Y Tywydd Dyfroedd Gyda'r Glannau

Gosodiadau
Iaith

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

Summary

Heavy, squally showers and thunderstorms will spread northwards across the British Isles during tonight and Saturday. Fresher and mostly dry conditions will gradually follow from the southwest to all parts, although there will be further scattered thundery showers for many on Sunday.

* 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

    23:00 UTC Fri 3rd Jul – 22:59 UTC Sat 4th Jul

    • Wind

      East or southeast 5 or 6, occasionally 7 near Sutherland, becoming variable 3 or 4 later.
    • Sea State

      Slight or moderate.
    • Weather

      Squally thundery showers for a time, fog patches.
    • Visibility

      Moderate or good, occasionally very poor.

    23:00 UTC Sat 4th Jul – 22:59 UTC Sun 5th Jul

    • Wind

      Variable 3 or 4, becoming east or southeast 4 or 5 for a time.
    • Sea State

      Slight, occasionally moderate at first.
    • Weather

      Fog patches at first, thundery showers later.
    • Visibility

      Moderate or good, occasionally very poor at first.

    Issued at 23:00 UTC on Friday 3rd Jul

  2. Rattray Head to Berwick on Tweed * warning

    Rattray Head to Berwick on Tweed

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    Strong wind warning

    23:00 UTC Fri 3rd Jul – 22:59 UTC Sat 4th Jul

    • Wind

      East or southeast 4 or 5, increasing 6 at times, becoming variable mainly southwest 3 or 4 later.
    • Sea State

      Slight becoming moderate.
    • Weather

      Squally thundery showers for a time, fog patches.
    • Visibility

      Moderate or good, occasionally very poor.

    23:00 UTC Sat 4th Jul – 22:59 UTC Sun 5th Jul

    • Wind

      Southwest, backing southeast for a time, 3 or 4, occasionally 5 later.
    • Sea State

      Moderate becoming slight.
    • Weather

      Fog patches at first, thundery showers later.
    • Visibility

      Moderate or good, occasionally very poor at first.

    Issued at 23:00 UTC on Friday 3rd Jul

  3. Berwick on Tweed to Whitby * warning

    Berwick on Tweed to Whitby

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    Strong wind warning

    23:00 UTC Fri 3rd Jul – 22:59 UTC Sat 4th Jul

    • Wind

      East or southeast 4 or 5, occasionally 6 at first, then veering southwest later.
    • Sea State

      Slight, becoming moderate for a time.
    • Weather

      Squally thundery showers for a time, fog patches.
    • Visibility

      Moderate or good, occasionally very poor.

    23:00 UTC Sat 4th Jul – 22:59 UTC Sun 5th Jul

    • Wind

      Southwest, backing southeast for a time, 3 or 4, occasionally 5 later.
    • Sea State

      Slight.
    • Weather

      Thundery showers later.
    • Visibility

      Good.

    Issued at 23:00 UTC on Friday 3rd Jul

  4. Whitby to Gibraltar Point * warning

    Whitby to Gibraltar Point

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    Strong wind warning

    23:00 UTC Fri 3rd Jul – 22:59 UTC Sat 4th Jul

    • Wind

      East 4 or 5, increasing 6 or 7 for a time, then veering west or southwest 3 or 4.
    • Sea State

      Slight, becoming moderate for a time.
    • Weather

      Thundery showers and fog patches then fair.
    • Visibility

      Moderate or good, occasionally very poor at first.

    23:00 UTC Sat 4th Jul – 22:59 UTC Sun 5th Jul

    • Wind

      West becoming variable 3 or 4.
    • Sea State

      Slight.
    • Weather

      Thundery showers.
    • Visibility

      Good, occasionally moderate.

    Issued at 23:00 UTC on Friday 3rd Jul

  5. Gibraltar Point to North Foreland * warning

    Gibraltar Point to North Foreland

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    Strong wind warning

    23:00 UTC Fri 3rd Jul – 22:59 UTC Sat 4th Jul

    • Wind

      Easterly 5 to 7 veering southerly or southwesterly 4 or 5, occasionally 3 later.
    • Sea State

      Slight or moderate, becoming slight.
    • Weather

      Thundery showers and fog patches then fair.
    • Visibility

      Moderate or good, occasionally very poor at first.

