Y Tywydd Dyfroedd Gyda'r Glannau

Gosodiadau
Iaith

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

Summary

Low pressure centred over the North Sea will move away slowly southeastwards allowing north to northwesterly gales to gradually ease during the next 24 hours.

* 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

    00:00 UTC Fri 15th Dec – 23:59 UTC Fri 15th Dec

    • Wind

      Northerly or northeasterly 5 to 7, occasionally gale 8 at first in north, then backing northwesterly.
    • Sea State

      Slight or moderate in inner Moray Firth, otherwise moderate or rough, but very rough at first to west and north of Orkney.
    • Weather

      Showers, becoming wintry.
    • Visibility

      Good, occasionally poor.

    00:00 UTC Sat 16th Dec – 23:59 UTC Sat 16th Dec

    • Wind

      Northwest 5 or 6 backing west 3 or 4, then southwest 4 or 5 later.
    • Sea State

      Moderate or rough at first except in Moray Firth, otherwise slight or moderate.
    • Weather

      Showers, wintry at first.
    • Visibility

      Good, occasionally moderate.

    Issued at 00:00 UTC on Friday 15th Dec

  2. Rattray Head to Berwick on Tweed * warning

    Rattray Head to Berwick on Tweed

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    Strong wind warning

    00:00 UTC Fri 15th Dec – 23:59 UTC Fri 15th Dec

    • Wind

      North or northwest 5 to 7, occasionally 4 at first.
    • Sea State

      Slight or moderate, becoming moderate or rough in far north and far south.
    • Weather

      Showers, becoming wintry.
    • Visibility

      Good, occasionally moderate.

    00:00 UTC Sat 16th Dec – 23:59 UTC Sat 16th Dec

    • Wind

      Northwest 5 or 6 decreasing 4, then backing west or southwest 3 or 4 later.
    • Sea State

      Rough at first near Rattray Head, otherwise slight or moderate.
    • Weather

      Wintry showers then fair.
    • Visibility

      Good.

    Issued at 00:00 UTC on Friday 15th Dec

  3. Berwick on Tweed to Whitby * warning

    Berwick on Tweed to Whitby

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    Strong wind warning

    00:00 UTC Fri 15th Dec – 23:59 UTC Fri 15th Dec

    • Wind

      North 5 to 7, occasionally 4 at first, then backing northwest later.
    • Sea State

      Slight or moderate, becoming rough.
    • Weather

      Showers.
    • Visibility

      Good, occasionally moderate.

    00:00 UTC Sat 16th Dec – 23:59 UTC Sat 16th Dec

    • Wind

      Northwest 5 or 6 decreasing 4, then backing west 3 or 4 later.
    • Sea State

      Rough becoming moderate.
    • Weather

      Showers then fair.
    • Visibility

      Good.

    Issued at 00:00 UTC on Friday 15th Dec

  4. Whitby to Gibraltar Point * warning

    Whitby to Gibraltar Point

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    Strong wind warning

    00:00 UTC Fri 15th Dec – 23:59 UTC Fri 15th Dec

    • Wind

      North or northwest 4 or 5 increasing 5 to 7.
    • Sea State

      Slight, becoming moderate or rough.
    • Weather

      Showers.
    • Visibility

      Good, occasionally moderate.

    00:00 UTC Sat 16th Dec – 23:59 UTC Sat 16th Dec

    • Wind

      Northwest 5 or 6, occasionally 7 at first, then backing west 4 or 5 later.
    • Sea State

      Rough at first in north, otherwise moderate.
    • Weather

      Showers, becoming fair later.
    • Visibility

      Good.

    Issued at 00:00 UTC on Friday 15th Dec

  5. Gibraltar Point to North Foreland * warning

    Gibraltar Point to North Foreland

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    Strong wind warning

    00:00 UTC Fri 15th Dec – 23:59 UTC Fri 15th Dec

    • Wind

      Westerly veering northerly or northwesterly, 4 or 5, occasionally 6 later.
    • Sea State

      Slight or moderate.
    • Weather

      Showers.
    • Visibility

      Good, occasionally moderate.

