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 Thursday, 23 March 2017 for the period ending 7am
At midnight complex low, 1005mb, over southern
Britain, the Channel and Biscay expected to move slowly
south on Friday, as high pressure builds over the
Forecast from 7am Thursday to 7am
Wind: Northeast 4 to 5, increasing 5 to 6 this
afternoon, and 7 Guernsey northwards with gusts to 45kt,
gradually veering east to southeast 3 to 5 this evening,
but remaining northeast 6 mid-Channel.
Sea state: Slight to moderate, increasing rather rough for a
time this afternoon and evening, and rough Guernsey
Weather: Isolated showers, becoming more frequent or
prolonged this afternoon, mainly clearing this evening.
Risk of hail and thunder.
Visibility: Good, becoming moderate to poor at
Swell: 3 to 7 feet, decreasing 2 to 3 feet overnight.
Becoming confused Guernsey northwards for a time, with
total waves 8 to 11 feet.
Outlook from 7am Friday to 7am
Wind: East to northeast 3 in the south to 6 in the
north, generally increasing 6 to 7 by late
Sea state: Slight increasing moderate in the south with a
swell, rather rough in the north and west increasing rough
in the evening.
Weather: Risk of showers in the north.
Visibility: Good, occasionally moderate.