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Extended Outlook

Extended outlook forecast

Issued: 2039 on Sun 24 May 2015 UTC

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

Valid from 2100 on Tue 26 May 2015 UTC until 2100 on Fri 29 May 2015 UTC

Cullercoats

On Tuesday evening a broad ridge of high pressure extending northeast from the Azores high, 1036, is expected to cover most of the British Isles with low pressure across Iceland and Scandinavia. During Wednesday the ridge will decline as a developing area of low pressure moves quickly east into Scotland, 1004, by midnight Thursday and then into the northeastern part of the North Sea, 990, by midday Thursday. The low slowly fills and moves northeast into Scandinavia through Friday with a ridge high pressure moving over the English Channel. Occasional strong wind north of 56 north on Tuesday evening gradually easing Wednesday afternoon. Strong wind arriving south of 57 south Wednesday night spreading north to all areas on Thursday morning with a risk gales Forties, Dogger, Fisher, German Bight. Winds easing overnight and moderating in all areas by Friday morning

Niton

On Tuesday evening a broad ridge of high pressure extending northeast from the Azores high, 1036, is expected to cover most of the British Isles with low pressure across Iceland and Scandinavia. During Wednesday a developing area of low pressure moves quickly east into Scotland, 1004, by Wednesday night with the influence of high pressure becoming confined to Biscay, Fitzroy and southwest Sole. Low pressure will gradually move away northeast on Thursday, with the high pressure ridge again spreading north across all areas by Thursday evening and persisting on Friday. Pressure is expected to remain relatively low across the Iberian Peninsula during the period. Strong to near gale force winds expected in south Fitzroy throughout the period. Occasional strong winds developing Shannon Wednesday morning spreading east to all areas north of 49 north on Wednesday night, then moderating by Thursday afternoon

Portpatrick

On Tuesday evening a broad ridge of high pressure extending northeast from the Azores high, 1036, is expected to cover most of the British Isles with low pressure across Iceland and Scandinavia. During Wednesday the ridge will decline as a developing area of low pressure moves quickly east into Scotland, 1004, by midnight Thursday and then into the eastern part of the North Sea, 990, midday Thursday. The low slowly fills and moves northeast into Scandinavia through Friday with high pressure building into English Channel, southern Irish Seas areas and Shannon from Thursday night. Occasional strong westerly winds are expected to affect areas north of 56 north on Tuesday evening, extending south into all areas during Wednesday although easing in Fair Isle, Faeroes and Southeast Iceland Wednesday afternoon. Strong winds moderating all areas Thursday evening. Strong to gale force wind possible Friday afternoon Bailey, Faeroes and Southeast Iceland

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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