Y Tywydd Dyfroedd Gyda'r Glannau

Gosodiadau
Iaith

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

Summary

The British Isles is in a southwesterly airflow, with a slow moving front bringing rain and drizzle at times with poor visibility, but showers and clearer conditions will push in to the northwest.

* Wind or gale warning issued

  1. From Cape Wrath to Rattray Head including Orkney * warning

    From Cape Wrath to Rattray Head including Orkney

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    Strong wind warning

    12:00 UTC Fri 9th Dec – 11:59 UTC Sat 10th Dec

    • Wind

      South or southwest 5 to 7, occasionally 4 at first.
    • Sea State

      Moderate, but rough or very rough near Orkney.
    • Weather

      Occasional rain, then showers.
    • Visibility

      Moderate or good, occasionally poor at first.

    12:00 UTC Sat 10th Dec – 11:59 UTC Sun 11th Dec

    • Wind

      Southwest, veering west 5 or 6, occasionally 7 for a time.
    • Sea State

      Rough or very rough in northwest, otherwise slight or moderate.
    • Weather

      Occasional rain or showers.
    • Visibility

      Moderate or good.

    Issued at 12:00 UTC on Friday 9th Dec

  2. Rattray Head to Berwick on Tweed * warning

    Rattray Head to Berwick on Tweed

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    Strong wind warning

    12:00 UTC Fri 9th Dec – 11:59 UTC Sat 10th Dec

    • Wind

      South or southwest 5 or 6.
    • Sea State

      Moderate.
    • Weather

      Occasional rain, then showers later.
    • Visibility

      Moderate or good, occasionally poor at first.

    12:00 UTC Sat 10th Dec – 11:59 UTC Sun 11th Dec

    • Wind

      Southwest veering west later, 5 or 6, occasionally 7 near Rattray Head.
    • Sea State

      Slight or moderate.
    • Weather

      Showers.
    • Visibility

      Moderate or good.

    Issued at 12:00 UTC on Friday 9th Dec

  3. Berwick on Tweed to Whitby * warning

    Berwick on Tweed to Whitby

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    Strong wind warning

    12:00 UTC Fri 9th Dec – 11:59 UTC Sat 10th Dec

    • Wind

      South or southwest 4 or 5, occasionally 6 at first.
    • Sea State

      Slight.
    • Weather

      Occasional rain, then fair later.
    • Visibility

      Moderate or good, occasionally poor.

    12:00 UTC Sat 10th Dec – 11:59 UTC Sun 11th Dec

    • Wind

      West or southwest 4 or 5, increasing 6 for a time.
    • Sea State

      Smooth or slight, occasionally moderate later.
    • Weather

      Showers.
    • Visibility

      Moderate or good.

    Issued at 12:00 UTC on Friday 9th Dec

  4. Whitby to Gibraltar Point * warning

    Whitby to Gibraltar Point

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    Strong wind warning

    12:00 UTC Fri 9th Dec – 11:59 UTC Sat 10th Dec

    • Wind

      Southwest 5 or 6, decreasing 3 or 4.
    • Sea State

      Slight.
    • Weather

      Occasional rain.
    • Visibility

      Moderate or poor.

    12:00 UTC Sat 10th Dec – 11:59 UTC Sun 11th Dec

    • Wind

      Southwest 3 or 4, veering west and increasing 5 or 6.
    • Sea State

      Smooth or slight, occasionally moderate later.
    • Weather

      Occasional rain, fog patches at first, then fair later.
    • Visibility

      Moderate or good, occasionally very poor at first.

    Issued at 12:00 UTC on Friday 9th Dec

  5. Gibraltar Point to North Foreland * warning

    Gibraltar Point to North Foreland

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    Strong wind warning

    12:00 UTC Fri 9th Dec – 11:59 UTC Sat 10th Dec

    • Wind

      Southwesterly 5 or 6, decreasing 3 or 4.
    • Sea State

      Slight, occasionally moderate later.
    • Weather

      Occasional rain later.
    • Visibility

      Moderate or poor.

    12:00 UTC Sat 10th Dec – 11:59 UTC Sun 11th Dec

    • Wind

      Southwesterly 3 or 4, veering westerly and increasing 5 or 6.
    • Sea State

      Smooth or slight, occasionally moderate.
    • Weather

      Rain at times, fog patches, then fair later.
    • Visibility

      Moderate or good, occasionally very poor.