    00:00 UTC Sat 16th Dec – 23:59 UTC Sat 16th Dec

    • Wind

      Northwesterly 5 or 6, occasionally 7 at first in north, decreasing 4 at times later.
    • Sea State

      Slight or moderate, becoming rough for a time at first near northeast Norfolk.
    • Weather

      Showers.
    • Visibility

      Good.

    Issued at 00:00 UTC on Friday 15th Dec

  6. North Foreland to Selsey Bill * warning

    North Foreland to Selsey Bill

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    Strong wind warning

    00:00 UTC Fri 15th Dec – 23:59 UTC Fri 15th Dec

    • Wind

      Westerly veering northerly or northwesterly, 5 to 7, occasionally 4 at first.
    • Sea State

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

      Showers, becoming fair later.
    • Visibility

      Good, occasionally moderate at first.

    00:00 UTC Sat 16th Dec – 23:59 UTC Sat 16th Dec

    • Wind

      Northwesterly 5 or 6 decreasing 4 or 5.
    • Sea State

      Slight or moderate.
    • Weather

      Fair.
    • Visibility

      Good.

    Issued at 00:00 UTC on Friday 15th Dec

  7. Selsey Bill to Lyme Regis * warning

    Selsey Bill to Lyme Regis

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    Strong wind warning

    00:00 UTC Fri 15th Dec – 23:59 UTC Fri 15th Dec

    • Wind

      Westerly or northwesterly 5 to 7, occasionally gale 8 at first in west, veering northerly or northwesterly 5 or 6 later.
    • Sea State

      Moderate or rough becoming slight or moderate.
    • Weather

      Showers, becoming fair later.
    • Visibility

      Good, occasionally moderate at first.

    00:00 UTC Sat 16th Dec – 23:59 UTC Sat 16th Dec

    • Wind

      Northwest 4 or 5, increasing 6 at times.
    • Sea State

      Slight or moderate.
    • Weather

      Fair.
    • Visibility

      Good.

    Issued at 00:00 UTC on Friday 15th 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

    00:00 UTC Fri 15th Dec – 23:59 UTC Fri 15th Dec

    • Wind

      Northwesterly 6 to gale 8, occasionally severe gale 9 at first in west, decreasing 5 at times in east.
    • Sea State

      Very rough or high until later in far west, otherwise moderate or rough, occasionally slight later in east.
    • Weather

      Showers, squally at first.
    • Visibility

      Moderate or good, occasionally poor at first near the Isles of Scilly.

    00:00 UTC Sat 16th Dec – 23:59 UTC Sat 16th Dec

    • Wind

      North or northwest 5 or 6 decreasing 4 or 5, then backing west 4 later.
    • Sea State

      Rough at first in far west, otherwise slight or moderate.
    • Weather

      Showers.
    • Visibility

      Good.

    Issued at 00:00 UTC on Friday 15th 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

    00:00 UTC Fri 15th Dec – 23:59 UTC Fri 15th Dec

    • Wind

      Westerly or northwesterly 6 to gale 8, occasionally severe gale 9 at first in west, veering northerly 5 to 7.
    • Sea State

      Rough or very rough at first in west, otherwise moderate or rough.
    • Weather

      Showers, squally at first.
    • Visibility

      Good, occasionally moderate at first.

    00:00 UTC Sat 16th Dec – 23:59 UTC Sat 16th Dec

    • Wind

      North backing west 4 or 5, occasionally 6 at first.
    • Sea State

      Rough at first near Cornwall, otherwise slight or moderate.
    • Weather

      Showers.
    • Visibility

      Good.

    Issued at 00:00 UTC on Friday 15th 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

    00:00 UTC Fri 15th Dec – 23:59 UTC Fri 15th Dec

    • Wind

      Northwest veering north 6 to gale 8, occasionally severe gale 9 at first, decreasing 5 at times later.
    • Sea State

      Rough or very rough becoming moderate or rough.
    • Weather

      Showers.
    • Visibility

      Good, occasionally moderate at first.

    00:00 UTC Sat 16th Dec – 23:59 UTC Sat 16th Dec

    • Wind

      North backing northwest 5 or 6, then backing west 4 or 5 later.
    • Sea State

      Moderate or rough becoming slight or moderate.
    • Weather

      Showers, becoming fair later.
    • Visibility

      Good.

