Y Tywydd Dyfroedd Gyda'r Glannau

Gosodiadau
Iaith

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

Summary

The British Isles will lie in a west to northwesterly airflow during Saturday night but a ridge of high pressure will encroach from the west during Sunday.

* Wind or gale warning issued

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

    From Cape Wrath to Rattray Head including Orkney

    Go to top of page

    Strong wind warning

    00:00 UTC Sun 11th Dec – 23:59 UTC Sun 11th Dec

    • Wind

      Westerly or southwesterly 5 to 7, occasionally gale 8 in north, then decreasing 3 or 4 later.
    • Sea State

      Rough or very rough until later to the west and north of Orkney, otherwise slight or moderate.
    • Weather

      Showers, becoming fair later.
    • Visibility

      Good, occasionally moderate in north.

    00:00 UTC Mon 12th Dec – 23:59 UTC Mon 12th Dec

    • Wind

      South or southwest 3 increasing 4 or 5, occasionally 6 near Cape Wrath, then becoming variable 3 or 4 later.
    • Sea State

      Moderate or rough to the west and north of Orkney, otherwise slight or moderate.
    • Weather

      Rain later.
    • Visibility

      Good, occasionally moderate later.

    Issued at 00:00 UTC on Sunday 11th Dec

  2. Rattray Head to Berwick on Tweed * warning

    Rattray Head to Berwick on Tweed

    Go to top of page

    Strong wind warning

    00:00 UTC Sun 11th Dec – 23:59 UTC Sun 11th Dec

    • Wind

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

      Slight or moderate.
    • Weather

      Fair.
    • Visibility

      Good.

    00:00 UTC Mon 12th Dec – 23:59 UTC Mon 12th Dec

    • Wind

      Westerly or southwesterly 4 or 5, occasionally 6 in north, becoming variable 3 at times in south.
    • Sea State

      Slight or moderate in north, slight in south.
    • Weather

      Rain later.
    • Visibility

      Good, occasionally moderate later.

    Issued at 00:00 UTC on Sunday 11th Dec

  3. Berwick on Tweed to Whitby * warning

    Berwick on Tweed to Whitby

    Go to top of page

    Strong wind warning

    00:00 UTC Sun 11th Dec – 23:59 UTC Sun 11th Dec

    • Wind

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

      Slight, occasionally moderate at first.
    • Weather

      Fair.
    • Visibility

      Good.

    00:00 UTC Mon 12th Dec – 23:59 UTC Mon 12th Dec

    • Wind

      West backing south 3 or 4, occasionally 5 later.
    • Sea State

      Slight, becoming slight or moderate later.
    • Weather

      Rain later.
    • Visibility

      Good, occasionally moderate later.

    Issued at 00:00 UTC on Sunday 11th Dec

  4. Whitby to Gibraltar Point * warning

    Whitby to Gibraltar Point

    Go to top of page

    Strong wind warning

    00:00 UTC Sun 11th Dec – 23:59 UTC Sun 11th Dec

    • Wind

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

      Slight or moderate.
    • Weather

      Fair.
    • Visibility

      Good.

    00:00 UTC Mon 12th Dec – 23:59 UTC Mon 12th Dec

    • Wind

      West backing south 3 or 4, occasionally 5 later.
    • Sea State

      Slight, occasionally moderate later.
    • Weather

      Rain later.
    • Visibility

      Good, occasionally moderate later.

    Issued at 00:00 UTC on Sunday 11th Dec

  5. Gibraltar Point to North Foreland * warning

    Gibraltar Point to North Foreland

    Go to top of page

    Strong wind warning

    00:00 UTC Sun 11th Dec – 23:59 UTC Sun 11th Dec

    • Wind

      Northwesterly backing westerly 4 or 5, occasionally 6 at first.
    • Sea State

      Slight or moderate.
    • Weather

      Rain then fair.
    • Visibility

      Moderate, occasionally poor, becoming good.

    00:00 UTC Mon 12th Dec – 23:59 UTC Mon 12th Dec

    • Wind

      Westerly backing southerly 3 or 4, occasionally 5 later.
    • Sea State

      Slight, occasionally moderate later.
    • Weather

      Rain later.
    • Visibility

      Good, occasionally moderate later.

