Issued by the Jersey Meteorological Department at 4pm Sunday, 16 December 2018 for the period ending 7pm Tuesday.
- At the time of issue there was a Gale Warning in force for Sea Area Portland.
- At the time of issue there was a Strong Wind Warning in force for the Channel Islands Area.
Occasional showers or rain.
At midday deep low 970mb, 300 miles southwest of Iceland was slow moving. Further low 972mb, 600 miles south of Greenland moving northeast and deepening. High pressure expected to build over Spain by Monday morning.
Forecast from 7pm Sunday to 7pm Monday.
Forecast: Scattered showers, locally heavy with a risk of hail and thunder, becoming isolated and lighter by dawn.
Wind: West 5 to 6, occasionally 7, decreasing 4 to 5 before dawn, backing southwest in the morning, then south 5 to 6 in the afternoon, perhaps locally 7 mid-Channel later.
Visbility: Moderate to good, occasionally poor in showers.
Sea State: Rather rough to rough, decreasing moderate to rather rough by dawn, perhaps occasionally rough mid- Channel later.
Sea Swell: Confused with total wave heights 7 to 11 feet, decreasing 5 to 9 feet by dawn.
Outlook from 7pm Monday to 7pm Tuesday.
Forecast: Isolated showers, dying out overnight. Rain in the west of the area from around dawn, spreading east, occasionally heavy.
Wind: South 5 to 6, occasionally 7 mid-Channel, increasing 6 to 7 by midnight, then 7 to gale 8 before dawn, veering southwest to west and decreasing 4 to 6 by Tuesday evening.
Visbility: Good, occasionally moderate in showers and moderate to poor in rain.
Sea State: Moderate to rather rough in the south, rather rough to rough in the north, becoming very rough mid- Channel around dawn.