    Issued at 00:00 UTC on Friday 15th 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

    00:00 UTC Fri 15th Dec – 23:59 UTC Fri 15th Dec

    • Wind

      Cyclonic becoming north or northwest, 5 to 7, decreasing 4 at times.
    • Sea State

      Rough at first in south, otherwise slight or moderate.
    • Weather

      Showers.
    • Visibility

      Good, occasionally moderate at first.

    00:00 UTC Sat 16th Dec – 23:59 UTC Sat 16th Dec

    • Wind

      North or northwest 4 or 5, occasionally 6 at first, then backing west or northwest 3 or 4 later.
    • Sea State

      Slight or moderate.
    • Weather

      Showers.
    • Visibility

      Good.

    Issued at 00:00 UTC on Friday 15th Dec

  12. Isle of Man * warning

    Isle of Man

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    Strong wind warning

    00:00 UTC Fri 15th Dec – 23:59 UTC Fri 15th Dec

    • Wind

      Northerly or northwesterly 5 to 7, occasionally gale 8 at first in west, decreasing 5 at times later.
    • Sea State

      Moderate or rough, becoming moderate later.
    • Weather

      Showers.
    • Visibility

      Good, occasionally moderate.

    00:00 UTC Sat 16th Dec – 23:59 UTC Sat 16th Dec

    • Wind

      North or northwest 4 or 5, increasing 6 at times, then backing west or southwest 3 or 4 later.
    • Sea State

      Moderate, becoming slight or moderate.
    • Weather

      Showers.
    • Visibility

      Good.

    Issued at 00:00 UTC on Friday 15th Dec

  13. Lough Foyle to Carlingford Lough * warning

    Lough Foyle to Carlingford Lough

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    Strong wind warning

    00:00 UTC Fri 15th Dec – 23:59 UTC Fri 15th Dec

    • Wind

      Northerly or northwesterly 6 to gale 8, occasionally severe gale 9 at first in north, decreasing 4 or 5 later.
    • Sea State

      Very rough at first in north, otherwise moderate or rough.
    • Weather

      Showers, squally at first.
    • Visibility

      Good, occasionally moderate at first.

    00:00 UTC Sat 16th Dec – 23:59 UTC Sat 16th Dec

    • Wind

      Northwest 4 or 5, occasionally 6 at first, backing west or southwest 3 or 4 later.
    • Sea State

      Moderate or rough at first in north, otherwise slight or moderate.
    • Weather

      Showers.
    • Visibility

      Good.

    Issued at 00:00 UTC on Friday 15th 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

    00:00 UTC Fri 15th Dec – 23:59 UTC Fri 15th Dec

    • Wind

      Northerly 5 to 7, occasionally gale 8 at first except in Firth of Clyde, backing northwesterly 4 or 5 later.
    • Sea State

      Slight or moderate in Firth of Clyde, otherwise moderate or rough.
    • Weather

      Showers.
    • Visibility

      Good, occasionally moderate at first.

    00:00 UTC Sat 16th Dec – 23:59 UTC Sat 16th Dec

    • Wind

      Northwesterly 4 or 5, backing westerly or southwesterly 3 or 4 later.
    • Sea State

      Slight or moderate, becoming slight.
    • Weather

      Showers.
    • Visibility

      Good.

    Issued at 00:00 UTC on Friday 15th Dec

  15. Mull of Kintyre to Ardnamurchan Point * warning

    Mull of Kintyre to Ardnamurchan Point

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    Strong wind warning

    00:00 UTC Fri 15th Dec – 23:59 UTC Fri 15th Dec

    • Wind

      North 6 to gale 8, occasionally severe gale 9 at first, backing northwest 4 or 5 later.
    • Sea State

      Rough or very rough becoming moderate or rough.
    • Weather

      Showers.
    • Visibility

      Good, occasionally moderate at first.

    00:00 UTC Sat 16th Dec – 23:59 UTC Sat 16th Dec

    • Wind

      Northwest, backing southwest later, 3 or 4, increasing 5 at times.
    • Sea State

      Moderate or rough becoming slight or moderate.
    • Weather

      Showers.
    • Visibility

      Good.

