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High seas forecast

Issued at:

For the period to

General synopsis

At 151200UTC, low 59 north 30 west 961 expected 60 north 27 west 969 by 161200UTC. Low northwest Ireland 984 expected sea area Faeroes 983 by same time. New low expected 50 north 38 west 971 by that time. New high expected 77 north 15 west 1017 by 161200UTC. Low sea area Shannon 982 losing its identity by same time. High southern Greenland 995 dissipating by that time

Sole
Wind
Westerly or southwesterly 6 to gale 8.
Sea state
Very rough, occasionally high at first.
Weather
Squally showers.
Visibility
Good, occasionally poor.
Shannon
Wind
West or southwest 5 to 7, occasionally gale 8 at first.
Sea state
Very rough, occasionally high at first.
Weather
Squally showers.
Visibility
Good, occasionally poor.
Rockall
Wind
Cyclonic 6 to gale 8, occasionally severe gale 9 at first, becoming southwest 5 to 7.
Sea state
Very rough or high, occasionally rough later.
Weather
Rain or squally showers.
Visibility
Good, occasionally poor.
Bailey
Wind
Cyclonic, becoming south, 5 to 7, becoming variable 4 at times.
Sea state
Very rough or high.
Weather
Rain or showers.
Visibility
Moderate or good.
Faeroes
Wind
Southeasterly, becoming cyclonic, 6 to gale 8, occasionally severe gale 9, decreasing 4 or 5 except in northeast.
Sea state
Very rough or high.
Weather
Rain or showers.
Visibility
Good, occasionally poor.
Southeast Iceland
Wind
Southeasterly, becoming cyclonic, 6 to gale 8, decreasing 4 or 5 except in northeast.
Sea state
Very rough or high.
Weather
Rain or showers.
Visibility
Good, occasionally poor.
East Northern Section
Wind
Cyclonic 5 to 7, increasing gale 8 at times, becoming variable 3 or 4 for a time in far northeast.
Sea state
Very rough or high, occasionally rough later.
Weather
Occasional rain or squally showers.
Visibility
Moderate or good, occasionally poor.
West Northern Section
Wind
Cyclonic 6 to gale 8, occasionally severe gale 9 in northwest, decreasing 5 at times later in south.
Sea state
Rough or very rough, occasionally high.
Weather
Occasional rain or squally showers, turning to sleet or snow in northwest.
Visibility
Moderate or good, occasionally poor, or very poor in northwest.
East Central Section
High seas storm warning - issued: 20:00 on Sat 15 Dec 2018 UTC

At 151200UTC, low 59 north 30 west 961 expected 60 north 27 west 969 by 161200UTC. Northeasterly winds will reach storm force 10 in Denmark Strait north of 66 north throughout. Northeasterly winds will also reach violent storm force 11 in Denmark Strait north of 68 north until 160200UTC. Low northwest Ireland 984 expected sea area Faeroes 983 by same time. Southeasterly winds will reach storm force 10 in the southwest of Norwegian Basin between 152300UTC and 161700UTC. New low expected 50 north 38 west 971 by that time. Westerly or southwesterly winds will reach storm force 10 in the southern half of West Central Section after 160700UTC and the southwestern quadrant of East Central Section after 161700UTC.

Wind
Westerly or southwesterly 6 to gale 8, becoming cyclonic gale 8 to storm 10 later except in far north and far east.
Sea state
Very rough or high.
Weather
Occasional rain or thundery showers.
Visibility
Moderate or good, occasionally poor.
West Central Section
High seas storm warning - issued: 20:00 on Sat 15 Dec 2018 UTC

At 151200UTC, low 59 north 30 west 961 expected 60 north 27 west 969 by 161200UTC. Northeasterly winds will reach storm force 10 in Denmark Strait north of 66 north throughout. Northeasterly winds will also reach violent storm force 11 in Denmark Strait north of 68 north until 160200UTC. Low northwest Ireland 984 expected sea area Faeroes 983 by same time. Southeasterly winds will reach storm force 10 in the southwest of Norwegian Basin between 152300UTC and 161700UTC. New low expected 50 north 38 west 971 by that time. Westerly or southwesterly winds will reach storm force 10 in the southern half of West Central Section after 160700UTC and the southwestern quadrant of East Central Section after 161700UTC.

