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Channel Islands shipping forecast

For the area bounded by latitude 50°N, the French coast between Cap de la Hague and Ile de Brehat and longitude 3°W.

Issued by the Jersey Meteorological Department at 10pm Tuesday, 18 September 2018 for the period ending 1am Friday.

General Situation

At 1 p.m. Low, 991mb, over the Orkney Isles expected to move northeast and fill. Further complex low, 981 mb, mid-Atlantic expected to move northeast and deepen, with associated fronts affecting the Channel from Wednesday night.

Forecast from 1am Wednesday to 1am Thursday.

Wind: Southwest 4 to 5, perhaps locally 6 in the north, increasing 5 to 6 during Wednesday morning, locally 7 in the north, decreasing 4 in the south in the afternoon and generally 3 to 4 in the evening.

Sea state: Slight to moderate, locally rather rough, increasing moderate in the south to rough in the north until early evening.

Weather: Isolated showers after dawn, mainly in the north. Risk of mist patches.

Visibility: Good, occasionally moderate, perhaps locally poor.

Swell: 3 to 6 feet, becoming 2 to 3 feet for a time Wednesday afternoon.

Outlook from 1am Thursday to 1am Friday.

Wind: Southwest to south 3 to 4, increasing 5 to 6 during Thursday morning, locally 7 in the north by evening, decreasing 3 to 5 in the evening, becoming northwest towards mid Channel later.

Sea state: Moderate to rather rough, perhaps locally rough in the north at first, decreasing slight to moderate for a time overnight, with a low swell.

Weather: Risk of a little rain in the north overnight. Mist patches at times. Rain, perhaps locally heavy, from early evening.

Visibility: Good, occasionally moderate to poor.

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