Y Tywydd Dyfroedd Gyda'r Glannau

Gosodiadau
Iaith

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

Summary

Low pressure near Shetland will continue eastwards, reaching Norway by Wednesday afternoon. A second deepening low will move eastwards across the United Kingdom during Thursday bringing severe gales or storm force winds to some waters.

* 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

    06:00 UTC Wed 22nd Feb – 05:59 UTC Thu 23rd Feb

    • Wind

      West gale 8 to storm 10, occasionally violent storm 11 at first near Orkney, veering northwest 7 to severe gale 9, then veering east 4 or 5 later.
    • Sea State

      In Moray Firth moderate or rough, becoming very rough for a time, otherwise high or very high becoming very rough later.
    • Weather

      Squally showers.
    • Visibility

      Moderate or good, occasionally poor in north.

    06:00 UTC Thu 23rd Feb – 05:59 UTC Fri 24th Feb

    • Wind

      East 4 or 5, becoming cyclonic 5 or 6.
    • Sea State

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

      Occasional rain or showers.
    • Visibility

      Moderate or good.

    Issued at 06:00 UTC on Wednesday 22nd Feb

  2. Rattray Head to Berwick on Tweed * warning

    Rattray Head to Berwick on Tweed

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    Strong wind warning

    06:00 UTC Wed 22nd Feb – 05:59 UTC Thu 23rd Feb

    • Wind

      West or northwest 6 to gale 8, occasionally severe gale 9 at first near Rattray Head, veering east 4 later.
    • Sea State

      Moderate or rough, becoming slight in south, but very rough for a time near Rattray Head.
    • Weather

      Showers then fair.
    • Visibility

      Good.

    06:00 UTC Thu 23rd Feb – 05:59 UTC Fri 24th Feb

    • Wind

      East 4, backing northeast 6 to gale 8, then backing west 5 or 6 later.
    • Sea State

      Moderate or rough, but slight at first in south.
    • Weather

      Fair then rain or showers.
    • Visibility

      Moderate or good, occasionally poor.

    Issued at 06:00 UTC on Wednesday 22nd Feb

  3. Berwick on Tweed to Whitby * warning

    Berwick on Tweed to Whitby

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    Strong wind warning

    06:00 UTC Wed 22nd Feb – 05:59 UTC Thu 23rd Feb

    • Wind

      West 5 to 7, occasionally gale 8 at first, veering east 5 or 6 later.
    • Sea State

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

      Rain later.
    • Visibility

      Good, becoming moderate or poor later.

    06:00 UTC Thu 23rd Feb – 05:59 UTC Fri 24th Feb

    • Wind

      East 5 or 6, becoming cyclonic 6 to gale 8, then becoming northwest 5 or 6 later.
    • Sea State

      Slight or moderate, becoming rough or very rough for a time.
    • Weather

      Rain then showers.
    • Visibility

      Moderate or good, occasionally poor.

    Issued at 06:00 UTC on Wednesday 22nd Feb

  4. Whitby to Gibraltar Point * warning

    Whitby to Gibraltar Point

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    Strong wind warning

    06:00 UTC Wed 22nd Feb – 05:59 UTC Thu 23rd Feb

    • Wind

      West 5 to 7, occasionally gale 8 at first near Whitby, becoming cyclonic 5 or 6 later.
    • Sea State

      Slight or moderate.
    • Weather

      Rain at times.
    • Visibility

      Moderate or good, occasionally poor later.

    06:00 UTC Thu 23rd Feb – 05:59 UTC Fri 24th Feb

    • Wind

      Cyclonic 5 or 6, increasing 7 to severe gale 9, then becoming northwest 5 or 6 later.
    • Sea State

      Slight or moderate, becoming rough or very rough.
    • Weather

      Rain then showers.
    • Visibility

      Moderate or good, occasionally poor.

