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Extended outlook

2200 UTC Saturday 21 April to 2200 UTC Tuesday 24 April 2018

Issued by the Met Office, on behalf of the Maritime and Coastguard Agency, at 192100 UTC

Cullercoats

During Saturday evening and Sunday an area of high pressure 1023, lying in the southern North Sea at first, will decline eastwards. Low pressure 993 south of Iceland will also move eastwards to lie near Fair Isle by early Monday, with associated pressure troughs crossing the British Isles and into the North Sea. This low pressure centre will move further east to northern Norway on Monday with the Azores high extending a weak ridge across the British Isles later Monday and early Tuesday. Another small area of low pressure will approach Ireland later Tuesday, and pressure will remain low in the Norwegian Sea and to the west of Iceland. Southeasterly winds will become occasionally strong in the North Sea on Sunday, then veer southwesterly later, and veer westerly on Monday, and continuing occasionally strong during Monday. Winds will moderate later Monday

Niton

During Saturday evening and Sunday an area of high pressure 1023, lying in the southern North Sea at first, will decline eastwards. Low pressure 993 south of Iceland will also move eastwards to lie near Fair Isle by early Monday, with associated pressure troughs crossing the British Isles and into the North Sea. This low pressure centre will move further east to northern Norway on Monday with the Azores high extending a weak ridge across the British Isles later Monday and early Tuesday. Another small area of low pressure will approach Ireland later Tuesday. Southwesterly winds will become occasionally strong in Shannon on Sunday, extending to Irish Sea later, with strong northerly winds developing in South Fitzroy. Occasionally strong winds may extend to Thames, the English Channel, and Sole, Lundy and Fastnet on Monday, but moderating later in all sea areas except South Fitzroy. Strong winds will return to Atlantic sea areas on Tuesday

Portpatrick

During Saturday evening and Sunday an area of high pressure 1023, lying in the southern North Sea at first, will decline eastwards. Low pressure 993 south of Iceland will also move eastwards to lie near Fair Isle by early Monday, with associated pressure troughs crossing the British Isles and into the North Sea. This low pressure centre will move further east to northern Norway on Monday with the Azores high extending a weak ridge across the British Isles later Monday and early Tuesday. Another small area of low pressure will approach Ireland later Tuesday. Occasionally strong winds in Atlantic sea areas on Saturday evening and early Sunday will extend to Irish Sea later Sunday. Winds will continue occasionally strong through Monday, but tending to moderate later and early Tuesday. Further strong winds are expected to return to southern areas later on Tuesday

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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