    23:00 UTC Sat 4th Jul – 22:59 UTC Sun 5th Jul

    • Wind

      Southwesterly becoming variable 3 or 4, then becoming southwesterly 4 or 5 later.
    • Sea State

      Slight.
    • Weather

      Thundery showers.
    • Visibility

      Good, occasionally poor.

    Issued at 23:00 UTC on Friday 3rd Jul

  6. North Foreland to Selsey Bill * warning

    North Foreland to Selsey Bill

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    Strong wind warning

    23:00 UTC Fri 3rd Jul – 22:59 UTC Sat 4th Jul

    • Wind

      Easterly or northeasterly 5 to 7 veering southwesterly 4 or 5, occasionally 6 in east, decreasing 3 later.
    • Sea State

      Slight or moderate.
    • Weather

      Thundery showers then fair.
    • Visibility

      Moderate or good, occasionally poor at first.

    23:00 UTC Sat 4th Jul – 22:59 UTC Sun 5th Jul

    • Wind

      Variable mainly southwesterly 2 or 3, increasing 4 or 5 later.
    • Sea State

      Slight, becoming slight or moderate later.
    • Weather

      Thundery showers.
    • Visibility

      Good, occasionally poor.

    Issued at 23:00 UTC on Friday 3rd Jul

  7. Selsey Bill to Lyme Regis * warning

    Selsey Bill to Lyme Regis

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    Strong wind warning

    23:00 UTC Fri 3rd Jul – 22:59 UTC Sat 4th Jul

    • Wind

      East veering southwest 4 or 5, occasionally 6 at first, decreasing 2 or 3 later.
    • Sea State

      Moderate, becoming slight or moderate.
    • Weather

      Thundery showers then fair.
    • Visibility

      Moderate or good, occasionally poor at first.

    23:00 UTC Sat 4th Jul – 22:59 UTC Sun 5th Jul

    • Wind

      West or southwest 2 or 3, increasing 4 or 5 later.
    • Sea State

      Slight, occasionally moderate.
    • Weather

      Mainly fair.
    • Visibility

      Moderate or good.

    Issued at 23:00 UTC on Friday 3rd Jul

  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

    23:00 UTC Fri 3rd Jul – 22:59 UTC Sat 4th Jul

    • Wind

      Southeasterly at first in east, otherwise southwesterly, 4 or 5, occasionally 6 at first, decreasing 3 at times later.
    • Sea State

      Slight or moderate, becoming rough for a time at first near the Isles of Scilly.
    • Weather

      Thundery showers then fair.
    • Visibility

      Moderate or good, occasionally poor at first.

    23:00 UTC Sat 4th Jul – 22:59 UTC Sun 5th Jul

    • Wind

      South or southwest 4 or 5.
    • Sea State

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

      Showers.
    • Visibility

      Good.

    Issued at 23:00 UTC on Friday 3rd Jul

  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

    23:00 UTC Fri 3rd Jul – 22:59 UTC Sat 4th Jul

    • Wind

      East or southeast veering south or southwest, 4 or 5, occasionally 6 at first.
    • Sea State

      Slight or moderate.
    • Weather

      Thundery showers then fair.
    • Visibility

      Moderate or good, occasionally poor at first.

    23:00 UTC Sat 4th Jul – 22:59 UTC Sun 5th Jul

    • Wind

      South veering southwest 4 or 5, increasing 6 at times.
    • Sea State

      Moderate in west, slight or moderate in east.
    • Weather

      Thundery showers.
    • Visibility

      Good.

    Issued at 23:00 UTC on Friday 3rd Jul

  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

    23:00 UTC Fri 3rd Jul – 22:59 UTC Sat 4th Jul

    • Wind

      Easterly 5 to 7 veering southerly or southwesterly 4 or 5, occasionally 6 in north.
    • Sea State

      Slight or moderate.
    • Weather

      Squally thundery showers then fair.
    • Visibility

      Moderate or good, occasionally poor at first.

