Y Tywydd Dyfroedd Gyda'r Glannau

Gosodiadau
Iaith

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

Summary

A deep area of low pressure in the northern North Sea will move away eastwards. Another deep area of low pressure will move eastwards across Northern Ireland and then northern England on Thursday bringing gales severe gales across many parts, with storms across some parts.

* 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 Wed 22nd Feb – 11:59 UTC Thu 23rd Feb

    • Wind

      Northwest gale 8 to storm 10, decreasing 5 to 7, becoming variable 3 or 4 later, then becoming east 5 or 6.
    • Sea State

      Very rough or high, becoming rough or very rough, becoming moderate or rough later.
    • Weather

      Squally showers.
    • Visibility

      Moderate or good, occasionally poor.

    12:00 UTC Thu 23rd Feb – 11:59 UTC Fri 24th Feb

    • Wind

      East or northeast becoming cyclonic later, 4 or 5, increasing 6 at times,.
    • Sea State

      Moderate or rough.
    • Weather

      Rain or showers.
    • Visibility

      Moderate or good.

    Issued at 12:00 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

    12:00 UTC Wed 22nd Feb – 11:59 UTC Thu 23rd Feb

    • Wind

      West or northwest 7 or gale 8, occasionally severe gale 9 near Rattray Head, decreasing 5 or 6, becoming variable 3 or 4 later, then becoming northeast 5 to 7.
    • Sea State

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

      Showers.
    • Visibility

      Good.

    12:00 UTC Thu 23rd Feb – 11:59 UTC Fri 24th Feb

    • Wind

      Northeast 5 to 7, backing north 4 or 5, backing west 5 or 6 later.
    • Sea State

      Moderate, occasionally rough until later.
    • Weather

      Rain or showers.
    • Visibility

      Moderate or good.

    Issued at 12:00 UTC on Wednesday 22nd Feb

  3. Berwick on Tweed to Whitby * warning

    Berwick on Tweed to Whitby

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    Strong wind warning

    12:00 UTC Wed 22nd Feb – 11:59 UTC Thu 23rd Feb

    • Wind

      West 6 or 7, decreasing 4 or 5, backing southeast 3 or 4 later, then becoming cyclonic 7 to severe gale 9.
    • Sea State

      Rough or very rough.
    • Weather

      Rain later.
    • Visibility

      Good, becoming moderate or poor later.

    12:00 UTC Thu 23rd Feb – 11:59 UTC Fri 24th Feb

    • Wind

      Cyclonic becoming north 7 to severe gale 9, backing northwest 5 or 6.
    • Sea State

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

      Rain then showers.
    • Visibility

      Moderate or poor, becoming good.

    Issued at 12:00 UTC on Wednesday 22nd Feb

  4. Whitby to Gibraltar Point * warning

    Whitby to Gibraltar Point

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    Strong wind warning

    12:00 UTC Wed 22nd Feb – 11:59 UTC Thu 23rd Feb

    • Wind

      West 5 or 6, backing southwest 4 or 5, backing southeast 5 or 6 later, then veering southwest 6 to gale 8.
    • Sea State

      Slight or moderate, becoming moderate or rough.
    • Weather

      Rain later.
    • Visibility

      Good, becoming moderate or poor later.

    12:00 UTC Thu 23rd Feb – 11:59 UTC Fri 24th Feb

    • Wind

      Southwest 6 to gale 8, veering northwest gale 8 to storm 10, decreasing 6 or 7, decreasing 4 or 5 later.
    • Sea State

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

      Rain then showers.
    • Visibility

      Moderate or poor, becoming good.

    Issued at 12:00 UTC on Wednesday 22nd Feb

  5. Gibraltar Point to North Foreland * warning

    Gibraltar Point to North Foreland

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    Strong wind warning

    12:00 UTC Wed 22nd Feb – 11:59 UTC Thu 23rd Feb

    • Wind

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

      Moderate becoming rough later.
    • Weather

      Occasional rain.
    • Visibility

      Moderate or good, occasionally poor.

    12:00 UTC Thu 23rd Feb – 11:59 UTC Fri 24th Feb

    • Wind

      Southwesterly 6 to gale 8, veering westerly or northwesterly 7 to severe gale 9, occasionally storm 10 in north, decreasing 5 or 6, occasionally 4 later.
    • Sea State

      Rough, occasionally very rough for a time, becoming moderate later.
    • Weather

      Rain or showers.
    • Visibility

      Moderate or good, occasionally poor.

