Sea Area Forecast

Valid until 1800 Wed 13 Dec 2017

Issued at 1800 Tue 12 Dec 2017

Gale warning: In operation.

Small craft warning: In operation.

Meteorological Situation at 1500: A frontal occlusion continues to clear eastwards this evening. It will be followed by a cold unstable and strengthening westerly airflow with gales developing overnight and into Wednesday. Active troughs will follow in the clearance, especially later.

Forecast for Irish coastal waters from Mizen Head to Slyne Head to Malin Head

Wind: West to northwest force 6 or 7, increasing force 7 to gale force 8 and gusty later tonight. Further increasing gale force 8 to strong gale force 9 and gusty Wednesday forenoon.

Weather: Patchy rain this evening. Heavy showers moving into Atlantic sea areas overnight, becoming widespread early Wednesday with the risk of hail and thunder.

Visibility: Mostly moderate

Forecast for Irish coastal waters from Malin Head to Carlingford Lough to Howth Head and the Irish Sea north of Anglesey

Wind: Southwest force 6 or 7 and gusty, veering westerly and decreasing force 5 or 6 and gusty tonight. West to southwest winds will increase 6 to 7 and gusty early Wednesday.

Weather: Patchy rain this evening. Heavy showers moving into Atlantic sea areas overnight, becoming widespread early Wednesday with the risk of hail and thunder.

Visibility: Mostly moderate

Forecast for Irish coastal waters from Howth Head to Carnsore Point to Mizen Head and the Irish Sea south of Anglesey

Wind: West to northwest winds force 5 to 7 and gusty decreasing force 5 or 6 early tonight. West to southwest winds will increase force 7 to gale force 8 and gusty on Wednesday.

Weather: Patchy rain this evening. Heavy showers moving into Atlantic sea areas overnight, becoming widespread early Wednesday with the risk of hail and thunder.

Visibility: Mostly moderate

Warning of Heavy Swell

Heavy swell Developing along Atlantic sea areas into Wednesday

Outlook for a further 24 hours until 1800 Thu 14 Dec 2017

Gale or strong gale force westerly winds later veering west to northwest. Widespread blustery showers - most frequent for Atlantic sea areas.