    23:00 UTC Sat 4th Jul – 22:59 UTC Sun 5th Jul

    • Wind

      Southerly or southwesterly 4 or 5, occasionally 6 in north.
    • Sea State

      Slight or moderate.
    • Weather

      Thundery showers.
    • Visibility

      Good.

    Issued at 23:00 UTC on Friday 3rd Jul

  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

    23:00 UTC Fri 3rd Jul – 22:59 UTC Sat 4th Jul

    • Wind

      East 5 to 7 veering south or southwest 4 or 5, increasing 6 at times.
    • Sea State

      Slight or moderate.
    • Weather

      Squally thundery showers then fair.
    • Visibility

      Moderate or good, occasionally poor at first.

    23:00 UTC Sat 4th Jul – 22:59 UTC Sun 5th Jul

    • Wind

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

      Slight or moderate.
    • Weather

      Thundery showers.
    • Visibility

      Good.

    Issued at 23:00 UTC on Friday 3rd Jul

  12. Isle of Man * warning

    Isle of Man

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    Strong wind warning

    23:00 UTC Fri 3rd Jul – 22:59 UTC Sat 4th Jul

    • Wind

      East 5 to 7 veering south or southwest 4 or 5, increasing 6 at times.
    • Sea State

      Slight or moderate.
    • Weather

      Rain or squally thundery showers then mainly fair.
    • Visibility

      Good, occasionally poor at first.

    23:00 UTC Sat 4th Jul – 22:59 UTC Sun 5th Jul

    • Wind

      South veering southwest 4 or 5, occasionally 6 later.
    • Sea State

      Slight or moderate.
    • Weather

      Showers.
    • Visibility

      Good, occasionally moderate.

    Issued at 23:00 UTC on Friday 3rd Jul

  13. Lough Foyle to Carlingford Lough * warning

    Lough Foyle to Carlingford Lough

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    Strong wind warning

    23:00 UTC Fri 3rd Jul – 22:59 UTC Sat 4th Jul

    • Wind

      Easterly or southeasterly 5 to 7, veering southerly or southwesterly 4 or 5 later, occasionally variable 3 later in north.
    • Sea State

      Slight or moderate.
    • Weather

      Squally thundery showers then fair.
    • Visibility

      Moderate or good, occasionally poor at first.

    23:00 UTC Sat 4th Jul – 22:59 UTC Sun 5th Jul

    • Wind

      Southerly 4 or 5, occasionally variable 3 in north.
    • Sea State

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

      Thundery showers.
    • Visibility

      Good.

    Issued at 23:00 UTC on Friday 3rd Jul

  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

    23:00 UTC Fri 3rd Jul – 22:59 UTC Sat 4th Jul

    • Wind

      East or southeast 5 to 7 becoming variable 3 or 4, then south 4 or 5 later.
    • Sea State

      Slight or moderate.
    • Weather

      Squally thundery showers then fair.
    • Visibility

      Moderate or good, occasionally poor at first.

    23:00 UTC Sat 4th Jul – 22:59 UTC Sun 5th Jul

    • Wind

      South 3 or 4, increasing 5 at times.
    • Sea State

      Slight, occasionally moderate except in Firth of Clyde.
    • Weather

      Thundery showers.
    • Visibility

      Good.

    Issued at 23:00 UTC on Friday 3rd Jul

  15. Mull of Kintyre to Ardnamurchan Point * warning

    Mull of Kintyre to Ardnamurchan Point

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    Strong wind warning

    23:00 UTC Fri 3rd Jul – 22:59 UTC Sat 4th Jul

    • Wind

      East or southeast 5 to 7, becoming variable 3 or 4 later.
    • Sea State

      Slight or moderate, becoming slight later.
    • Weather

      Squally thundery showers for a time.
    • Visibility

      Good, occasionally poor.

    23:00 UTC Sat 4th Jul – 22:59 UTC Sun 5th Jul

    • Wind

      Variable 3 or 4, becoming southeast 4 or 5 for a time.
    • Sea State

      Slight, occasionally moderate near Islay and Tiree.
    • Weather

      Thundery showers.
    • Visibility

      Good.