    Issued at 12:00 UTC on Wednesday 22nd Feb

  6. North Foreland to Selsey Bill * warning

    North Foreland to Selsey Bill

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    Strong wind warning

    12:00 UTC Wed 22nd Feb – 11:59 UTC Thu 23rd Feb

    • Wind

      Southwesterly 6 to gale 8, occasionally severe gale 9 later.
    • Sea State

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

      Occasional rain, showers later.
    • Visibility

      Moderate or good, occasionally poor until later.

    12:00 UTC Thu 23rd Feb – 11:59 UTC Fri 24th Feb

    • Wind

      Westerly or southwesterly 7 to severe gale 9, veering northwesterly 5 or 6, decreasing 3 or 4 later.
    • Sea State

      Rough or very rough, becoming moderate later.
    • Weather

      Showers.
    • Visibility

      Good.

    Issued at 12:00 UTC on Wednesday 22nd Feb

  7. Selsey Bill to Lyme Regis * warning

    Selsey Bill to Lyme Regis

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    Strong wind warning

    12:00 UTC Wed 22nd Feb – 11:59 UTC Thu 23rd Feb

    • Wind

      West or southwest 6 to gale 8, occasionally severe gale 9 for a time later.
    • Sea State

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

      Occasional rain, showers later.
    • Visibility

      Moderate or good, occasionally poor until later.

    12:00 UTC Thu 23rd Feb – 11:59 UTC Fri 24th Feb

    • Wind

      West 6 to gale 8, veering northwest 5 or 6, decreasing 3 or 4 later.
    • Sea State

      Rough or very rough, becoming moderate later.
    • Weather

      Showers.
    • Visibility

      Good.

    Issued at 12:00 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

    12:00 UTC Wed 22nd Feb – 11:59 UTC Thu 23rd Feb

    • Wind

      Southwest veering west later, 5 to 7 occasionally gale 8 later.
    • Sea State

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

      Occasional rain, showers later.
    • Visibility

      Moderate or good, occasionally poor until later.

    12:00 UTC Thu 23rd Feb – 11:59 UTC Fri 24th Feb

    • Wind

      West 6 to gale 8, veering northwest 6 or 7, decreasing 4 or 5 later.
    • Sea State

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

      Showers.
    • Visibility

      Good.

    Issued at 12:00 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

    12:00 UTC Wed 22nd Feb – 11:59 UTC Thu 23rd Feb

    • Wind

      Southwest 5 to 7, veering west or northwest 7 or gale 8, occasionally severe gale 9 later.
    • Sea State

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

      Occasional rain, showers later.
    • Visibility

      Moderate or good, occasionally poor until later.

    12:00 UTC Thu 23rd Feb – 11:59 UTC Fri 24th Feb

    • Wind

      Northwest 7 to severe gale 9, decreasing 5 or 6, occasionally 4 later.
    • Sea State

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

      Showers.
    • Visibility

      Good.

    Issued at 12:00 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

    12:00 UTC Wed 22nd Feb – 11:59 UTC Thu 23rd Feb

    • Wind

      Southwest becoming cyclonic 5 or 6, becoming southeast 6 to gale 8, veering northwest 7 to severe gale 9 later.
    • Sea State

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

      Occasional rain.
    • Visibility

      Moderate or good, occasionally poor.

    12:00 UTC Thu 23rd Feb – 11:59 UTC Fri 24th Feb

    • Wind

      Northwest 7 to severe gale 9, decreasing 5 or 6 later, then backing west 4 or 5.
    • Sea State

      Rough or very rough, becoming moderate later.
    • Weather

      Occasional rain, then showers, squally for a time.
    • Visibility

      Moderate or good, occasionally poor.

    Issued at 12:00 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

    12:00 UTC Wed 22nd Feb – 11:59 UTC Thu 23rd Feb

    • Wind

      West 5 or 6, becoming variable 3 or 4, becoming southeast 5 or 6, veering southwest 7 to severe gale 9 later, then veering northwest gale 8 to storm 10.
    • Sea State

      Slight or moderate, becoming moderate or rough.
    • Weather

      Occasional rain.
    • Visibility

      Moderate or good, occasionally poor.

