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The general synopsis at 21 December 20:00 UTC

At 211200UTC, low 66 north 15 west 970 expected 64 north 01 east 974 by 221200UTC. Low 62 north 28 west 965 expected 64 north 12 west 969 by same time. Low 46 north 41 west 1009 expected 44 north 42 west 1012 by that time. New low moving steadily northeastwards, expected 47 north 31 west 1000 by 221200UTC. High 45 north 01 west 1038, slow moving, declining 1032 by same time. High 42 north 19 west 1038 dissipating

Issued 21 December 20:00 UTC

  1. Sole

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    • Wind

      Southwest 6 to gale 8.
    • Sea State

      Rough or very rough.
    • Weather

      Occasional rain or drizzle.
    • Visibility

      Moderate or good, occasionally poor.
  2. Shannon

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    • Wind

      Southwest 6 to gale 8.
    • Sea State

      Rough or very rough becoming high.
    • Weather

      Rain or drizzle.
    • Visibility

      Moderate or poor, occasionally good.
  3. Rockall

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    • Wind

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

      Very rough becoming high.
    • Weather

      Rain, showers later.
    • Visibility

      Moderate or poor, becoming good.
  4. Bailey

    Storm warning issued 21 December 20:00 UTC

    At 211200UTC, low 66 north 15 west 970 expected 64 north 01 east 974 by 221200UTC. Low 62 north 28 west 965 expected 64 north 12 west 969 by same time. Westerly winds will reach storm force 10 at times in Bailey, Faeroes Southeast Iceland and the northeast of East Northern Section throughout, veering northerly or northeasterly after 221500UTC in the west of Southeast Iceland. Northeasterly winds will also reach storm force 10 in the east of Denmark Strait until 221500UTC.

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    • Wind

      West or southwest 7 to severe gale 9, occasionally storm 10.
    • Sea State

      High or very high.
    • Weather

      Squally wintry showers.
    • Visibility

      Moderate or good, occasionally poor.
  5. Faeroes

    Storm warning issued 21 December 20:00 UTC

    At 211200UTC, low 66 north 15 west 970 expected 64 north 01 east 974 by 221200UTC. Low 62 north 28 west 965 expected 64 north 12 west 969 by same time. Westerly winds will reach storm force 10 at times in Bailey, Faeroes Southeast Iceland and the northeast of East Northern Section throughout, veering northerly or northeasterly after 221500UTC in the west of Southeast Iceland. Northeasterly winds will also reach storm force 10 in the east of Denmark Strait until 221500UTC.

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    • Wind

      West or southwest 7 to severe gale 9, occasionally storm 10.
    • Sea State

      High or very high.
    • Weather

      Squally wintry showers.
    • Visibility

      Moderate or good, occasionally poor.
  6. Southeast Iceland

    Storm warning issued 21 December 20:00 UTC

    At 211200UTC, low 66 north 15 west 970 expected 64 north 01 east 974 by 221200UTC. Low 62 north 28 west 965 expected 64 north 12 west 969 by same time. Westerly winds will reach storm force 10 at times in Bailey, Faeroes Southeast Iceland and the northeast of East Northern Section throughout, veering northerly or northeasterly after 221500UTC in the west of Southeast Iceland. Northeasterly winds will also reach storm force 10 in the east of Denmark Strait until 221500UTC.

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    • Wind

      Westerly or southwesterly, becoming cyclonic later 7 to severe gale 9, occasionally storm 10.
    • Sea State

      High or very high.
    • Weather

      Squally wintry showers.
    • Visibility

      Moderate or good, occasionally poor.
  7. East Northern Section

    Storm warning issued 21 December 20:00 UTC

    At 211200UTC, low 66 north 15 west 970 expected 64 north 01 east 974 by 221200UTC. Low 62 north 28 west 965 expected 64 north 12 west 969 by same time. Westerly winds will reach storm force 10 at times in Bailey, Faeroes Southeast Iceland and the northeast of East Northern Section throughout, veering northerly or northeasterly after 221500UTC in the west of Southeast Iceland. Northeasterly winds will also reach storm force 10 in the east of Denmark Strait until 221500UTC.

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    • Wind

      Westerly 7 to severe gale 9, occasionally storm 10 in northeast.
    • Sea State

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

      Squally wintry showers.
    • Visibility

      Moderate or poor, occasionally good.
  8. West Northern Section

    Storm warning issued 21 December 08:00 UTC

    At 210000UTC, low 62 north 38 west 958 expected 65 north 13 west 964 by 220000UTC. Winds are expected to reach storm force 10 or violent storm force 11 between 50 and 250 miles of the centre in the southern quadrant until 220300UTC. Storm force 10 or violent storm force 11 northeasterly winds will continue through Denmark Strait south of 69 north.

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    • Wind

      Westerly 6 to gale 8, occasionally severe gale 9 at first.
    • Sea State

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

      Snow showers.
    • Visibility

      Good, occasionally poor.
  9. East Central Section

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    • Wind

      Westerly 5 or 6 in far north, otherwise southwesterly becoming cyclonic 6 to gale 8, occasionally severe gale 9 later in southwest.
    • Sea State

      Moderate or rough at first in southeast, otherwise very rough or high.
    • Weather

      Occasional rain, mainly in central areas.
    • Visibility

      Moderate or good, occasionally poor.
  10. West Central Section

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    • Wind

      Westerly or northwesterly 5 or 6, occasionally 7 in far north.
    • Sea State

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

      Fair then wintry showers.
    • Visibility

      Good, occasionally moderate.
  11. Denmark Strait

    Storm warning issued 21 December 20:00 UTC

    At 211200UTC, low 66 north 15 west 970 expected 64 north 01 east 974 by 221200UTC. Low 62 north 28 west 965 expected 64 north 12 west 969 by same time. Westerly winds will reach storm force 10 at times in Bailey, Faeroes Southeast Iceland and the northeast of East Northern Section throughout, veering northerly or northeasterly after 221500UTC in the west of Southeast Iceland. Northeasterly winds will also reach storm force 10 in the east of Denmark Strait until 221500UTC.

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    • Wind

      Northeasterly 7 to severe gale 9, occasionally storm 10 in east, decreasing 4 or 5 at times near ice edge.
    • Sea State

      Moderate or rough near ice edge, otherwise very rough or high.
    • Weather

      Snow or snow showers.
    • Visibility

      Moderate or poor, occasionally very poor at first, becoming good at times later. Moderate or severe icing within 100 miles of ice edge, except in south, with temperatures ms02 to ms05.
  12. North Iceland

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    • Wind

      Cyclonic, becoming mainly northeasterly 7 to severe gale 9, but mainly 5 to 7 for a time in southeast.
    • Sea State

      Rough until later near northeast iceland, otherwise very rough or high.
    • Weather

      Occasional rain, snow or wintry showers.
    • Visibility

      Moderate or poor, occasionally good, but very poor at times in northwest. Moderate or severe icing in northwest with temperatures ms02 to ms05.
  13. Norwegian Basin

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    • Wind

      Southeasterly in far northeast at first, otherwise mainly westerly or southwesterly, becoming cyclonic at times in north, 5 to 7, occasionally gale 8.
    • Sea State

      Rough or very rough, becoming high.
    • Weather

      Rain or wintry showers.
    • Visibility

      Moderate or good, occasionally poor.