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High seas forecast

Issued at 2000 UTC on Sunday 21 October 2018
by the Met Office, Exeter, United Kingdom
for the period 2000 UTC Sunday 21 October until 2000 UTC Monday 22 October 2018

General synopsis

At 211200UTC, high 49 north 29 west 1043, expected 52 north 20 west 1046 by 221200UTC. Low 74 north 06 east 957, expected 75 north 10 east 964 by same time. New low expected 63 north 28 west 996 by that time.

Area forecasts for the next 24 hours

Sole

North or northeast 5 to 7, occasionally 4 later. Rough, occasionally moderate at first. Occasional drizzle, then fair. Good, occasionally moderate.

Shannon

Northerly, backing westerly or northwesterly 5 or 6, becoming variable 3 or 4 except in far north. Rough, becoming very rough in north. Fair. Good.

Rockall

Westerly 5 to 7, occasionally gale 8 in north. Rough or very rough, becoming high in north. Showers in north. Moderate or good, occasionally poor in north.

Bailey

West 7 to severe gale 9. Very rough or high. Squally showers then rain. Moderate, occasionally poor.

Faeroes

West 7 to severe gale 9. Very rough or high. Squally showers then rain. Moderate, occasionally poor.

Southeast Iceland

Westerly 7 to severe gale 9, becoming cyclonic 3 or 4 later in far north. High, becoming rough or very rough in north. Squally showers then rain. Moderate, occasionally poor.

East Northern Section

Westerly or southwesterly 6 to gale 8, occasionally severe gale 9 at first, becoming cyclonic 4 or 5 later in far north. Very rough or high. Rain or squally showers. Moderate or poor.

West Northern Section

Southwesterly 6 to gale 8, becoming cyclonic and decreasing 5 at times in north. Very rough or high. Rain, fog patches developing. Moderate or poor, occasionally very poor.

East Central Section

Westerly 5 or 6 in far north, and easterly 5 or 6 in far south, otherwise variable 3 or 4. Rough or very rough. Mainly fair. Moderate or good.

West Central Section

Southerly or southeasterly 5 to 7, occasionally gale 8 for a time in north, then decreasing 4 at times later in south. Moderate or rough, occasionally very rough in far north. Rain and fog patches later in northwest. Moderate or good, occasionally very poor later in northwest.

Denmark Strait

Cyclonic 5 or 6, occasionally 7 at first in north, but decreasing 3 or 4 at times later. Rough or very rough, becoming high for a time in south. Wintry showers. Moderate, occasionally very poor. Occasional light icing later in northwest, with temperatures ms02 to ms04.

North Iceland

Variable 3 or 4 for a time in far south, otherwise northerly or northeasterly 6 to gale 8, occasionally severe gale 9 in northwest. Rough or very rough. Wintry showers in south, snow or squally snow showers in north. Moderate or poor, occasionally very poor in north. Moderate, perhaps severe icing north of 71 north with temperatures ms04 to ms06.

Norwegian Basin

Westerly or northwesterly 6 to gale 8, decreasing 5 at times. Very rough or high. Squally showers then rain. Moderate or poor.

Outlook for following 24 hours

Gales or severe gales are expected in all areas except East Central Section and 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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