    Issued at 12:00 UTC on Friday 9th Dec

  6. North Foreland to Selsey Bill * warning

    North Foreland to Selsey Bill

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    Strong wind warning

    12:00 UTC Fri 9th Dec – 11:59 UTC Sat 10th Dec

    • Wind

      Southwesterly 5 or 6, decreasing 4 at times.
    • Sea State

      Moderate.
    • Weather

      Occasional rain later.
    • Visibility

      Moderate or poor,.

    12:00 UTC Sat 10th Dec – 11:59 UTC Sun 11th Dec

    • Wind

      Southwesterly 5 or 6, increasing 7 for a time, then veering westerly later.
    • Sea State

      Slight or moderate, occasionally rough.
    • Weather

      Occasional rain, fog patches, then fair later.
    • Visibility

      Moderate or good, occasionally very poor.

    Issued at 12:00 UTC on Friday 9th Dec

  7. Selsey Bill to Lyme Regis * warning

    Selsey Bill to Lyme Regis

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    Strong wind warning

    12:00 UTC Fri 9th Dec – 11:59 UTC Sat 10th Dec

    • Wind

      Southwest 5 or 6, decreasing 4 at times.
    • Sea State

      Moderate, occasionally rough later.
    • Weather

      Occasional rain later.
    • Visibility

      Moderate or poor.

    12:00 UTC Sat 10th Dec – 11:59 UTC Sun 11th Dec

    • Wind

      Southwest 5 or 6, increasing 7 for a time, veering west 4 or 5 later.
    • Sea State

      Moderate or rough, occasionally slight later.
    • Weather

      Occasional rain, fog patches, then fair later.
    • Visibility

      Moderate or good, occasionally very poor.

    Issued at 12:00 UTC on Friday 9th Dec

  8. Lyme Regis to Lands End including the Isles of Scilly * warning

    Lyme Regis to Lands End including the Isles of Scilly

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    Strong wind warning

    12:00 UTC Fri 9th Dec – 11:59 UTC Sat 10th Dec

    • Wind

      Southwest 5 or 6, but variable 3 or 4 for a time overnight.
    • Sea State

      Moderate or rough, occasionally very rough in west.
    • Weather

      Drizzle, rain later.
    • Visibility

      Moderate or poor.

    12:00 UTC Sat 10th Dec – 11:59 UTC Sun 11th Dec

    • Wind

      South or southwest 5 or 6, veering west or northwest 4 or 5, decreasing 3 at times later.
    • Sea State

      Moderate or rough, occasionally very rough at first in west.
    • Weather

      Occasional rain, becoming fair later.
    • Visibility

      Moderate or good, occasionally poor.

    Issued at 12:00 UTC on Friday 9th Dec

  9. Lands End to St Davids Head including the Bristol Channel * warning

    Lands End to St Davids Head including the Bristol Channel

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    Strong wind warning

    12:00 UTC Fri 9th Dec – 11:59 UTC Sat 10th Dec

    • Wind

      Southwest 5 or 6, becoming cyclonic 3 or 4, occasionally 5 later.
    • Sea State

      Moderate or rough, occasionally very rough in west.
    • Weather

      Occasional rain.
    • Visibility

      Moderate or poor, occasionally good.

    12:00 UTC Sat 10th Dec – 11:59 UTC Sun 11th Dec

    • Wind

      Cyclonic, becoming west or northwest 4 or 5, increasing 6 for a time.
    • Sea State

      Moderate or rough.
    • Weather

      Occasional rain, becoming fair later.
    • Visibility

      Moderate or good, occasionally poor.

    Issued at 12:00 UTC on Friday 9th Dec

  10. St Davids Head to Great Ormes Head, including St Georges Channel * warning

    St Davids Head to Great Ormes Head, including St Georges Channel

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    Strong wind warning

    12:00 UTC Fri 9th Dec – 11:59 UTC Sat 10th Dec

    • Wind

      Southwest 5 or 6, decreasing 3 or 4.
    • Sea State

      Moderate or rough.
    • Weather

      Occasional rain.
    • Visibility

      Moderate or good, occasionally poor.

    12:00 UTC Sat 10th Dec – 11:59 UTC Sun 11th Dec

    • Wind

      Southwesterly 3 or 4, veering westerly or northwesterly 4 or 5, occasionally 6 for a time in north.
    • Sea State

      Slight or moderate, occasionally rough at first in south.
    • Weather

      Occasional rain.
    • Visibility

      Moderate or good, occasionally poor.

    Issued at 12:00 UTC on Friday 9th Dec

  11. Great Ormes Head to the Mull of Galloway * warning

    Great Ormes Head to the Mull of Galloway

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    Strong wind warning

    12:00 UTC Fri 9th Dec – 11:59 UTC Sat 10th Dec

    • Wind

      Southwest 5 or 6, decreasing 4 at times later.
    • Sea State

      Moderate or rough, occasionally slight later.
    • Weather

      Occasional rain.
    • Visibility

      Moderate or good, occasionally poor.

