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High seas forecast

Issued at 0800 UTC on Saturday 18 August 2018
by the Met Office, Exeter, United Kingdom
for the period 0800 UTC Saturday 18 August until 0800 UTC Sunday 19 August 2018

General synopsis

At 180000UTC, tropical storm ernesto 50 north 27 west becoming extra-tropical, expected 54 north 10 west 1008 by 190000UTC. Low 61 north 14 west 985 expected 67 north 10 east 985 by same time. Low 50 north 37 west 1005 expected 53 north 24 west 1010 by that time. Low 69 north 05 east 989 losing its identity by 190000UTC. New low expected 63 north 37 west 1003 by same time. New high expected 51 north 39 west 1020 by that time

Area forecasts for the next 24 hours

Sole

West or southwest 5 to 7, decreasing 4 at times. Moderate, becoming rough. Occasional drizzle. Moderate or good.

Shannon

Southwest 4 or 5, increasing 6 to gale 8 for a time. Moderate or rough, occasionally very rough for a time. Rain and fog patches. Moderate, occasionally very poor.

Rockall

Westerly 5 to 7, becoming cyclonic, mainly northeasterly later, 4 or 5, occasionally gale 8 at first in north. Rough or very rough, occasionally moderate later. Rain and fog patches in south. Moderate or good, occasionally very poor in south.

Bailey

Southwest 7 to severe gale 9, veering west or northwest 4 or 5. Very rough or high, becoming moderate or rough later. Showers. Good, occasionally poor.

Faeroes

Southwest 7 to severe gale 9, veering west or northwest 4 or 5, occasionally 6 later. Very rough or high, becoming moderate or rough later. Showers. Good, occasionally poor.

Southeast Iceland

Cyclonic, mainly northerly, 5 to 7, becoming variable 4 later. Rough or very rough, becoming moderate later. Showers. Good.

East Northern Section

In north of area

Northwesterly 5 or 6, decreasing 3 or 4, then becoming variable at times later near icelandic coast. Rough, becoming slight or moderate. Mainly fair. Good.

In south of area

Westerly or northwesterly 4 or 5, becoming variable 3 or 4, occasionally 6 at first in east. Rough, becoming moderate. Occasional drizzle. Good, occasionally moderate.

West Northern Section

In far northwest of area

Southwesterly, becoming cyclonic, 4 or 5. Slight or moderate. Occasional drizzle later. Good, occasionally moderate later.

In rest of area

Westerly or southwesterly 4 or 5, increasing 6 at times in west. Moderate, occasionally rough at first in east. Occasional rain or drizzle later. Good, occasionally moderate later.

East Central Section

Cyclonic, becoming mainly westerly or southwesterly later, 6 to gale 8, decreasing 4 or 5. Moderate or rough, occasionally very rough for a time in central areas. Rain at times, thundery at first, fog patches. Moderate or good, occasionally very poor.

West Central Section

Cyclonic 5 or 6, becoming westerly or northwesterly 4 or 5, then becoming variable 3 or 4 later. Moderate, occasionally rough. Occasional rain or drizzle, thundery showers later in south, fog patches. Moderate or good, occasionally very poor.

Denmark Strait

Northerly 4 or 5 at first in far east, otherwise westerly or southwesterly, becoming variable at times, 3 or 4. Slight or moderate. Rain or drizzle at times later. Good, occasionally moderate later.

North Iceland

Cyclonic at first in far southeast, otherwise northerly or northwesterly 5 or 6, decreasing mainly 4 later in north and west. Moderate, occasionally rough in south. Occasional rain or drizzle, becoming mainly fair later in west. Moderate or good.

Norwegian Basin

Southwesterly, veering westerly or northwesterly, 5 to 7, increasing gale 8 at times. Rough or very rough. Occasional rain or squally showers. Moderate or poor, occasionally good.

Outlook for following 24 hours

No gales expected.

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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