    Issued at 06:00 UTC on Wednesday 22nd Feb

  5. Gibraltar Point to North Foreland * warning

    Gibraltar Point to North Foreland

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    Strong wind warning

    06:00 UTC Wed 22nd Feb – 05:59 UTC Thu 23rd Feb

    • Wind

      Southwesterly 5 to 7, becoming variable 4 for a time in north.
    • Sea State

      Moderate, becoming slight for a time.
    • Weather

      Rain or drizzle at times.
    • Visibility

      Moderate or good, occasionally poor.

    06:00 UTC Thu 23rd Feb – 05:59 UTC Fri 24th Feb

    • Wind

      Westerly or southwesterly 5 to 7, increasing gale 8 or severe gale 9, then veering northwesterly 6 to gale 8, decreasing 4 or 5 later.
    • Sea State

      Moderate or rough, occasionally very rough.
    • Weather

      Rain or drizzle then showers.
    • Visibility

      Moderate or good, occasionally poor.

    Issued at 06:00 UTC on Wednesday 22nd Feb

  6. North Foreland to Selsey Bill * warning

    North Foreland to Selsey Bill

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    Strong wind warning

    06:00 UTC Wed 22nd Feb – 05:59 UTC Thu 23rd Feb

    • Wind

      Southwesterly 6 to gale 8.
    • Sea State

      Moderate or rough.
    • Weather

      Rain or drizzle at times.
    • Visibility

      Moderate or good, occasionally poor.

    06:00 UTC Thu 23rd Feb – 05:59 UTC Fri 24th Feb

    • Wind

      Southwesterly 6 to gale 8, veering westerly 7 to severe gale 9, then veering northwesterly 6 to gale 8, decreasing 4 or 5 later.
    • Sea State

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

      Rain or drizzle at first.
    • Visibility

      Moderate or poor, becoming good.

    Issued at 06:00 UTC on Wednesday 22nd Feb

  7. Selsey Bill to Lyme Regis * warning

    Selsey Bill to Lyme Regis

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    Strong wind warning

    06:00 UTC Wed 22nd Feb – 05:59 UTC Thu 23rd Feb

    • Wind

      West or southwest 6 to gale 8.
    • Sea State

      Moderate or rough.
    • Weather

      Rain or drizzle at times.
    • Visibility

      Moderate or good, occasionally poor.

    06:00 UTC Thu 23rd Feb – 05:59 UTC Fri 24th Feb

    • Wind

      West or southwest 6 to gale 8, increasing severe gale 9 for a time, then veering northwest 6 or 7, decreasing 4 or 5 later.
    • Sea State

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

      Rain or drizzle at first.
    • Visibility

      Moderate or poor, becoming good.

    Issued at 06:00 UTC on Wednesday 22nd Feb

  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

    06:00 UTC Wed 22nd Feb – 05:59 UTC Thu 23rd Feb

    • Wind

      West, backing southwest, 5 to 7, perhaps gale 8 later.
    • Sea State

      Slight for a time in shelter, otherwise moderate or rough.
    • Weather

      Rain or drizzle at times.
    • Visibility

      Moderate or good, occasionally poor.

    06:00 UTC Thu 23rd Feb – 05:59 UTC Fri 24th Feb

    • Wind

      Southwest 5 to 7, veering west 7 to severe gale 9, then veering northwest 6 or 7, decreasing 4 or 5 later.
    • Sea State

      Slight later in shelter, otherwise moderate or rough, occasionally very rough at first.
    • Weather

      Rain or drizzle at first.
    • Visibility

      Moderate or good, occasionally poor at first.

    Issued at 06:00 UTC on Wednesday 22nd Feb

  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

    06:00 UTC Wed 22nd Feb – 05:59 UTC Thu 23rd Feb

    • Wind

      West, backing southwest, 5 to 7, perhaps gale 8 later.
    • Sea State

      Moderate or rough.
    • Weather

      Rain or drizzle at times.
    • Visibility

      Moderate or good, occasionally poor.

