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Sea Area Forecast

Forecast valid from: 18:00, Wednesday 22 September 2021 until 18:00, Thursday 23 September 2021

Small Craft Warning

Southwesterly winds, veering westerly, will reach force 6 or higher this evening (Wednesday), tonight and tomorrow on Irish coasts from Valentia to Erris Head to Belfast Lough.

Gale Warning

Nil

Atlantic Swell

developing at times on northwestern sea areas

Meteorological Situation at 15:00 UTC

An anticyclone of 1031hPa to the southwest of Ireland and a depression of 951hPa centred to the northeast of Iceland generate a mainly moderate to fresh southwesterly airflow, strong on western and northern sea areas. A cold front lies over the northwest of the country, tracking southeastwards this evening and tonight with a fresher westerly airflow following.

Small Craft Warning: In effect

Heavy Swell (>4m) : yes

Wave Height Forecast

Forecast for Irish coastal waters from Valentia to Loop Head to Slyne Head

Wind: Southwesterly force 5 or 6, veering westerly force 4 or 5 imminent.

Weather: Patchy rain and drizzle for a time this evening and tonight with some mist patches. Cloudy to fair tomorrow.

Visibility: Moderate to poor at times in precipitation and mist, otherwise good.

Forecast for Irish coastal waters from Slyne Head to Malin Head to Belfast Lough

Wind: Increasing westerly force 5 or 6 imminent. Soon increasing force 5 to 7. Later decreasing westerly force 4 or 5 and gusty before increasing force 6 from Rossan Point to Malin Head to Fair Head by the end of the period.

Weather: Light rain and drizzle clearing southeastwards early tonight, becoming cloudy to fair with mist patches. Mostly cloudy tomorrow with patchy light rain and drizzle.

Visibility: Moderate to poor at times in precipitation and mist, otherwise good.

Forecast for Irish coastal waters from Belfast Lough to Carnsore Point to Valentia and for the Irish Sea

Wind: West to southwest force 4 or 5 and gusty, reaching force 6 on the North Irish Sea. Soon becoming westerly and increasing force 6 at times north of Howth Head. Later decreasing force 4 or 5 and gusty, further decreasing force 3 to 5 by the end of the period, strongest on the North Irish Sea.

Weather: Fair to cloudy at first. Patchy rain and drizzle for a time this evening and tonight with some mist patches. Cloudy to fair tomorrow with patchy drizzle.

Visibility: Moderate to poor at times in precipitation and mist, otherwise good.

Outlook for a further 24 hours until 18:00, Friday 24 September 2021

Moderate to fresh, occasionally gusty west to southwest winds, increasing strong to near gale in the north and northwest but easing by the end of the period. Weather: Patchy light rain and drizzle, mainly in the west and north. Fair to cloudy elsewhere initially with patches of drizzle and mist, becoming cloudy through Thursday evening and night.

Forecast issued at: 18:00, Wednesday 22 September 2021

All times are local unless specified

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