At 6pm, low 985mb, 200 miles west of Belmullet, expected to move slowly north and fill. Further low, 997mb, western Atlantic, expected to deepen and move east to be 990mb over the Irish sea by midnight Saturday.
Forecast from 1am Friday to 1am Saturday.
Weather: Scattered showers, locally heavy, with a risk of thunder at first. Patchy light rain spreading east during the morning, clearing early afternoon, then further rain from evening.
Wind: South 3 to 4, locally 5 near showers, veering southwest by dawn then west 5 to 6 by midday, backing west to southwest 6 to 7 early evening, veering west 7 to gale 8 around midnight.
Visibility: Good, occasionally moderate to poor in showers and in rain later.
Sea state: Slight, increasing moderate to rather rough by midday and rather rough to rough in north and west during the afternoon, locally very rough by midnight.
Sea swell: 3 to 9 feet, becoming confused in the north and west with total waves 9 to 12 feet.
Sea temperature: 12
Outlook from 1am Saturday to 1am Sunday.
Weather: Rain soon clearing. Scattered shower developing, locally heavy with a risk of thunder in the morning.
Wind: West 7 to gale 8, perhaps occasionally severe gale 9 mid-Channel, veering west to northwest by midday, decreasing 5 to 6 by evening.
Visibility: Moderate to good, occasionally poor.
Sea state: Rough to very rough, perhaps locally high in west by dawn, decreasing generally rough during Saturday afternoon.