    06:00 UTC Thu 23rd Feb – 05:59 UTC Fri 24th Feb

    • Wind

      Southwest 5 to 7, veering west 7 to severe gale 9, then veering northwest 6 or 7, decreasing 4 or 5 later.
    • Sea State

      Moderate or rough, becoming very rough or high for a time.
    • Weather

      Rain or drizzle at first.
    • Visibility

      Moderate or good, occasionally poor at first.

    Issued at 06:00 UTC on Wednesday 22nd Feb

  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

    06:00 UTC Wed 22nd Feb – 05:59 UTC Thu 23rd Feb

    • Wind

      Southwesterly 5 to 7, perhaps gale 8 later, becoming variable 4 for a time in north.
    • Sea State

      Moderate or rough, becoming slight for a time in north.
    • Weather

      Rain or drizzle at times.
    • Visibility

      Moderate or good, occasionally poor.

    06:00 UTC Thu 23rd Feb – 05:59 UTC Fri 24th Feb

    • Wind

      Southwesterly 5 to 7, veering westerly or northwesterly gale 8 to storm 10, decreasing 4 or 5 later.
    • Sea State

      Moderate or rough, becoming very rough for a time.
    • Weather

      Showers, rain at first.
    • Visibility

      Good, occasionally poor at first.

    Issued at 06:00 UTC on Wednesday 22nd Feb

  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

    06:00 UTC Wed 22nd Feb – 05:59 UTC Thu 23rd Feb

    • Wind

      West or southwest 5 or 6, becoming variable 3 or 4, then becoming cyclonic 5 to 7 later.
    • Sea State

      Moderate or rough, becoming smooth or slight for a time.
    • Weather

      Rain or drizzle at times.
    • Visibility

      Moderate or good, occasionally poor.

    06:00 UTC Thu 23rd Feb – 05:59 UTC Fri 24th Feb

    • Wind

      Cyclonic 5 to 7, increasing gale 8 to storm 10, then becoming northwest 5 to 7, backing west 4 or 5 later.
    • Sea State

      Moderate or rough, occasionally very rough.
    • Weather

      Squally showers, rain at first.
    • Visibility

      Moderate or good, occasionally poor at first.

    Issued at 06:00 UTC on Wednesday 22nd Feb

  12. Isle of Man * warning

    Isle of Man

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    Strong wind warning

    06:00 UTC Wed 22nd Feb – 05:59 UTC Thu 23rd Feb

    • Wind

      West or southwest 5 or 6, backing southeast 3 or 4, then veering southwest 7 to severe gale 9.
    • Sea State

      Moderate or rough, becoming slight for a time.
    • Weather

      Fair then occasional rain.
    • Visibility

      Good becoming moderate or poor.

    06:00 UTC Thu 23rd Feb – 05:59 UTC Fri 24th Feb

    • Wind

      Southwest 7 to severe gale 9, veering west or northwest 6 or 7.
    • Sea State

      Moderate or rough, occasionally very rough.
    • Weather

      Showers, rain at first.
    • Visibility

      Moderate or good, occasionally poor at first.

    Issued at 06:00 UTC on Wednesday 22nd Feb

  13. Lough Foyle to Carlingford Lough * warning

    Lough Foyle to Carlingford Lough

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    Strong wind warning

    06:00 UTC Wed 22nd Feb – 05:59 UTC Thu 23rd Feb

    • Wind

      Westerly 5 or 6, occasionally 7 at first in far north, becoming cyclonic 5 to 7 later.
    • Sea State

      Slight or moderate, occasionally rough, but very rough for a time in far north.
    • Weather

      Rain or showers.
    • Visibility

      Moderate or good, occasionally poor.

