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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 10am Thursday, 18 July 2019 for the period ending 1pm Saturday.

General Situation

At 7a.m. low, 1008mb, mid Atlantic, expected to move east and deepen to be 999mb just west of county Kerry by noon Friday, with associated weather front affecting the Channel during Friday.

Forecast from 1pm Thursday to 1pm Friday.

Wind: West 4 occasionally 3, and 5 at times mid-Channel late afternoon and evening, locally northwesterly across far south of the area, backing southwest to south overnight, after dawn increasing 4 or 5 and occasionally 6 across the north and west of the area.

Sea state: Slight, occasionally moderate till midnight, mainly in the north of the area. During the morning across the north and northwest of the area increasing moderate.

Weather: Mist patches and drizzle clearing far southeast of the area by mid-afternoon. Fair, then patchy drizzle and mist in the west and north of the area after dawn, perhaps reaching some southeastern parts of the area by noon.

Visibility: Moderate or good, perhaps poor at times in the southeast of the area early this afternoon and also in the west and north after dawn.

Swell: 2 to 4 feet.

Outlook from 1pm Friday to 1pm Saturday.

Wind: Southwest to south 4 to 5, locally 3 across southeast of the area, occasionally 6 mid-Channel and northwest of the area. During the evening generally increasing 5 to 6 then veering southwest to west after dawn and decreasing 4 or 5 by mid-morning.

Sea state: Slight in the south to moderate in the north, then overnight increasing slight to moderate in the south and increasing moderate to rather rough in the north.

Weather: Occasional drizzle and mist with a risk of fog patches. Persistent and locally heavy rain from evening with extensive mist and patchy fog. Clearing to isolated showers by mid-morning.

Visibility: Moderate to good, locally poor, becoming generally moderate or poor during evening and locally very poor till around dawn, improving good during the morning.

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