    Issued at 00:00 UTC on Sunday 11th Dec

  6. North Foreland to Selsey Bill * warning

    North Foreland to Selsey Bill

    Go to top of page

    Strong wind warning

    00:00 UTC Sun 11th Dec – 23:59 UTC Sun 11th Dec

    • Wind

      Northwesterly backing westerly 4 or 5, occasionally 6 at first in east, then decreasing 3 except in far east.
    • Sea State

      Moderate becoming slight.
    • Weather

      Rain at first in far east, otherwise fair.
    • Visibility

      Good, occasionally moderate at first in far east.

    00:00 UTC Mon 12th Dec – 23:59 UTC Mon 12th Dec

    • Wind

      Westerly becoming variable 3 or less, then becoming southerly 4 or 5.
    • Sea State

      Slight, occasionally moderate later.
    • Weather

      Rain later.
    • Visibility

      Good, occasionally poor later.

    Issued at 00:00 UTC on Sunday 11th Dec

  7. Selsey Bill to Lyme Regis

    Selsey Bill to Lyme Regis

    Go to top of page

    00:00 UTC Sun 11th Dec – 23:59 UTC Sun 11th Dec

    • Wind

      Northwest 3 or 4, becoming variable 3 or less later.
    • Sea State

      Slight, occasionally moderate at first.
    • Weather

      Fair.
    • Visibility

      Moderate or good.

    00:00 UTC Mon 12th Dec – 23:59 UTC Mon 12th Dec

    • Wind

      Variable 3 or 4 becoming south or southeast 4 or 5, then veering southwest 3 or 4 for a time later.
    • Sea State

      Slight or moderate.
    • Weather

      Fair then rain or drizzle at times.
    • Visibility

      Moderate or good, occasionally poor.

    Issued at 00:00 UTC on Sunday 11th Dec

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

    Lyme Regis to Lands End including the Isles of Scilly

    Go to top of page

    Strong wind warning

    00:00 UTC Sun 11th Dec – 23:59 UTC Sun 11th Dec

    • Wind

      Northwesterly 3 or 4 becoming variable 2, then becoming southeasterly 4 or 5 later, occasionally 6 later in west.
    • Sea State

      Slight or moderate in east, rough becoming moderate in west.
    • Weather

      Rain later in west.
    • Visibility

      Moderate or good, becoming poor later in west.

    00:00 UTC Mon 12th Dec – 23:59 UTC Mon 12th Dec

    • Wind

      Southeast veering southwest 4 or 5, occasionally 6 at first, then backing south 3 or 4 later.
    • Sea State

      Slight or moderate in east, mainly moderate in west, but becoming rough near the Isles of Scilly.
    • Weather

      Rain or drizzle at times, fog patches developing.
    • Visibility

      Moderate or good, occasionally very poor.

    Issued at 00:00 UTC on Sunday 11th Dec

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

    Lands End to St Davids Head including the Bristol Channel

    Go to top of page

    00:00 UTC Sun 11th Dec – 23:59 UTC Sun 11th Dec

    • Wind

      West or northwest 3 or 4 becoming variable 3 or less, then becoming southeast 4 or 5 later.
    • Sea State

      Slight or moderate.
    • Weather

      Mainly fair.
    • Visibility

      Moderate or good.

    00:00 UTC Mon 12th Dec – 23:59 UTC Mon 12th Dec

    • Wind

      Southeast veering southwest 4 or 5, occasionally 6 at first, then backing south 3 or 4 later.
    • Sea State

      Slight or moderate.
    • Weather

      Fair then rain or drizzle at times, fog patches developing.
    • Visibility

      Moderate or good, occasionally very poor.

    Issued at 00:00 UTC on Sunday 11th Dec

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

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

    Go to top of page

    00:00 UTC Sun 11th Dec – 23:59 UTC Sun 11th Dec

    • Wind

      Westerly 3 or 4, occasionally 5 at first in north, then backing southerly later.
    • Sea State

      Slight or moderate.
    • Weather

      Fair.
    • Visibility

      Good.

    00:00 UTC Mon 12th Dec – 23:59 UTC Mon 12th Dec

    • Wind

      South or southeast 4 or 5, occasionally 3 at first, then increasing 6 at times.
    • Sea State

      Slight or moderate.
    • Weather

      Fair then rain or drizzle at times.
    • Visibility

      Good, occasionally poor later.

