Y Tywydd Rhagolwg Llongau

Gosodiadau
Iaith

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

Map of shipping forecast areas

The general synopsis at midnight

High Fitzroy 1027 expected Biscay 1025 by midnight tonight. Low Viking 1000 slow-moving, losing its identity

Issued 20 August 04:05 UTC

  1. Viking

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    • Wind

      Northwesterly 5 to 7, decreasing 4 later.
    • Sea State

      Moderate or rough.
    • Weather

      Squally showers.
    • Visibility

      Good.
  2. North Utsire

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    • Wind

      Northwesterly 5 to 7, decreasing 4 later.
    • Sea State

      Moderate.
    • Weather

      Squally showers.
    • Visibility

      Good.
  3. South Utsire

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    • Wind

      Northwesterly 5 to 7.
    • Sea State

      Moderate or rough.
    • Weather

      Squally showers.
    • Visibility

      Good.
  4. Forties

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    • Wind

      In northeast, northwesterly 5 to 7, decreasing 4 later. In southwest, westerly or northwesterly 5 or 6 becoming variable 3 or 4.
    • Sea State

      In northeast, moderate or rough. in southwest, slight or moderate.
    • Weather

      In northeast, squally showers. In southwest, showers.
    • Visibility

      Good.
  5. Cromarty

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    • Wind

      Westerly or northwesterly 5 or 6 becoming variable 3 or 4.
    • Sea State

      Slight or moderate.
    • Weather

      Showers.
    • Visibility

      Good.
  6. Forth

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    • Wind

      Westerly or northwesterly 5 or 6 becoming variable 3 or 4.
    • Sea State

      Slight or moderate.
    • Weather

      Showers.
    • Visibility

      Good.
  7. Tyne

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    • Wind

      Westerly or northwesterly 5 or 6 becoming variable 3 or 4.
    • Sea State

      Slight or moderate.
    • Weather

      Showers.
    • Visibility

      Good.
  8. Dogger

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    • Wind

      Westerly or northwesterly 5 or 6 becoming variable 3 or 4.
    • Sea State

      Slight or moderate in southwest, moderate or rough in northeast.
    • Weather

      Showers.
    • Visibility

      Good.
  9. Fisher

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    • Wind

      West veering northwest 5 to 7.
    • Sea State

      Moderate or rough.
    • Weather

      Showers, thundery or squally at first.
    • Visibility

      Good, occasionally moderate.
  10. German Bight

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    • Wind

      West veering northwest 5 to 7.
    • Sea State

      Moderate or rough.
    • Weather

      Showers, thundery or squally at first.
    • Visibility

      Good, occasionally moderate.
  11. Humber

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    • Wind

      West or southwest 5 or 6 becoming variable 3 or 4.
    • Sea State

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

      Showers.
    • Visibility

      Good.
  12. Thames

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    • Wind

      West or southwest 5 or 6 becoming variable 3 or 4.
    • Sea State

      Slight or moderate.
    • Weather

      Showers.
    • Visibility

      Good.
  13. Dover

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    • Wind

      West backing southwest, then becoming cyclonic later, 4 or 5.
    • Sea State

      Slight or moderate.
    • Weather

      Rain later.
    • Visibility

      Good, occasionally poor later.
  14. Wight

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    • Wind

      West or southwest, backing south for a time, 4 or 5, occasionally 6.
    • Sea State

      Slight or moderate.
    • Weather

      Fair then occasional rain, fog patches developing.
    • Visibility

      Moderate or good, occasionally very poor.
  15. Portland

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    • Wind

      West or southwest, backing south for a time, 4 or 5, occasionally 6.
    • Sea State

      Slight or moderate.
    • Weather

      Fair then occasional rain, fog patches developing.
    • Visibility

      Moderate or good, occasionally very poor.
  16. Plymouth

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    • Wind

      West or southwest, backing south for a time, 4 or 5, occasionally 6.
    • Sea State

      Slight or moderate.
    • Weather

      Fair then occasional rain, fog patches developing.
    • Visibility

      Moderate or good, occasionally very poor.
  17. Biscay

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    • Wind

      Easterly 5 or 6 in southwest and southwesterly 5 at first in far north, otherwise variable 3 or 4.
    • Sea State

