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Extended outlook

2100 UTC Wednesday 20 June to 2100 UTC Saturday 23 June 2018

Issued by the Met Office, on behalf of the Maritime and Coastguard Agency, at 182019 UTC

Cullercoats

During Wednesday evening an area of high pressure 1033 will be centred west of Ireland with ridges extending towards Iceland, and across southern Britain. Low pressure will lie in the Norwegian Sea and over Scandinavia, while another low pressure area will lie over Iberia. Troughs of low pressure will run southeastwards across the North Sea. A similar pressure pattern will persist through Thursday, Friday and Saturday, but with the high pressure area moving slowly towards Ireland, and strengthening to 1035 for a time on Thursday, while low pressure area moves towards Finland by Friday. Northwesterly winds will become strong through Wednesday evening and Thursday with possible gales in the North Sea later Thursday. Winds will moderate in the west on Friday, but with possible gales persisting in South Utsire, Fisher and German Bight. Winds will moderate slowly to occasionally strong on Saturday

Niton

During Wednesday evening an area of high pressure 1033 will be centred west of Ireland with ridges extending towards Iceland, and across southern Britain. Low pressure will lie in the Norwegian Sea and over Scandinavia, while another low pressure area will lie over Iberia. Troughs of low pressure will run southeastwards across the North Sea. A similar pressure pattern will persist through Thursday, Friday and Saturday, but with the high pressure area moving slowly towards Ireland, and strengthening to 1035 for a time on Thursday, while low pressure area moves towards Finland by Friday. During Wednesday evening and Thursday northwesterly winds will be occasionally strong in Thames, while northeasterly winds will be occasionally strong in Atlantic sea areas, but moderating in Lundy, Fastnet and Shannon later Thursday. Winds will tend to moderate in Thames on Friday, while strong northeasterly winds become confined to Biscay and Fitzroy by Saturday

Portpatrick

During Wednesday evening an area of high pressure 1033 will be centred west of Ireland with ridges extending towards Iceland, and across southern Britain. Low pressure will lie in the Norwegian Sea and over Scandinavia, while another low pressure area will lie over Iberia. Troughs of low pressure will run southeastwards across the North Sea. A similar pressure pattern will persist through Thursday, Friday and Saturday, but with the high pressure area moving slowly towards Ireland, and strengthening to 1035 for a time on Thursday, while low pressure area moves towards Finland by Friday. On Saturday a weak low pressure centre will move across Iceland. Strong northwesterly winds in Atlantic sea areas on Wednesday evening and Thursday morning will tend to moderate in the south and west during Thursday, but winds may increase to occasional gales in Fair Isle and Faeroes later Thursday, then moderate early Friday. During Friday and Saturday further occasionally strong winds are expected in the north at times

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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