    Issued at 00:00 UTC on Sunday 11th Dec

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

    Great Ormes Head to the Mull of Galloway

    Go to top of page

    Strong wind warning

    00:00 UTC Sun 11th Dec – 23:59 UTC Sun 11th Dec

    • Wind

      Westerly 4 or 5, occasionally 6 at first in north, then backing southwesterly 3 or 4 later.
    • Sea State

      Slight or moderate.
    • Weather

      Fair.
    • Visibility

      Good.

    00:00 UTC Mon 12th Dec – 23:59 UTC Mon 12th Dec

    • Wind

      South or southwest 3 or 4 backing southeast 5 or 6, then becoming variable 3 or 4 later.
    • Sea State

      Slight or moderate.
    • Weather

      Rain or drizzle later.
    • Visibility

      Good, occasionally poor later.

    Issued at 00:00 UTC on Sunday 11th Dec

  12. Isle of Man * warning

    Isle of Man

    Go to top of page

    Strong wind warning

    00:00 UTC Sun 11th Dec – 23:59 UTC Sun 11th Dec

    • Wind

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

      Slight or moderate, becoming slight later.
    • Weather

      Fair.
    • Visibility

      Good.

    00:00 UTC Mon 12th Dec – 23:59 UTC Mon 12th Dec

    • Wind

      Southwesterly 3 or 4 backing southerly or southeasterly 4 or 5, occasionally 6 in north, then becoming variable 3 or 4 later.
    • Sea State

      Slight, becoming slight or moderate.
    • Weather

      Fair then rain or drizzle.
    • Visibility

      Good, becoming moderate or poor.

    Issued at 00:00 UTC on Sunday 11th Dec

  13. Lough Foyle to Carlingford Lough * warning

    Lough Foyle to Carlingford Lough

    Go to top of page

    Strong wind warning

    00:00 UTC Sun 11th Dec – 23:59 UTC Sun 11th Dec

    • Wind

      West or southwest 4 or 5, occasionally 6 at first, decreasing 3 at times later.
    • Sea State

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

      Showers then fair.
    • Visibility

      Good.

    00:00 UTC Mon 12th Dec – 23:59 UTC Mon 12th Dec

    • Wind

      Southwest backing south, then becoming cyclonic later, 4 or 5, decreasing 3 at times.
    • Sea State

      Slight or moderate.
    • Weather

      Fair then rain or drizzle.
    • Visibility

      Good, occasionally poor.

    Issued at 00:00 UTC on Sunday 11th 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

    Go to top of page

    Strong wind warning

    00:00 UTC Sun 11th Dec – 23:59 UTC Sun 11th Dec

    • Wind

      West backing southwest 4 or 5, occasionally 6 at first, decreasing 3 at times later.
    • Sea State

      Slight or moderate.
    • Weather

      Showers then fair.
    • Visibility

      Good.

    00:00 UTC Mon 12th Dec – 23:59 UTC Mon 12th Dec

    • Wind

      South or southwest backing southeast, 4 or 5, decreasing 3 at times.
    • Sea State

      Slight, occasionally moderate.
    • Weather

      Fair then rain or drizzle.
    • Visibility

      Good, occasionally poor.

    Issued at 00:00 UTC on Sunday 11th Dec

  15. Mull of Kintyre to Ardnamurchan Point * warning

    Mull of Kintyre to Ardnamurchan Point

    Go to top of page

    Strong wind warning

    00:00 UTC Sun 11th Dec – 23:59 UTC Sun 11th Dec

    • Wind

      West 5 or 6, backing southwest 4 or 5 later.
    • Sea State

      Slight in shelter in south, otherwise moderate or rough.
    • Weather

      Showers then fair.
    • Visibility

      Good.

    00:00 UTC Mon 12th Dec – 23:59 UTC Mon 12th Dec

    • Wind

      Southwest 4 or 5 backing south 5 or 6, then backing southeast 3 or 4 later.
    • Sea State

      Slight in shelter in south, otherwise moderate or rough.
    • Weather

      Fair then rain or drizzle.
    • Visibility

      Good, occasionally poor.

    Issued at 00:00 UTC on Sunday 11th Dec

  16. The Minch * warning

    The Minch

    Go to top of page

    Strong wind warning

    00:00 UTC Sun 11th Dec – 23:59 UTC Sun 11th Dec

    • Wind

      West 5 to 7 backing southwest 4 or 5.
    • Sea State

      Moderate or rough becoming slight or moderate.
    • Weather

      Showers, becoming fair later.
    • Visibility

      Good.