    12:00 UTC Thu 23rd Feb – 11:59 UTC Fri 24th Feb

    • Wind

      Northwest gale 8 to storm 10, decreasing 6 or 7, backing west 4 or 5 later.
    • Sea State

      Moderate or rough, occasionally very rough for a time, becoming slight or moderate later.
    • Weather

      Occasional rain, then showers, squally for a time.
    • Visibility

      Moderate or good, occasionally poor.

    Issued at 12:00 UTC on Wednesday 22nd Feb

  12. Isle of Man * warning

    Isle of Man

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    Strong wind warning

    12:00 UTC Wed 22nd Feb – 11:59 UTC Thu 23rd Feb

    • Wind

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

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

      Fair then rain, showers later.
    • Visibility

      Good, occasionally moderate or poor.

    12:00 UTC Thu 23rd Feb – 11:59 UTC Fri 24th Feb

    • Wind

      West or northwest 7 or gale 8, decreasing 4 or 5 later.
    • Sea State

      Rough or very rough, becoming slight.
    • Weather

      Showers at first, then fair.
    • Visibility

      Good, occasionally moderate at first.

    Issued at 12:00 UTC on Wednesday 22nd Feb

  13. Lough Foyle to Carlingford Lough * warning

    Lough Foyle to Carlingford Lough

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    Strong wind warning

    12:00 UTC Wed 22nd Feb – 11:59 UTC Thu 23rd Feb

    • Wind

      West or northwest 5 or 6, becoming variable 3 or 4, becoming southeast 5 to 7 later, then becoming cyclonic 7 to severe gale 9, then becoming northwest 6 to gale 8.
    • Sea State

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

      Occasional rain.
    • Visibility

      Moderate or good, occasionally poor.

    12:00 UTC Thu 23rd Feb – 11:59 UTC Fri 24th Feb

    • Wind

      Northwest 6 to gale 8, backing southwest 4 or 5 later.
    • Sea State

      Moderate or rough, occasionally very rough until later in north.
    • Weather

      Occasional rain, then showers.
    • Visibility

      Moderate or good, occasionally poor for a time.

    Issued at 12:00 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

    12:00 UTC Wed 22nd Feb – 11:59 UTC Thu 23rd Feb

    • Wind

      Westerly or northwesterly 5 or 6, becoming variable 3 or 4, becoming southeasterly 5 to 7 later, then becoming cyclonic 7 to severe gale 9, then becoming northwesterly 6 to gale 8.
    • Sea State

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

      Occasional rain.
    • Visibility

      Moderate or good, occasionally poor.

    12:00 UTC Thu 23rd Feb – 11:59 UTC Fri 24th Feb

    • Wind

      Northwesterly 6 to gale 8, backing southwesterly 4 or 5 later.
    • Sea State

      Moderate or rough, occasionally very rough until later in north.
    • Weather

      Occasional rain, then showers.
    • Visibility

      Moderate or good, occasionally poor for a time.

    Issued at 12:00 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

    12:00 UTC Wed 22nd Feb – 11:59 UTC Thu 23rd Feb

    • Wind

      Northwest 6 or 7, decreasing 4 or 5, becoming variable 3 or 4, becoming northeast 6 to gale 8 later, then backing northwest 5 or 6.
    • Sea State

      Rough or very rough.
    • Weather

      Occasional rain.
    • Visibility

      Moderate or good, occasionally poor.

    12:00 UTC Thu 23rd Feb – 11:59 UTC Fri 24th Feb

    • Wind

      Northwest 5 or 6, increasing 7 or gale 8, decreasing 5 or 6 later, then backing southwest 4 or 5.
    • Sea State

      Rough or very rough.
    • Weather

      Occasional rain, then showers.
    • Visibility

      Moderate or good, occasionally poor for a time.

    Issued at 12:00 UTC on Wednesday 22nd Feb

  16. The Minch * warning

    The Minch

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    Strong wind warning

    12:00 UTC Wed 22nd Feb – 11:59 UTC Thu 23rd Feb

    • Wind

      Northwest 6 to gale 8, decreasing 4 or 5, then becoming variable 3 or 4, becoming cyclonic 4 or 5 later.
    • Sea State

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

      Occasional rain.
    • Visibility

      Moderate or good, occasionally poor.