    12:00 UTC Sat 10th Dec – 11:59 UTC Sun 11th Dec

    • Wind

      Southwest 4 or 5, veering west 5 or 6.
    • Sea State

      Slight or moderate.
    • Weather

      Occasional rain in south.
    • Visibility

      Moderate or good, occasionally poor in south.

    Issued at 12:00 UTC on Friday 9th Dec

  12. Isle of Man * warning

    Isle of Man

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    Strong wind warning

    12:00 UTC Fri 9th Dec – 11:59 UTC Sat 10th Dec

    • Wind

      Southwest 5 or 6, decreasing 4 at times later.
    • Sea State

      Moderate.
    • Weather

      Occasional rain, mainly fair later.
    • Visibility

      Moderate or poor, becoming good later.

    12:00 UTC Sat 10th Dec – 11:59 UTC Sun 11th Dec

    • Wind

      Southwest 4 or 5, veering west 5 or 6.
    • Sea State

      Slight or moderate.
    • Weather

      Fair.
    • Visibility

      Good.

    Issued at 12:00 UTC on Friday 9th Dec

  13. Lough Foyle to Carlingford Lough * warning

    Lough Foyle to Carlingford Lough

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    Strong wind warning

    12:00 UTC Fri 9th Dec – 11:59 UTC Sat 10th Dec

    • Wind

      Southerly or southwesterly 5 or 6, decreasing 4 at times later in east.
    • Sea State

      Moderate occasionally rough, but rough or very rough west of rathlin island.
    • Weather

      Occasional rain at first, then showers.
    • Visibility

      Moderate or good, occasionally poor at first.

    12:00 UTC Sat 10th Dec – 11:59 UTC Sun 11th Dec

    • Wind

      Southwest veering west, 5 or 6.
    • Sea State

      Slight or moderate, occasionally rough in northwest.
    • Weather

      Showers.
    • Visibility

      Good.

    Issued at 12:00 UTC on Friday 9th Dec

  14. The Mull of Galloway to Mull of Kintyre including the Firth of Clyde and the North Channel * warning

    The Mull of Galloway to Mull of Kintyre including the Firth of Clyde and the North Channel

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    Strong wind warning

    12:00 UTC Fri 9th Dec – 11:59 UTC Sat 10th Dec

    • Wind

      Southerly or southwesterly 5 or 6, decreasing 4 at times later.
    • Sea State

      Slight or moderate, becoming rough or very rough except in Firth of Clyde.
    • Weather

      Occasional rain at first, then showers.
    • Visibility

      Moderate or good, occasionally poor at first.

    12:00 UTC Sat 10th Dec – 11:59 UTC Sun 11th Dec

    • Wind

      Southwest veering west, 5 or 6, occasionally 7 in north =.
    • Sea State

      Slight or moderate, occasionally rough near Mull of Kintyre.
    • Weather

      Showers.
    • Visibility

      Good.

    Issued at 12:00 UTC on Friday 9th Dec

  15. Mull of Kintyre to Ardnamurchan Point * warning

    Mull of Kintyre to Ardnamurchan Point

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    Strong wind warning

    12:00 UTC Fri 9th Dec – 11:59 UTC Sat 10th Dec

    • Wind

      Southwesterly 5 to 7, occasionally gale 8 in north.
    • Sea State

      Moderate or rough, becoming very rough or high.
    • Weather

      Showers.
    • Visibility

      Moderate, occasionally good in shelter.

    12:00 UTC Sat 10th Dec – 11:59 UTC Sun 11th Dec

    • Wind

      Southwesterly veering westerly, 5 to 7, occasionally gale 8 at first in north.
    • Sea State

      Moderate at times in south, otherwise rough or very rough, occasionally high at first in northwest.
    • Weather

      Showers.
    • Visibility

      Good.

    Issued at 12:00 UTC on Friday 9th Dec

  16. The Minch * warning

    The Minch

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    Strong wind warning

    12:00 UTC Fri 9th Dec – 11:59 UTC Sat 10th Dec

    • Wind

      Southwest 5 to 7, increasing gale 8 for a time.
    • Sea State

      Moderate or rough, becoming very rough or high in south.
    • Weather

      Showers.
    • Visibility

      Moderate or good.

    12:00 UTC Sat 10th Dec – 11:59 UTC Sun 11th Dec

    • Wind

      Southwest veering west 6 to gale 8, decreasing 5 at times later.
    • Sea State

      Moderate or rough, occasionally very rough in south.
    • Weather

      Occasional rain or showers.
    • Visibility

      Moderate or good.