    00:00 UTC Mon 12th Dec – 23:59 UTC Mon 12th Dec

    • Wind

      South or southwest 4 or 5 increasing 6 or 7, then veering north or northeast 4 or 5 later.
    • Sea State

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

      Fair then rain.
    • Visibility

      Moderate or good, occasionally poor.

    Issued at 00:00 UTC on Sunday 11th Dec

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

    Ardnamurchan Point to Cape Wrath including the Outer Hebrides

    Go to top of page

    Strong wind warning

    00:00 UTC Sun 11th Dec – 23:59 UTC Sun 11th Dec

    • Wind

      Westerly 5 to 7, occasionally gale 8 at first in far north, then backing southwesterly 4 or 5.
    • Sea State

      Rough or very rough becoming moderate or rough.
    • Weather

      Showers, becoming fair later.
    • Visibility

      Good, occasionally moderate at first.

    00:00 UTC Mon 12th Dec – 23:59 UTC Mon 12th Dec

    • Wind

      South or southwest 4 or 5 increasing 6 or 7, then veering north or northeast 4 or 5 later.
    • Sea State

      Moderate or rough, becoming very rough for a time to the west of the Outer Hebrides.
    • Weather

      Fair then rain.
    • Visibility

      Moderate or good, occasionally poor.

    Issued at 00:00 UTC on Sunday 11th Dec

  18. Shetland Isles * warning

    Shetland Isles

    Go to top of page

    Strong wind warning

    00:00 UTC Sun 11th Dec – 23:59 UTC Sun 11th Dec

    • Wind

      Southwesterly veering westerly 5 or 6, occasionally 7 at first in south, veering northerly 3 or 4, then becoming variable later.
    • Sea State

      Moderate or rough in east, very rough becoming rough in west.
    • Weather

      Rain or showers, becoming fair later.
    • Visibility

      Moderate or good.

    00:00 UTC Mon 12th Dec – 23:59 UTC Mon 12th Dec

    • Wind

      --
    • Sea State

      --
    • Weather

      --
    • Visibility

      --

    Issued at 00:00 UTC on Sunday 11th Dec

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

    Gale Warnings in operation for Sea Area Fair Isle: Westerly gale force 8 expected soon, issued at 1546 on Saturday 10 December.

    00:00 UTC Sun 11th Dec – 11:59 UTC Sun 11th Dec

    • Wind

      Southwesterly veering westerly 5 or 6, occasionally 7 in south, then veering northerly or northeasterly 3 or 4.
    • Sea State

      Rough or very rough in west, moderate or rough in east.
    • Weather

      Rain or showers.
    • Visibility

      Moderate or good.

    12:00 UTC Sun 11th Dec – 23:59 UTC Sun 11th Dec

    • Wind

      Northerly or northeasterly 3 or 4, occasionally 5 at first in northeast, then becoming variable.
    • Sea State

      Moderate or rough in east, mainly rough in west, but very rough at first in far west.
    • Weather

      Showers then fair.
    • Visibility

      Moderate at first in far west, otherwise good.

    Issued at 00:00 UTC on Sunday 11th Dec

  19. The Channel Islands * warning

    The Channel Islands

    Go to top of page

    Strong wind warning

    00:00 UTC Sun 11th Dec – 23:59 UTC Sun 11th Dec

    • Wind

      Northwest 3 or 4, perhaps locally 5, veering north overnight, further veering southeast 2 or 3 around midday, then increasing 4 or 5 during the evening, perhaps locally 6.
    • Sea State

      Slight or moderate, decreasing slight by morning, locally moderate again late evening.
    • Weather

      Rain and drizzle in the southeast of the area at first, risk of mist or fog patches drifting from French coasts late morning, then further rain and drizzle spreading from the southwest in the evening.
    • Visibility

      Good, occasionally moderate to very poor.

    00:00 UTC Mon 12th Dec – 23:59 UTC Mon 12th Dec

    • Wind

      Southeast 4 or 5, perhaps locally 6, veering south by morning, then veering south or southwest 3 or 4 by midday.
    • Sea State

      Slight or moderate, perhaps locally rather rough, decreasing slight by evening, with a low swell.
    • Weather

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

      Moderate or poor, perhaps very poor.

    Issued at 00:00 UTC on Sunday 11th Dec