    12:00 UTC Thu 23rd Feb – 11:59 UTC Fri 24th Feb

    • Wind

      Cyclonic 4 or 5, becoming northwest 6 to gale 8, backing west 4 or 5 later, then backing southwest 5 or 6.
    • Sea State

      Moderate or rough.
    • Weather

      Occasional rain, then showers.
    • Visibility

      Moderate or good, occasionally poor for a time.

    Issued at 12:00 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

    12:00 UTC Wed 22nd Feb – 11:59 UTC Thu 23rd Feb

    • Wind

      Northwest 6 to gale 8, decreasing 4 or 5, then becoming variable 3 or 4, becoming cyclonic 4 or 5 later.
    • Sea State

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

      Occasional rain.
    • Visibility

      Moderate or good, occasionally poor.

    12:00 UTC Thu 23rd Feb – 11:59 UTC Fri 24th Feb

    • Wind

      Cyclonic 4 or 5, becoming northwest 6 to gale 8, backing west 4 or 5 later, then backing southwest 5 or 6.
    • Sea State

      Rough or very rough.
    • Weather

      Occasional rain, then showers.
    • Visibility

      Moderate or good, occasionally poor for a time.

    Issued at 12:00 UTC on Wednesday 22nd Feb

  18. Shetland Isles * warning

    Shetland Isles

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    Strong wind warning

    12:00 UTC Wed 22nd Feb – 11:59 UTC Thu 23rd Feb

    • Wind

      Northwest 7 to severe gale 9, veering north 6 to gale 8, veering northeast 4 or 5 later.
    • Sea State

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

      Showers, squally until later.
    • Visibility

      Moderate or good, occasionally poor.

    12:00 UTC Thu 23rd Feb – 11:59 UTC Fri 24th Feb

    • Wind

      --
    • Sea State

      --
    • Weather

      --
    • Visibility

      --

    Issued at 12:00 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.

    12:00 UTC Wed 22nd Feb – 23:59 UTC Wed 22nd Feb

    • Wind

      Northwesterly 7 to severe gale 9, veering northerly 6 to gale 8
    • Sea State

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

      Squally showers.
    • Visibility

      Moderate or good, occasionally poor.

    00:00 UTC Thu 23rd Feb – 11:59 UTC Thu 23rd Feb

    • Wind

      Northerly 6 to gale 8, veering northeasterly 4 or 5 later, occasionally 6 in north
    • Sea State

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

      Showers, squally for a time.
    • Visibility

      Moderate or good, occasionally poor for a time.

    Issued at 12:00 UTC on Wednesday 22nd Feb

  19. The Channel Islands * warning

    The Channel Islands

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    Strong wind warning

    12:00 UTC Wed 22nd Feb – 11:59 UTC Thu 23rd Feb

    • Wind

      Southwest 5 to 6, locally 7 in the north, increasing 6 to gale 8 Thursday morning, with gusts to 50kt, veering west to northwest later.
    • Sea State

      Moderate to rather rough jersey southwards, rather rough to rough jersey northwards, becoming rough to very rough Thursday morning.
    • Weather

      Occasional rain or drizzle and mist patches, clearing later.
    • Visibility

      Moderate to good, occasionally poor.

    12:00 UTC Thu 23rd Feb – 11:59 UTC Fri 24th Feb

    • Wind

      Northwest 6 to 7, occasionally gale 8 with gusts to 50kt in the north at first, decreasing 5 to 6 overnight, then 4 to 5 Friday morning.
    • Sea State

      Rough to very rough, decreasing rather rough to rough overnight, then moderate later.
    • Weather

      Isolated showers developing by evening.
    • Visibility

      Moderate to good.

    Issued at 12:00 UTC on Wednesday 22nd Feb

Lyme Regis to Lands End including the Isles of Scilly

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Strong wind warning

12:00 UTC Wed 22nd Feb – 11:59 UTC Thu 23rd Feb

  • Wind

    Southwest veering west later, 5 to 7 occasionally gale 8 later.
  • Sea State

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

    Occasional rain, showers later.
  • Visibility

    Moderate or good, occasionally poor until later.

12:00 UTC Thu 23rd Feb – 11:59 UTC Fri 24th Feb

  • Wind

    West 6 to gale 8, veering northwest 6 or 7, decreasing 4 or 5 later.
  • Sea State

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

    Showers.
  • Visibility

    Good.

Issued at 12:00 UTC on Wednesday 22nd Feb