    Issued at 00:00 UTC on Friday 15th Dec

  16. The Minch * warning

    The Minch

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    Strong wind warning

    00:00 UTC Fri 15th Dec – 23:59 UTC Fri 15th Dec

    • Wind

      Northerly 7 or gale 8, occasionally severe gale 9 at first in south, decreasing 5 or 6, backing northwesterly 4 later.
    • Sea State

      Very rough at first in north, otherwise moderate or rough becoming slight or moderate.
    • Weather

      Showers, becoming wintry.
    • Visibility

      Moderate or good, occasionally poor later.

    00:00 UTC Sat 16th Dec – 23:59 UTC Sat 16th Dec

    • Wind

      Northwest, backing southwest later, 3 or 4, increasing 5 at times.
    • Sea State

      Slight or moderate.
    • Weather

      Showers, wintry at first.
    • Visibility

      Good, occasionally moderate.

    Issued at 00:00 UTC on Friday 15th 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

    00:00 UTC Fri 15th Dec – 23:59 UTC Fri 15th Dec

    • Wind

      Northerly 7 or gale 8, occasionally severe gale 9 at first in south, decreasing 5 or 6, backing northwesterly 4 later.
    • Sea State

      Very rough or high becoming moderate or rough.
    • Weather

      Showers, becoming wintry.
    • Visibility

      Moderate or good, occasionally poor.

    00:00 UTC Sat 16th Dec – 23:59 UTC Sat 16th Dec

    • Wind

      Northwest, backing southwest later, 3 or 4, increasing 5 at times.
    • Sea State

      Moderate or rough, becoming moderate.
    • Weather

      Showers, wintry at first.
    • Visibility

      Good, occasionally moderate.

    Issued at 00:00 UTC on Friday 15th Dec

  18. Shetland Isles * warning

    Shetland Isles

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    Strong wind warning

    00:00 UTC Fri 15th Dec – 23:59 UTC Fri 15th Dec

    • Wind

      Northeast backing northwest 5 to 7.
    • Sea State

      Rough or very rough becoming moderate or rough.
    • Weather

      Showers, becoming wintry.
    • Visibility

      Good, occasionally moderate at first.

    00:00 UTC Sat 16th Dec – 23:59 UTC Sat 16th Dec

    • Wind

      --
    • Sea State

      --
    • Weather

      --
    • Visibility

      --

    Issued at 00:00 UTC on Friday 15th Dec

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

    Gale Warnings in operation for Sea Area Fair Isle: Northeasterly severe gale force 9 decreasing gale force 8 soon, issued 1544 UTC on Thursday 14 December 2017

    00:00 UTC Fri 15th Dec – 11:59 UTC Fri 15th Dec

    • Wind

      North or northeast 5 to 7
    • Sea State

      Rough or very rough, locally slight in shelter east of Shetland
    • Weather

      Showers, wintry later
    • Visibility

      Good, occasionally moderate or poor

    12:00 UTC Fri 15th Dec – 23:59 UTC Fri 15th Dec

    • Wind

      North or northwest 5 to 7
    • Sea State

      Rough or very rough, locally slight in shelter east of Shetland
    • Weather

      Wintry showers
    • Visibility

      Good, occasionally moderate or poor

    Issued at 00:00 UTC on Friday 15th Dec

  19. The Channel Islands * warning

    The Channel Islands

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    Strong wind warning

    00:00 UTC Fri 15th Dec – 23:59 UTC Fri 15th Dec

    • Wind

      West or northwest 6 or 7, occasionally gale 8 with gusts to 55kt, increasing 7 or gale 8 for a time late morning, veering north by noon, then decreasing 5 or 6 in the evening.
    • Sea State

      Rough to very rough, decreasing rather rough to rough in the afternoon, and moderate to rather rough by Saturday.
    • Weather

      Scattered squally rain or hail showers, becoming less frequent by midday, risk of thunder, mainly am.
    • Visibility

      Moderate or good, occasionally poor in showers.

    00:00 UTC Sat 16th Dec – 23:59 UTC Sat 16th Dec

    • Wind

      Northerly 5 or 6, decreasing 4 or 5 late morning, then backing northwesterly from late afternoon, perhaps locally 6 in the north of the area.
    • Sea State

      Moderate to rather rough, decreasing moderate by noon, with swell.
    • Weather

      Isolated showers.
    • Visibility

      Good, occasionally moderate or poor in showers.

    Issued at 00:00 UTC on Friday 15th Dec