      Slight or moderate.
    • Weather

      Mainly fair.
    • Visibility

      Mainly good.
  18. Trafalgar

    Gale Warning: Gale warning issued 19 August 17:44 UTC

    Easterly gale force 8 expected soon

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    • Wind

      Easterly 6 to gale 8 in far southeast, otherwise northerly 4 or 5, occasionally 6 at first.
    • Sea State

      Moderate or rough.
    • Weather

      Fog patches.
    • Visibility

      Moderate or good, occasionally very poor.
  19. FitzRoy

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    • Wind

      In south, northeasterly 5 to 7, but variable 3 or 4 in northwest. In north, southwesterly 4 or 5.
    • Sea State

      Moderate or rough.
    • Weather

      In south, fair. In north, occasional rain or drizzle, fog patches.
    • Visibility

      In south, good. In north, moderate or good, occasionally very poor.
  20. Sole

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    • Wind

      Southwesterly 4 or 5, backing southerly 5 or 6 for a time at first.
    • Sea State

      Moderate, occasionally rough.
    • Weather

      Occasional rain or drizzle, fog patches.
    • Visibility

      Moderate or good, occasionally very poor.
  21. Lundy

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    • Wind

      Southwesterly 4 or 5, backing southerly 5 or 6 for a time at first.
    • Sea State

      Slight or moderate.
    • Weather

      Occasional rain or drizzle, fog patches.
    • Visibility

      Moderate or good, occasionally very poor.
  22. Fastnet

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    • Wind

      Southwesterly 4 or 5, backing southerly 5 or 6 for a time at first.
    • Sea State

      Slight or moderate.
    • Weather

      Occasional rain or drizzle, fog patches.
    • Visibility

      Moderate or good, occasionally very poor.
  23. Irish Sea

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    • Wind

      West becoming variable then mainly east, 3 or 4, increasing 5 at times.
    • Sea State

      Slight, occasionally moderate.
    • Weather

      Fair then rain.
    • Visibility

      Good, occasionally poor.
  24. Shannon

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    • Wind

      Southeasterly veering southerly or southwesterly, 4 or 5, occasionally 6 at first.
    • Sea State

      Moderate, becoming moderate or rough.
    • Weather

      Rain or drizzle, fog patches.
    • Visibility

      Moderate or good, occasionally very poor.
  25. Rockall

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    • Wind

      In south, southeasterly veering southerly or southwesterly, 4 or 5, occasionally 6 at first. In north, variable 3 or 4 becoming southeasterly 5 or 6.
    • Sea State

      Moderate, becoming moderate or rough.
    • Weather

      In south, rain or drizzle, fog patches. In north, rain later.
    • Visibility

      In south, moderate or good, occasionally very poor. In north, good, occasionally poor later.
  26. Malin

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    • Wind

      Variable 3 or 4 becoming southeasterly 5 or 6.
    • Sea State

      Moderate.
    • Weather

      Rain later.
    • Visibility

      Good, occasionally poor later.
  27. Hebrides

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    • Wind

      Variable 3 or 4 becoming east 4 or 5, occasionally 6 later.
    • Sea State

      Moderate.
    • Weather

      Showers then fair.
    • Visibility

      Good.
  28. Bailey

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    • Wind

      Variable 3 or 4 becoming east 4 or 5, occasionally 6 later.
    • Sea State

      Moderate, becoming rough later in southwest.
    • Weather

      Showers then fair.
    • Visibility

      Good.
  29. Fair Isle

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    • Wind

      Northwest 5 or 6 decreasing 3 or 4.
    • Sea State

      Moderate or rough becoming slight or moderate.
    • Weather

      Showers.
    • Visibility

      Good.
  30. Faeroes

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    • Wind

      Northwest 5 or 6 decreasing 3 or 4.
    • Sea State

      Moderate or rough becoming slight or moderate.
    • Weather

      Showers.
    • Visibility

      Good.
  31. Southeast Iceland

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    • Wind

      Northwesterly 4 or 5 at first in east, otherwise variable 3 or 4.
    • Sea State

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

      Showers then fair.
    • Visibility

      Good.