Y Tywydd Rhagolwg Estynedig

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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 Thu 23 Oct to 1800 UTC Sun 26 Oct Issued by the Met Office, on behalf on the Maritime and Coastguard Agency, at 212300 UTC

  1. Niton

    A large and complex area of low pressure is expected to lie in the vicinity of Iceland late on Thursday, with this feature having multiple centres, the deepest with central pressure near 975. The main low is expected to maintain its position over Iceland as it deepens rapidly to near 960 on Saturday, maintaining this depth through Sunday. This main low feature will be cast in opposition to the Azores high throughout, with this main high declining from 1030 to nearer 1025 by late Sunday. Occasional strong winds are expected in all areas save Biscay and Fitzroy through the period, with these areas south of 48 North seeing no hazardous winds. Strong winds are likely to become more sustained late Friday, with gales possible in Lundy, Fastnet, Irish Sea and Shannon on Saturday, perhaps then severe gales in Shannon on Sunday

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  2. Cullercoats

    A large low pressure is expected to lie in the vicinity of Iceland late on Thursday, with this feature having multiple centres, the deepest with central pressure near 975. The main low is expected to maintain its position over Iceland as it deepens rapidly to near 960 on Saturday, maintaining this depth through Sunday. This main low feature will be cast in opposition to an intense high near the Baltic States throughout, with the high intensifying from 1035 to near 1045 through the period. Strong winds are expected all areas late Thursday, with gales developing north of 58 North for a time into Friday morning. Occasional strong winds are then expected in all areas through Friday and at first Saturday, before gales develop in the northwest later Saturday. Winds are likely to increase to severe gale north of 55 North later Sunday, perhaps storm for a time north of 58 North, gradating to strong winds in the south of Cullercoats

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  3. Portpatrick

    A large low pressure is expected to lie in the vicinity of Iceland late on Thursday, with this feature having multiple centres, the deepest with central pressure near 975. The main low is expected to maintain its position over Iceland as it deepens rapidly to near 960 on Saturday, maintaining this depth through Sunday. This main low feature will be cast in opposition to an intense high near the Baltic States throughout, with the high intensifying from 1035 to near 1045 through the period. All areas will see strong winds through the period, although they will periodically fall light in Southeast Iceland. Gales are possible for a time north of 55 North late Thursday and Friday, becoming more sustained and periodically affecting all Portpatrick areas through Saturday, with widespread severe gales and isolated storm force winds in Atlantic Portpatrick areas late Saturday and into Sunday

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Last Updated at 23:40 UTC on Tuesday 21 October