In south

Wind
Westerly 6 to gale 8, becoming cyclonic gale 8 to storm 10.
Sea state
Very rough or high, occasionally very high later in east.
Weather
Occasional rain or thundery showers, wintry later in southwest.
Visibility
Moderate or good, occasionally poor.

In north

Wind
Westerly 6 to gale 8, becoming cyclonic 7 to severe gale 9, but decreasing 5 or 6 at times in northern half of area.
Sea state
Very rough or high, occasionally rough.
Weather
Occasional rain or showers, thundery later.
Visibility
Moderate or good, occasionally poor.
Denmark Strait
High seas storm warning - issued: 20:00 on Sat 15 Dec 2018 UTC

At 151200UTC, low 59 north 30 west 961 expected 60 north 27 west 969 by 161200UTC. Northeasterly winds will reach storm force 10 in Denmark Strait north of 66 north throughout. Northeasterly winds will also reach violent storm force 11 in Denmark Strait north of 68 north until 160200UTC. Low northwest Ireland 984 expected sea area Faeroes 983 by same time. Southeasterly winds will reach storm force 10 in the southwest of Norwegian Basin between 152300UTC and 161700UTC. New low expected 50 north 38 west 971 by that time. Westerly or southwesterly winds will reach storm force 10 in the southern half of West Central Section after 160700UTC and the southwestern quadrant of East Central Section after 161700UTC.

Wind
Northerly or northeasterly gale 8 to storm 10, occasionally violent storm 11 at first in north.
Sea state
Very rough or high, occasionally rough.
Weather
Occasional sleet or snow.
Visibility
Moderate, occasionally very poor. Occasional moderate or severe icing with temperatures ms03 to ms06, becoming very severe at times in north with temperatures ms07 to ms10.
North Iceland

In northwest

Wind
Easterly or northeasterly 6 to gale 8, occasionally severe gale 9 in south.
Sea state
Rough or very rough, occasionally high in south.
Weather
Occasional sleet or snow.
Visibility
Moderate, occasionally very poor. Occasional severe icing, becoming very severe at times in south, with temperatures ms07 to ms10.

In southeast

Wind
Easterly or southeasterly, becoming cyclonic later in south, 6 to gale 8, occasionally severe gale 9 in far south.
Sea state
Very rough or high, occasionally rough in north.
Weather
Occasional rain or showers.
Visibility
Moderate or good, occasionally poor.
Norwegian Basin
High seas storm warning - issued: 20:00 on Sat 15 Dec 2018 UTC

At 151200UTC, low 59 north 30 west 961 expected 60 north 27 west 969 by 161200UTC. Northeasterly winds will reach storm force 10 in Denmark Strait north of 66 north throughout. Northeasterly winds will also reach violent storm force 11 in Denmark Strait north of 68 north until 160200UTC. Low northwest Ireland 984 expected sea area Faeroes 983 by same time. Southeasterly winds will reach storm force 10 in the southwest of Norwegian Basin between 152300UTC and 161700UTC. New low expected 50 north 38 west 971 by that time. Westerly or southwesterly winds will reach storm force 10 in the southern half of West Central Section after 160700UTC and the southwestern quadrant of East Central Section after 161700UTC.

Wind
West of 05 east, southerly or southeasterly 7 to severe gale 9, occasionally storm 10 in south.
Sea state
Very rough or high, occasionally very high later in south.
Weather
Occasional rain or showers, squally later.
Visibility
Moderate or good, occasionally poor.
Wind
East of 05 east, southerly 4 or 5, increasing 6 or 7 at times in far east of area and in far west of area.
Sea state
Rough or very rough, occasionally high in far west.
Weather
Fair.
Visibility
Good.

Outlook for following 24 hours

Storms expected in East Northern Section, East Central Section, West Central Section and Denmark Strait. Severe gales expected in all areas.

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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