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High seas forecast

Issued at:

For the period to

General synopsis

At 231200UTC, developing Atlantic low moving rapidly northeast, expected 60 north 03 west 958 by 241200UTC. Low 58 north 37 west 971 moving rather quickly southeast and losing its identity by same time. Low 58 north 27 west 963 expected 57 north 20 west 971 by that time. at 231200UTC, high 44 north 56 west 1032 expected 41 north 39 west 1037 by 241200UTC. Lows 56 north 31 west 967 and 64 north 05 west 979 both losing their identities. High 71 north 27 west 1019 dissipating.

Sole
Wind
Southwest 6 to gale 8, occasionally severe gale 9.
Sea state
Rough or very rough, increasing very rough or high, very high for a time in west.
Weather
Rain or showers.
Visibility
Good, occasionally poor.
Shannon
High seas storm warning - issued: 20:00 on Tue 23 Jan 2018 UTC

At 231200UTC, developing Atlantic low moving rapidly northeast, expected 60 north 03 west 958 by 241200UTC. Westerly or southwesterly winds will reach storm force 10 in the northeast of East Central Section until 232300UTC, in the north of Shannon between 232200UTC and 240200UTC and in Rockall between 232300UTC and 240800UTC. Westerly or southwesterly winds will also reach violent storm force 11 at times in the northeast of Rockall between 240200UTC and 240700UTC. Low 58 north 37 west 971 moving rather quickly southeast and losing its identity by same time. Westerly or northwesterly winds will reach storm force 10 at times in the north of West Central Section until 241600UTC and in the north of East Central Section after 240200UTC. In addition, northeasterly winds will reach storm force 10 at times in Denmark Strait to the south of 67 north until 240100UTC, and also in the northwest of West Northern Section until 240200UTC.

Wind
Southwest 7 to severe gale 9, increasing storm 10.
Sea state
Very rough or high becoming very high for a time.
Weather
Rain then squally showers.
Visibility
Good, occasionally poor.
Rockall
High seas storm warning - issued: 20:00 on Tue 23 Jan 2018 UTC

At 231200UTC, developing Atlantic low moving rapidly northeast, expected 60 north 03 west 958 by 241200UTC. Westerly or southwesterly winds will reach storm force 10 in the northeast of East Central Section until 232300UTC, in the north of Shannon between 232200UTC and 240200UTC and in Rockall between 232300UTC and 240800UTC. Westerly or southwesterly winds will also reach violent storm force 11 at times in the northeast of Rockall between 240200UTC and 240700UTC. Low 58 north 37 west 971 moving rather quickly southeast and losing its identity by same time. Westerly or northwesterly winds will reach storm force 10 at times in the north of West Central Section until 241600UTC and in the north of East Central Section after 240200UTC. In addition, northeasterly winds will reach storm force 10 at times in Denmark Strait to the south of 67 north until 240100UTC, and also in the northwest of West Northern Section until 240200UTC.

Wind
Southwest 7 to severe gale 9, increasing storm 10, but cylconic violent storm 11 for a time.
Sea state
Very rough or high becoming very high for a time.
Weather
Rain then squally showers.
Visibility
Good, occasionally poor.
Bailey
Wind
South or southwest becoming cycloninc 5 or 6, increasing 7 or gale 8 for a time in east.
Sea state
Very rough or high.
Weather
Rain then squally showers.
Visibility
Good, occasionally poor.
Faeroes
Wind
Southwest, 5 to 7 becoming cyclonic 6 to gale 8 later.
Sea state
Rough or very rough occasionally high later.
Weather
Rain.
Visibility
Good, occasionally poor.
Southeast Iceland
Wind
Easterly 6 t0 gale 8 backing northerly 7 to severe gale 9.
Sea state
Very rough, occasionally high in west.
Weather
Wintry showers.
Visibility
Moderate or poor.
East Northern Section

In northeast

Wind
Cyclonic 5 or 6 becoming northerly or northeasterly 6 to gale 8.
Sea state
Very rough or high.
Weather
Rain or showers.
Visibility
Moderate or poor.

In northwest

Wind
Northeasterly 6 to gale 8, occasionally severe gale 9 at first in far northwest.
Sea state
Very rough or high.
Weather
Showers, wintry in north.
Visibility
Moderate or poor.

