the near continent on Monday evening, then gradually decline to 1018 by the end of Thursday, although a ridge will extend towards Iceland later Tuesday, and through Wednesday and Thursday. A major area of low pressure will become centred in the north Atlantic on Monday evening, with this low 975 then progressing northeastwards to cross Iceland around midday Tuesday, then to northern Scandinavia by midday Wednesday. Further major low pressure areas will develop south of Greenland on Wednesday and Thursday, with associated frontal troughs extending to Ireland and the Bay of Biscay. Strong winds or gales are possible in Shannon on Monday evening, with strong winds in the west, but then moderating early Tuesday. Occasionally strong winds are possible in Atlantic sea areas, through Wednesday and Thursday, possibly near gales in Fitzroy for a time with possible strong winds in Portland and Plymouth
Portpatrick
An area of high pressure 1040 will initially be centred over the near continent on Monday evening, then gradually decline to 1018 by the end of Thursday, although a ridge will extend towards Iceland later Tuesday, and through Wednesday and Thursday. A major area of low pressure will become centred in the north Atlantic on Monday evening, with this low 975 then progressing northeastwards to cross Iceland around midday Tuesday, then to northern Scandinavia by midday Wednesday. Further major low pressure areas will develop south of Greenland on Wednesday and Thursday, with associated frontal troughs extending to Ireland and the Bay of Biscay. Gales are expected in the Atlantic sea areas during Monday evening, but tending to moderate in the south on Tuesday. Gales or severe gales are forecast in the north through Tuesday, with possible storms in Southeast Iceland. Winds will gradually moderate through Wednesday to occasionally strong in the north and west

Marine weather extended outlook for the next 3 to 5 days

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. Please refer to GMDSS services, INMARSAT SafetyNET or international NAVTEX for the latest information. When using these web pages, always check that the page on your screen is not from your cache. Use the Refresh or Reload button if in any doubt.

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