For the area bounded by latitude 50N, the French coast between Cap de la Hague and Île de Bréhat and longitude 3W.
Issued by the Jersey Meteorological Department at 10pm Wednesday, 20 June 2018 for the period ending 1am Saturday.
At 1pm, high 1030mb, 450 miles west of Ireland, expected to drift east by midday Thursday and build. Low, 1007mb over the North Sea, expected to move northeast, with associated cold front clearing the area by Thursday morning.
Forecast from 1am Thursday to 1am Friday.
Wind: Northwest 3 to 5, soon veering northerly 4 to 5 early morning, locally 6, decreasing 3 to 5 again by Friday evening.
Sea state: Smooth or slight, increasing moderate by dawn, occasionally slight Thursday evening.
Weather: Mist or fog banks and a little drizzle at times, clearing by dawn.
Visibility: Moderate to very poor, becoming good by dawn
Swell: 2 to 4 feet.
Outlook from 1am Friday to 1am Saturday.
Wind: Northeasterly 2 to 4, occasionally 5 until dawn, locally north Jersey southwards in the afternoon.
Sea state: Slight, occasionally moderate, with a low swell.