Coast and sea

Extended outlook

Issued at: .

For the period to .

Extended outlook map

Cullercoats

An area of complex low pressure 963 in the Norwegian Basin on Tuesday evening will extend troughs south across the UK as it moves east. A transient ridge moves across the UK from the west on Wednesday, before new area of complex low pressure 980 develops west of Rockall later on Wednesday. Low deepens to 964 overnight as it moves northeast into South East Iceland and extends troughs southeast across the UK during Thursday. Complex low pressure then lingers over northern UK into Friday. Gales and strong winds are possible for a time in Viking and Fair Isle on Tuesday evening, easing by Wednesday morning. Gales, and severe gales at times, are then expected to spread in from the west from Thursday morning onwards, affecting all sea areas apart from the English Channel, before then gradually easing across the region on Friday

Niton

Ridge stretches northeast across Biscay and Fitzroy during Tuesday evening and Wednesday, before being pushed east into the Continent on Thursday. An area of complex low pressure 963 in the Norwegian Basin on Tuesday evening will extend troughs south across the UK as it moves east. A transient ridge moves across the UK from the west on Wednesday, before new area of complex low pressure 980 develops west of Rockall later on Wednesday. Low deepens to 964 overnight as it moves northeast into South East Iceland and extends troughs southeast across the UK during Thursday. Complex low pressure then lingers over northern UK into Friday. Isolated gales and strong winds possible for a time in Shannon on Wednesday, before more widespread gales move into Fitzroy, Sole and Fastnet also overnight on Wednesday, continuing into Thursday. Gales spreading into Irish Sea for a time on Thursday afternoon, easing here into the evening but spreading into Portland, Plymouth and Biscay on Friday

Portpatrick

An area of complex low pressure 963 in the Norwegian Basin on Tuesday evening will extend troughs south across the UK as it moves east. A transient ridge moves across the UK from the west on Wednesday, before new area of complex low pressure 980 develops west of Rockall later on Wednesday. Low deepens to 964 overnight as it moves northeast into South East Iceland and extends troughs southeast across the UK during Thursday. Complex low pressure then lingers over northern UK into Friday. Gales expected in the north on Tuesday evening, before easing for all on Wednesday morning. Isolated gales then possible in Shannon, Rockall, Malin, Hebrides and Bailey on Wednesday, before more widespread gales and severe gales move in from the west overnight on Wednesday, affecting all areas. Gales continue across the region into Thursday and Friday, but easing in the north on Friday

The extended outlook information

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.

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