In southeast

Wind
Southerly or southwesterly 5 to 7 becoming cyclonic 6 to gale 8, occasionally severe gale 9 in south.
Sea state
High, becoming very rough in north.
Weather
Rain or thundery showers.
Visibility
Moderate or poor.

In southwest

Wind
Cyclonic 6 to gale 8 becoming westerly or northwesterly 7 to severe gale 9.
Sea state
High, becoming very rough in north.
Weather
Rain or showers.
Visibility
Moderate or poor.
West Northern Section
High seas storm warning - issued: 20:00 on Tue 23 Jan 2018 UTC

At 231200UTC, developing Atlantic low moving rapidly northeast, expected 60 north 03 west 958 by 241200UTC. Westerly or southwesterly winds will reach storm force 10 in the northeast of East Central Section until 232300UTC, in the north of Shannon between 232200UTC and 240200UTC and in Rockall between 232300UTC and 240800UTC. Westerly or southwesterly winds will also reach violent storm force 11 at times in the northeast of Rockall between 240200UTC and 240700UTC. Low 58 north 37 west 971 moving rather quickly southeast and losing its identity by same time. Westerly or northwesterly winds will reach storm force 10 at times in the north of West Central Section until 241600UTC and in the north of East Central Section after 240200UTC. In addition, northeasterly winds will reach storm force 10 at times in Denmark Strait to the south of 67 north until 240100UTC, and also in the northwest of West Northern Section until 240200UTC.

In north

Wind
Northeasterly 7 to severe gale 9, occasionally storm 10 at first in northwest, backing northerly 5 to 7 later, then becoming variable 3 or 4 later in west.
Sea state
Very rough or high, becoming rough later in west.
Weather
Rain or showers, with snow in northwest, then becoming fair in west.
Visibility
Moderate or good, becoming poor at times, but occasionally very poor at first in northwest.

In south

Wind
Northwesterly 6 to gale 8, occasionally severe gale 9 in south and west, then decreasing 5 later in west.
Sea state
Very rough or high.
Weather
Rain or showers, occasionally wintry in west.
Visibility
Moderate or poor.
East Central Section
High seas storm warning - issued: 20:00 on Tue 23 Jan 2018 UTC

At 231200UTC, developing Atlantic low moving rapidly northeast, expected 60 north 03 west 958 by 241200UTC. Westerly or southwesterly winds will reach storm force 10 in the northeast of East Central Section until 232300UTC, in the north of Shannon between 232200UTC and 240200UTC and in Rockall between 232300UTC and 240800UTC. Westerly or southwesterly winds will also reach violent storm force 11 at times in the northeast of Rockall between 240200UTC and 240700UTC. Low 58 north 37 west 971 moving rather quickly southeast and losing its identity by same time. Westerly or northwesterly winds will reach storm force 10 at times in the north of West Central Section until 241600UTC and in the north of East Central Section after 240200UTC. In addition, northeasterly winds will reach storm force 10 at times in Denmark Strait to the south of 67 north until 240100UTC, and also in the northwest of West Northern Section until 240200UTC.

Wind
Westerly or southwesterly, veering northwesterly in west, 7 to severe gale 9, occasionally storm 10 in north, decreasing 6 at times in south.
Sea state
High or very high.
Weather
Rain or thundery showers.
Visibility
Moderate or poor.
West Central Section
High seas storm warning - issued: 20:00 on Tue 23 Jan 2018 UTC

At 231200UTC, developing Atlantic low moving rapidly northeast, expected 60 north 03 west 958 by 241200UTC. Westerly or southwesterly winds will reach storm force 10 in the northeast of East Central Section until 232300UTC, in the north of Shannon between 232200UTC and 240200UTC and in Rockall between 232300UTC and 240800UTC. Westerly or southwesterly winds will also reach violent storm force 11 at times in the northeast of Rockall between 240200UTC and 240700UTC. Low 58 north 37 west 971 moving rather quickly southeast and losing its identity by same time. Westerly or northwesterly winds will reach storm force 10 at times in the north of West Central Section until 241600UTC and in the north of East Central Section after 240200UTC. In addition, northeasterly winds will reach storm force 10 at times in Denmark Strait to the south of 67 north until 240100UTC, and also in the northwest of West Northern Section until 240200UTC.

In northeast

Wind
Westerly or northwesterly 7 to severe gale 9, occasionally storm 10 until later in north.
Sea state
High or very high.
Weather
Squally showers, wintry at times.
Visibility
Moderate or poor.

