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 10am Tuesday, 23 January 2018 for the period ending 1pm Thursday.
At 6am, complex low 966mb southwest of Iceland, expected to drift east. A warm front close to the Channel Islands, expected to move east this morning.
Forecast from 1pm Tuesday to 1pm Wednesday.
Wind: Southwest to south 5 to 6, perhaps locally 7 mid Channel, increasing 6 to gale 8 after midnight, perhaps with gusts to 50kt, locally west 6 in the northwest of the area by midday Wednesday.
Sea state: Moderate in the south to rough in the north, increasing rough to very rough mid morning.
Weather: Patchy rain and drizzle, more persistent and perhaps heavy towards Wednesday afternoon. Mist in places.
Visibility: Moderate to poor, locally good, especially near the Brittany coast.
Swell: 4 to 8 feet, locally confused in the north with total waves 8 to 11 feet, becoming generally confused with total waves 8 to 14 feet by mid morning.
Outlook from 1pm Wednesday to 1pm Thursday.
Wind: Southwest 7 to gale 8 with gusts to 50kt, locally west 6 in the northwest of the area, becoming generally southwest to west 5 to 6 Wednesday afternoon, occasionally 7.
Sea state: Rough to very rough decreasing rough in the north and rather rough with a swell in the south by evening.
Weather: Rain and drizzle, locally heavy, with mist patches, clearing by early evening then showers developing.
Visibility: Moderate to poor, becoming mainly good by early evening.