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yellow Warnings have been issued for the United Kingdom

Extended Outlook

Extended outlook forecast

Issued: 2138 on Tue 03 Mar 2015 UTC

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

Valid from 2100 on Thu 05 Mar 2015 UTC until 2100 on Sun 08 Mar 2015 UTC

Cullercoats

A large anticyclone 1041 centred over Brittany on Thursday evening will transfer east into central Europe by Friday evening, with frontal troughs moving east through northern and central parts of the Cullercoats area. However, a ridge of high pressure is expected to persist in the far south through much of the forecast period. A frontal trough will continue to affect the north of the area though Saturday, but during Sunday this is currently expected to move southeast into the central North Sea, with the ridge over the English Channel slowly declining. Gales are presently expected in Fair Isle by midday Friday, extending to Viking, North Utsire, Forties, Cromarty, and Forth by midnight Saturday, before weakening by mid-morning. Further gales are currently expected to develop in Viking and Fair Isle on Saturday evening, extending into North Utsire and Forties overnight, then moderating by midday Sunday

Niton

A large anticyclone 1041 centred over Brittany on Thursday evening will transfer east into central Europe by Friday evening, with frontal troughs moving east through the northwest of the Niton area. High pressure is expected to persist south of 50 N through much of the forecast period, extending northeast from the Azores to central Europe. However, a further frontal trough is currently expected to move southeast into Shannon by midnight Sunday as a weakening feature, this then transferring into the western English Channel by Sunday evening. Strong to gale force winds are expected in Shannon by midnight Friday, persisting through to Saturday evening and extending into west Sole and perhaps northwest Fitzroy at times, before moderating by the early hours of Sunday. At the present times, strong or gale force winds are unlikely elsewhere in the Niton area during this forecast period

Portpatrick

A large anticyclone 1041 centred over Brittany on Thursday evening will transfer east into central Europe by Friday evening, but a ridge of high pressure is expected to persist over the far southeast of the Portpatrick area for much of the forecast period. Frontal toughs are likely to affect northern and western parts through to Saturday as a deep Atlantic low transfers northeast into the Denmark Strait by Sunday. During Sunday a further frontal trough is currently expected to clear southeast through the east of the Portpatrick area, followed by a weak ridge in the south. Gales are expected north of 60 N on Thursday evening, extending to all sea areas over and to the north of Shannon by midday Friday. Severe gales likely in places before winds moderate in the northwest during Saturday. Winds currently expected to moderate elsewhere early on Sunday before further gales spread east north of 57 N during the day

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; 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.

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