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 4am Wednesday, 20 June 2018 for the period ending 7am Friday.
At 1am a belt of high pressure, 1024mb, stretching from the Azores across northern France was slow moving. Low, 1009mb, over Northern Ireland expected to move northeast.
Forecast from 7am Wednesday to 7am Thursday.
Wind: Southwest to west 2 to 3, occasionally 4, locally variable or northeast Guernsey southwards, becoming generally northwest 2 to 4 by evening, veering north 4 to 5 overnight, locally 6 by dawn.
Sea state: Smooth or slight, increasing slight to moderate overnight.
Weather: Mist or fog banks and a little drizzle at times, all clearing Jersey northwards after dawn.
Visibility: Moderate to very poor, occasionally good.
Swell: 2 to 5 feet.
Outlook from 7am Thursday to 7am Friday.
Wind: Northerly 4 to 5, locally 6 at first, decreasing 2 to 4 in the afternoon, backing northeast after midnight.
Sea state: Moderate with a low swell, decreasing slight in the afternoon.
Weather: Mist or fog patches and a little drizzle in the south of the area, clearing by mid morning.
Visibility: Good, locally moderate to very poor in the south of the area until mid morning.