    Issued at 12:00 UTC on Friday 9th Dec

  17. Ardnamurchan Point to Cape Wrath including the Outer Hebrides * warning

    Ardnamurchan Point to Cape Wrath including the Outer Hebrides

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    Strong wind warning

    12:00 UTC Fri 9th Dec – 11:59 UTC Sat 10th Dec

    • Wind

      Southwest 5 to 7, increasing gale 8 for a time.
    • Sea State

      Rough, becoming very rough or high.
    • Weather

      Showers.
    • Visibility

      Moderate.

    12:00 UTC Sat 10th Dec – 11:59 UTC Sun 11th Dec

    • Wind

      Southwest veering west 6 to gale 8, decreasing 5 at times later.
    • Sea State

      Very rough or high.
    • Weather

      Occasional rain or showers.
    • Visibility

      Moderate or good.

    Issued at 12:00 UTC on Friday 9th Dec

  18. Shetland Isles * warning

    Shetland Isles

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    Strong wind warning

    12:00 UTC Fri 9th Dec – 11:59 UTC Sat 10th Dec

    • Wind

      South or southeast 4 or 5, veering southwest 5 to 7, occasionally gale 8 later.
    • Sea State

      Rough or very rough, occasionally moderate at first in east.
    • Weather

      Rain at first, then showers.
    • Visibility

      Moderate or good, occasionally poor at first.

    12:00 UTC Sat 10th Dec – 11:59 UTC Sun 11th Dec

    • Wind

      --
    • Sea State

      --
    • Weather

      --
    • Visibility

      --

    Issued at 12:00 UTC on Friday 9th Dec

    For coastal areas up to 60 nautical miles from Lerwick, Shetland

    Gale Warnings in operation for Sea Area Fair Isle: Southwesterly gale force 8 expected later. (1000z)

    12:00 UTC Fri 9th Dec – 23:59 UTC Fri 9th Dec

    • Wind

      Southerly or southeasterly 4 or 5, veering southwesterly 5 or 6
    • Sea State

      Moderate at first in east, otherwise rough or very rough
    • Weather

      Occasional rain then showers.
    • Visibility

      Moderate or good, occasionally poor at first.

    00:00 UTC Sat 10th Dec – 11:59 UTC Sat 10th Dec

    • Wind

      Southwesterly 5 to 7, occasionally gale 8 later.
    • Sea State

      Rough or very rough, occasionally high later in far west.
    • Weather

      Showers.
    • Visibility

      Moderate or good.

    Issued at 12:00 UTC on Friday 9th Dec

  19. The Channel Islands * warning

    The Channel Islands

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    Strong wind warning

    12:00 UTC Fri 9th Dec – 11:59 UTC Sat 10th Dec

    • Wind

      Southerly 4 to 5, perhaps 6 at times in the north, increasing 5 to 6 Saturday morning.
    • Sea State

      Slight to moderate, locally rather rough in the north, becoming moderate to rather rough Saturday morning.
    • Weather

      Misty with fog patches at times.
    • Visibility

      Moderate to poor, occasionally very poor.

    12:00 UTC Sat 10th Dec – 11:59 UTC Sun 11th Dec

    • Wind

      South to southwest 5 to 6, perhaps with gusts to 35kt, veering northwest in the evening, decreasing 4 to 5 by dawn, backing west 2 to 4 by midday.
    • Sea State

      Moderate to rather rough with a moderate swell, becoming slight to moderate on Sunday.
    • Weather

      Risk of mist patches outbreaks of rain by early evening, clearing around midnight.
    • Visibility

      Mainly moderate, occasionally poor in rain or any mist, becoming good later.

    Issued at 12:00 UTC on Friday 9th Dec

From Cape Wrath to Rattray Head including Orkney

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Strong wind warning

12:00 UTC Fri 9th Dec – 11:59 UTC Sat 10th Dec

  • Wind

    South or southwest 5 to 7, occasionally 4 at first.
  • Sea State

    Moderate, but rough or very rough near Orkney.
  • Weather

    Occasional rain, then showers.
  • Visibility

    Moderate or good, occasionally poor at first.

12:00 UTC Sat 10th Dec – 11:59 UTC Sun 11th Dec

  • Wind

    Southwest, veering west 5 or 6, occasionally 7 for a time.
  • Sea State

    Rough or very rough in northwest, otherwise slight or moderate.
  • Weather

    Occasional rain or showers.
  • Visibility

    Moderate or good.

Issued at 12:00 UTC on Friday 9th Dec