Issued by the Jersey Meteorological Department at 10pm Wednesday, 22 November 2017 for the period ending 1am Saturday.
- At the time of issue there were Gale Warnings in force for Sea Areas Wight, Portland, and Plymouth.
- At the time of issue there was a Gale Warning in force for the Channel Islands area.
Outbreaks of rain
At 6pm, complex low pressure over the British Isles and Biscay expected to move northeast and deepen, with associated fronts affecting the Channel at times.
Forecast from 1am Thursday to 1am Friday.
Forecast: Occasional rain, perhaps heavy with a risk of thunder, clearing soon after dawn. Further rain by evening, locally heavy.
Wind: South 7 to gale 8 with gusts to 55kt, locally severe gale 9 at first, veering southwest to west 6 to 7 by dawn, occasionally gale 8, decreasing 4 to 5 in the afternoon, occasionally, becoming cyclonic variable 3 to 5 in the evening.
Visbility: Moderate, occasionally poor in rain, becoming moderate to good for a time.
Sea State: Rough or very rough, decreasing rather rough to rough in the morning and slight to moderate in the evening.
Sea Swell: Confused with total waves 8 to 15 feet, gradually decreasing from dawn, then 4 to 8 feet of swell developing by evening.
Outlook from 1am Friday to 1am Saturday.
Forecast: Occasional rain, perhaps locally heavy in the evening.
Wind: Cyclonic variable 3 to 5, becoming northerly 2 to 3 by dawn, locally 4, then variable 1 to 3 for a time from late morning, becoming northwest 4 to 5 in the evening.
Visbility: Moderate to good, occasionally poor in rain.
Sea State: Slight to moderate increasing moderate to rather rough in the evening, with a swell.