    06:00 UTC Thu 23rd Feb – 05:59 UTC Fri 24th Feb

    • Wind

      Cyclonic 5 to 7, increasing gale 8 to storm 10, then becoming northwesterly 5 to 7, backing westerly 4 or 5 later.
    • Sea State

      Slight or moderate, occasionally rough.
    • Weather

      Rain or squally showers.
    • Visibility

      Moderate or good, occasionally poor at first.

    Issued at 06:00 UTC on Wednesday 22nd Feb

  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

    06:00 UTC Wed 22nd Feb – 05:59 UTC Thu 23rd Feb

    • Wind

      Westerly 5 or 6, occasionally 7 at first, becoming cyclonic 5 to 7 later.
    • Sea State

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

      Rain or showers.
    • Visibility

      Moderate or good, occasionally poor.

    06:00 UTC Thu 23rd Feb – 05:59 UTC Fri 24th Feb

    • Wind

      Cyclonic 5 to 7, increasing gale 8 to storm 10, then becoming northwesterly 5 to 7, backing westerly 4 or 5 later.
    • Sea State

      Slight or moderate, occasionally rough, but very rough for a time in the North Channel.
    • Weather

      Rain or squally showers.
    • Visibility

      Moderate or good, occasionally poor at first.

    Issued at 06:00 UTC on Wednesday 22nd Feb

  15. Mull of Kintyre to Ardnamurchan Point * warning

    Mull of Kintyre to Ardnamurchan Point

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    Strong wind warning

    06:00 UTC Wed 22nd Feb – 05:59 UTC Thu 23rd Feb

    • Wind

      West 6 to gale 8, decreasing 4 or 5, then backing northeast 5 to 7 later.
    • Sea State

      Very rough, becoming moderate or rough.
    • Weather

      Showers, rain later.
    • Visibility

      Good, becoming moderate or poor later.

    06:00 UTC Thu 23rd Feb – 05:59 UTC Fri 24th Feb

    • Wind

      Northeast 5 to 7, occasionally gale 8 at first, backing northwest 5 to 7, then backing west 4 or 5 later.
    • Sea State

      Moderate or rough.
    • Weather

      Squally showers, rain at first.
    • Visibility

      Moderate or good.

    Issued at 06:00 UTC on Wednesday 22nd Feb

  16. The Minch * warning

    The Minch

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    Strong wind warning

    06:00 UTC Wed 22nd Feb – 05:59 UTC Thu 23rd Feb

    • Wind

      Westerly 7 to severe gale 9, becoming variable 3 or 4 later.
    • Sea State

      Moderate or rough, but very rough or high for a time in far south and in far north.
    • Weather

      Squally showers.
    • Visibility

      Moderate or good, occasionally poor at first.

    06:00 UTC Thu 23rd Feb – 05:59 UTC Fri 24th Feb

    • Wind

      Variable 3 or 4, becoming northwesterly 5 to 7, then backing westerly 4 or 5 later.
    • Sea State

      Slight or moderate, occasionally rough.
    • Weather

      Rain or showers.
    • Visibility

      Moderate or good.

    Issued at 06:00 UTC on Wednesday 22nd Feb

  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

    06:00 UTC Wed 22nd Feb – 05:59 UTC Thu 23rd Feb

    • Wind

      Westerly 7 to severe gale 9, occasionally storm 10 at first in far north, becoming variable 3 or 4 later.
    • Sea State

      High occasionally very high at first, becoming rough or very rough.
    • Weather

      Squally showers.
    • Visibility

      Moderate or good, occasionally poor at first.

    06:00 UTC Thu 23rd Feb – 05:59 UTC Fri 24th Feb

    • Wind

      Variable 3 or 4, becoming northwesterly 5 to 7, then backing westerly 4 or 5 later.
    • Sea State

      Rough, occasionally very rough.
    • Weather

      Rain or showers.
    • Visibility

      Moderate or good.