In southwest

Wind
Northwesterly 6 to gale 8, occasionally severe gale 9 at first, then backing westerly or southwesterly 4 or 5 later.
Sea state
High or very high, becoming very rough.
Weather
Rain or squally showers, then becoming fair later in far southwest.
Visibility
Moderate or poor, occasionally good later.
Denmark Strait
High seas storm warning - issued: 20:00 on Tue 23 Jan 2018 UTC

At 231200UTC, developing Atlantic low moving rapidly northeast, expected 60 north 03 west 958 by 241200UTC. Westerly or southwesterly winds will reach storm force 10 in the northeast of East Central Section until 232300UTC, in the north of Shannon between 232200UTC and 240200UTC and in Rockall between 232300UTC and 240800UTC. Westerly or southwesterly winds will also reach violent storm force 11 at times in the northeast of Rockall between 240200UTC and 240700UTC. Low 58 north 37 west 971 moving rather quickly southeast and losing its identity by same time. Westerly or northwesterly winds will reach storm force 10 at times in the north of West Central Section until 241600UTC and in the north of East Central Section after 240200UTC. In addition, northeasterly winds will reach storm force 10 at times in Denmark Strait to the south of 67 north until 240100UTC, and also in the northwest of West Northern Section until 240200UTC.

Wind
Northeasterly 7 to severe gale 9, occasionally storm 10 at first to the south of 67 north, but decreasing 4 or 5 near ice edge.
Sea state
High at first in south, otherwise rough or very rough, but becoming moderate near ice edge.
Weather
Snow showers, but becoming fair except near Iceland.
Visibility
Moderate or good, occasionally very poor. Moderate or severe icing within 100 miles of ice edge, but gradually becoming confined to the east, with temperatures ms05 to ms08.
North Iceland

In far southeast

Wind
Cyclonic, becoming northerly or northeasterly later, 5 to 7.
Sea state
Rough becoming very rough.
Weather
Moderate or poor, occasionally good.

In north

Wind
Northeasterly, backing northerly later, 5 or 6.
Sea state
Moderate or rough.
Weather
Wintry showers.
Visibility
Good, occasionally poor. Light or moderate icing developing near ice edge, with temperatures ms03 to ms06.

In rest of region

Wind
Northeasterly, backing northerly later, 6 to gale 8, increasing severe gale 9 at times.
Sea state
Very rough or high.
Weather
Rain or showers.
Visibility
Moderate or poor.
Norwegian Basin
Wind
Variable or cyclonic, mainly 6 to gale 8, but 4 or 5 at first in central and western areas, then increasing severe gale 9 at times later in south.
Sea state
Rough or very rough, becoming high later in south.
Weather
Rain or showers, with sleet at times in northeast.
Visibility
Moderate or good, occasionally poor.

Outlook for following 24 hours

Severe gales expected in Shannon, Rockall, Southeast Iceland, West Northern Section, East Central Section, West Central Section, the far south of sea area north Iceland and the south of Norwegian Basin. Gales expected in Sole, Bailey, Faeroes, East Northern Section and the far east of Denmark Strait.

Unscheduled storm warnings are broadcast via Safetynet and in bulletin WONT54 EGRR available via some internet and ftpmail outlets

High seas forecast and storm warnings

High seas forecasts are issued twice daily at 0930 and 2130 GMT and cover the next 24 hours and outlooks for the following 24 hours.

The part of the North Atlantic known as Metarea I is divided into twelve sea areas, six of which are also in the Shipping forecast.

The high seas forecast contains a general synopsis and sea-area forecasts containg forecast wind direction and force, weather and visibility for the next 24 hours with an outlook for the following 24 hours.

 

In the UK, the Maritime & Coastguard Agency (MCA) is responsible for the provision of Maritime Safety Information (MSI) to ships at sea, which includes the broadcast of warnings and forecasts. The Met Office initiates warnings and prepares routine forecasts for dissemination on behalf of the MCA.

Caution: The internet is not part of the Maritime Safety Information system and should never be relied upon as the only means to obtain the latest forecast and warning information. Access to the service may be interrupted or delayed from time to time, updates may also be delayed. Please refer to GMDSS services, INMARSAT SafetyNET or international NAVTEX for the latest information. When using these web pages, always check that the page on your screen is not from your cache. Use the Refresh or Reload button if in any doubt.

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