    Issued at 23:00 UTC on Friday 3rd Jul

  16. The Minch * warning

    The Minch

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    Strong wind warning

    23:00 UTC Fri 3rd Jul – 22:59 UTC Sat 4th Jul

    • Wind

      East 5 to 7, occasionally 4 at first, veering south 4 or 5 later.
    • Sea State

      Slight, becoming slight or moderate.
    • Weather

      Squally thundery showers for a time.
    • Visibility

      Good, occasionally poor.

    23:00 UTC Sat 4th Jul – 22:59 UTC Sun 5th Jul

    • Wind

      South 3 or 4, occasionally 5 at first, then becoming variable 2 for a time.
    • Sea State

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

      Thundery showers.
    • Visibility

      Moderate or good.

    Issued at 23:00 UTC on Friday 3rd Jul

  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

    23:00 UTC Fri 3rd Jul – 22:59 UTC Sat 4th Jul

    • Wind

      East 5 to 7, occasionally 4 at first, veering south 4 or 5 later.
    • Sea State

      Slight, becoming slight or moderate.
    • Weather

      Squally thundery showers for a time.
    • Visibility

      Good, occasionally poor.

    23:00 UTC Sat 4th Jul – 22:59 UTC Sun 5th Jul

    • Wind

      South 3 or 4, occasionally 5 at first, then becoming variable 2 for a time.
    • Sea State

      Slight near Sutherland, otherwise slight or moderate.
    • Weather

      Thundery showers.
    • Visibility

      Moderate or good.

    Issued at 23:00 UTC on Friday 3rd Jul

  18. Shetland Isles * warning

    Shetland Isles

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    Strong wind warning

    23:00 UTC Fri 3rd Jul – 22:59 UTC Sat 4th Jul

    • Wind

      East 2 or 3 increasing 5 or 6, then decreasing 4 later.
    • Sea State

      Slight, becoming slight or moderate.
    • Weather

      Showers later, fog patches.
    • Visibility

      Moderate or good, occasionally very poor.

    23:00 UTC Sat 4th Jul – 22:59 UTC Sun 5th Jul

    • Wind

      --
    • Sea State

      --
    • Weather

      --
    • Visibility

      --

    Issued at 23:00 UTC on Friday 3rd Jul

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

    Gale Warnings in operation for Sea Area Fair Isle: Nil.

    23:00 UTC Fri 3rd Jul – 10:59 UTC Sat 4th Jul

    • Wind

      Variable 3 or less becoming east or southeast 5 or 6.
    • Sea State

      Slight, occasionally moderate later.
    • Weather

      Mist or fog patches.
    • Visibility

      Moderate or poor, occasionally very poor.

    11:00 UTC Sat 4th Jul – 22:59 UTC Sat 4th Jul

    • Wind

      Easterly or northeasterly 4 or 5, occasionally 6 at first in west and 3 later in east.
    • Sea State

      Moderate, but slight in shelter southwest of Shetland.
    • Weather

      Mist or fog patches at first, showers perhaps heavy at times later.
    • Visibility

      Moderate or poor, occasionally very poor at first.

    Issued at 23:00 UTC on Friday 3rd Jul

  19. The Channel Islands * warning

    The Channel Islands

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    Strong wind warning

    23:00 UTC Fri 3rd Jul – 22:59 UTC Sat 4th Jul

    • Wind

      Southwest 4 to 5, occasionally 6, decreasing 3 to 4 by mid morning, becoming variable 1 to 3 in the afternoon, locally northerly 2 to 4 in the south and east of the area.
    • Sea State

      Slight to moderate, becoming smooth or slight by afternoon.
    • Weather

      Isolated thundery showers and fog patches, clearing during the morning.
    • Visibility

      Good, occasionally moderate to very poor.

    23:00 UTC Sat 4th Jul – 22:59 UTC Sun 5th Jul

    • Wind

      Variable 1 to 3, occasionally 4 at first, becoming southwesterly 2 to 4 from mid morning.
    • Sea State

      Slight with a low swell.
    • Weather

      Risk of thundery showers in the southeast around dawn.
    • Visibility

      Good, perhaps moderate to poor in any showers.

    Issued at 23:00 UTC on Friday 3rd Jul