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Extended Outlook

Extended outlook forecast

Issued: 2023 on Wed 16 Apr 2014 UTC

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

Valid from 2100 on Fri 18 Apr 2014 UTC until 2100 on Mon 21 Apr 2014 UTC

Cullercoats

On Friday evening a low pressure centre is positioned northwest of Iceland and a trough of low pressure lying from northeast to southwest from Rockall to Norwegian Sea. At the same time high pressure extends from the mid Atlantic across the UK to Scandinavia. The low pressure centre will gradually move away to the north and the trough will weaken to be replaced by high pressure drifting north during Saturday. A further area of low pressure is expected to develop over the low countries on Saturday night and then drift westwards across southern Britain through Sunday to lie south of Ireland by late Monday. For Cullercoats quiet conditions are expected to prevail through Friday and Saturday. Strong winds will develop on Sunday in the southern North Sea around Dogger, German Bight, Humber and northern Thames easing later in the day

Niton

On Friday evening an area of high pressure extends from the mid Atlantic across the UK to Scandinavia. A slow moving, slack area of low pressure lies across much of southern Europe, across Biscay, Fitzroy and Trafalgar. High pressure will drift gradually northwards over the weekend and a low centre, 999, is expected to develop over the Low Countries on Saturday night. This is expected to move westwards across southern parts of the British Isles through Sunday to lie to the south of Ireland by late on Monday. For the Niton area this set up means there will be little in the way of strong winds through most of the forecast period. There is a risk of strong winds in Lundy, Fastnet and Irish Sea late on Sunday as the low pressure centre moves from the east, with these easing by Monday morning

Portpatrick

On Friday evening low pressure is centred northwest of Iceland and a low pressure trough lies northeast to southwest from Rockall to Norwegian Sea. At the same time high pressure extends from the mid Atlantic across the UK to Scandinavia. The low pressure centre will gradually move away northwards and the trough will weaken to be replaced by high pressure during Saturday. A further area of low pressure is expected to develop over the low countries on Saturday night, then drift westwards across southern Britain through Sunday to lie south of Ireland by late Monday. Strong to near gale force winds in northern Bailey, northern Hebrides, Faeroes and Southeast Iceland on Friday night with gradually ease through Saturday. Strong winds may affect Rockall for a time on Saturday, with a risk of further strong winds in Lundy, Fastnet and Irish Sea late on Sunday, with these easing by Monday morning

Extended outlook overview

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

For the extend outlooks the waters surrounding the British Isles are divided into three areas; Cullercoast, 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.

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