    Issued at 06:00 UTC on Wednesday 22nd Feb

  18. Shetland Isles * warning

    Shetland Isles

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    Strong wind warning

    06:00 UTC Wed 22nd Feb – 05:59 UTC Thu 23rd Feb

    • Wind

      Westerly gale 8 to storm 10, occasionally violent storm 11 at first in far south, veering northerly 6 to gale 8, then decreasing 3 or 4 later.
    • Sea State

      Moderate or rough in sheltered east, otherwise very rough or high, occasionally very high at first.
    • Weather

      Squally showers.
    • Visibility

      Moderate or good, occasionally poor.

    06:00 UTC Thu 23rd Feb – 05:59 UTC Fri 24th Feb

    • Wind

      --
    • Sea State

      --
    • Weather

      --
    • Visibility

      --

    Issued at 06:00 UTC on Wednesday 22nd Feb

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

    Gale Warnings in operation for Sea Area Fair Isle: VIOLENT STORM FORCE 11, VEERING NORTHERLY AND DECREASING SEVERE GALE FORCE 9 SOON. Issued 0345UTC, 22 February 2017.

    06:00 UTC Wed 22nd Feb – 17:59 UTC Wed 22nd Feb

    • Wind

      Westerly veering northwesterly, gale 8 to storm 10, occasionally violent storm 11 at first in far south.
    • Sea State

      High or very high, but rough or very rough east of Shetland.
    • Weather

      Squally showers.
    • Visibility

      Moderate or good, occasionally poor.

    18:00 UTC Wed 22nd Feb – 05:59 UTC Thu 23rd Feb

    • Wind

      Northwesterly 7 to severe gale 9, occasionally storm 10 at first in far south, veering northerly 6 to gale 8.
    • Sea State

      High occasionally very high at first in south, but rough or very rough east of Shetland.
    • Weather

      Squally showers.
    • Visibility

      Moderate or good, occasionally poor.

    Issued at 06:00 UTC on Wednesday 22nd Feb

  19. The Channel Islands * warning

    The Channel Islands

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    Strong wind warning

    06:00 UTC Wed 22nd Feb – 05:59 UTC Thu 23rd Feb

    • Wind

      West to southwest 5 to 6, locally 7 in the north.
    • Sea State

      Moderate to rather rough Jersey southwards, rather rough to rough Jersey northwards.
    • Weather

      Occasional mist and drizzle, with the risk of fog patches.
    • Visibility

      Moderate to good, occasionally poor, perhaps very poor.

    06:00 UTC Thu 23rd Feb – 05:59 UTC Fri 24th Feb

    • Wind

      Southwest 6 to 7, perhaps gale 8 with gusts to 50kt in the north mid-morning, veering west to northwest by midday, decreasing 5 to 6 overnight.
    • Sea State

      Rather rough to rough, increasing rough to very rough by late morning, decreasing rather rough to rough overnight.
    • Weather

      Occasional rain, drizzle, mist or fog patches clearing by late morning isolated showers developing by evening.
    • Visibility

      Moderate to very poor becoming moderate to good by afternoon.

    Issued at 06:00 UTC on Wednesday 22nd Feb

Great Ormes Head to the Mull of Galloway

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Strong wind warning

06:00 UTC Wed 22nd Feb – 05:59 UTC Thu 23rd Feb

  • Wind

    West or southwest 5 or 6, becoming variable 3 or 4, then becoming cyclonic 5 to 7 later.
  • Sea State

    Moderate or rough, becoming smooth or slight for a time.
  • Weather

    Rain or drizzle at times.
  • Visibility

    Moderate or good, occasionally poor.

06:00 UTC Thu 23rd Feb – 05:59 UTC Fri 24th Feb

  • Wind

    Cyclonic 5 to 7, increasing gale 8 to storm 10, then becoming northwest 5 to 7, backing west 4 or 5 later.
  • Sea State

    Moderate or rough, occasionally very rough.
  • Weather

    Squally showers, rain at first.
  • Visibility

    Moderate or good, occasionally poor at first.

Issued at 06:00 UTC on Wednesday 22nd Feb