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 4pm Saturday, 20 January 2018 for the period ending 7pm Monday.
At midday complex low, 996mb, from Belgium to Cornwall was expected to move southeast as a weak ridge builds over the Channel tonight. Low, 978mb, over the Atlantic expected to move northeast towards Iceland and deepen.
Forecast from 7pm Saturday to 7pm Sunday.
Wind: West to northwest 6 to 7, occasionally gale 8, slowly decreasing overnight 2 to 4 by dawn, backing southwest for a time, quickly veering west after dawn and increasing 6 to 7, perhaps gale 8 at times.
Sea state: Rather rough to rough, occasionally very rough.
Weather: Misty with occasional rain or drizzle, becoming persistent at times after midnight. Risk of fog patches from early Sunday morning.
Visibility: Moderate to poor, perhaps very poor in any fog patches.
Swell: Confused with total waves 8 to 15 feet.
Outlook from 7pm Sunday to 7pm Monday.
Wind: West to southwest 6 to gale 8, veering northwest around dawn, decreasing 4 to 5 in the afternoon and backing southwest early evening.
Sea state: Rather rough to rough, perhaps occasionally very rough.
Weather: Mist or fog patches and occasional rain or drizzle, perhaps heavy, clearing Monday morning.
Visibility: Moderate to poor, occasionally very poor.