Y Tywydd Rhagolwg Estynedig

Gosodiadau
Iaith

Mae'r cynnwys hwn ar gael yn Saesneg yn unig.

Map of extended outlook areas

Map Key

  • dark blue Niton
  • purple Cullercoats
  • dark green Portpatrick

Extended Outlooks 1800 UTC Sat 10 Dec to 1800 UTC Tue 13 Dec Issued by the Met Office, on behalf of the Maritime and Coastguard Agency, at 082300 UTC

  1. Niton

    Niton On Saturday evening a ridge of high pressure, 1029, centred over Fitzroy will extend across most of Niton. During Sunday the ridge will drift slowly eastwards into the continent as Atlantic lows begin to dominate the northwest of Niton. During Monday and Tuesday pressure will remain high across most of the region except Shannon. On Saturday evening light winds extend across most of Niton, however overnight into Sunday strengthening south-westerly winds will begin to develop in Shannon, these will increase to gale strength at times and affect Sole later in the day. Overnight into Monday gales will cease in Sole and Shannon as winds ease. During Monday light winds for most though later in the day strong to gale strength southeasterlies may develop over western Shannon. On Tuesday strong winds will be confined to sea area Fitzroy.

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  2. Cullercoats

    On Saturday evening a deep low, 988, lies over sea area Bailey. Overnight it will drift eastwards into Faeroes and fill slowly. Through Sunday the low centre fills and tracks east into Scandinavia as a weakening feature. During Sunday night further low pressure centres are likely to develop to the west of Portpatrick but evolution and tracks are uncertain at this stage. To the south of Cullercoats a ridge of high pressure will build. Strong winds across much of Cullercoats through Saturday night into Sunday, possibly with gales in Fair Isle. Winds easing further north during Sunday but remaining strong in the south. On Tuesday winds will ease across much of the area, though strong to gale force southerlies, veering westerly, may affect Fair Isle and Viking for a while.

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  3. Portpatrick

    Portpatrick On Saturday evening a deep low, 988, lies over sea area Bailey. Overnight it will drift eastwards into Faeroes and fill slowly. Through Sunday the low centre fills and tracks east into Scandinavia as a weakening feature. During Sunday night further low pressure centres are likely to develop to the west of Portpatrick but evolution and tracks are uncertain at this stage. To the south of Portpatrick a ridge of high pressure will build. Overnight Saturday into Sunday a swathe of strong to gale force westerly winds will affect Bailey, Rockall, Hebrides, Faeroes and Fair Isle. These will ease through Sunday morning as strengthening south westerly winds begin to develop in Shannon, these will increase to gale strength at times later in the day and extend northwards into Rockall. During Monday winds will ease further south before a band of strong to gale force southerly veering westerly winds briefly affect Portpatrick north of 57 degrees north. Overnight Monday into Tuesday strong to gale strength southeasterlies may develop over western Shannon, Rockall and Bailey. These strong winds will move northwards across the whole of Portpatrick during the day.

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Last Updated at 22:42 UTC on Thursday 8 December