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High Seas forecast

High seas forecasts for the next 24 hours

Issued: 0800 on Tue 30 Sep 2014 UTC

The high seas forecast, issued by the Met Office, on behalf of the Maritime and Coastguard Agency

Storm warnings

At 300000UTC, lows 62 north 37 west 955 and 59 north 28 west 973 merging expected 62 north 33 west 960 by 010000UTC. New low expected 70 north 21 west 973 by same time. Westerly winds will reach storm force 10 in the south of West Northern Section throughout and violent storm force 11 from 301200UTC until 010600UTC. Cyclonic winds will reach storm force 10 in the northwest of the East Northern Section until 301000UTC. Northerly or northeasterly winds will reach storm force 10 in the Denmark Strait and the northwest of north Iceland from 301000UTC and violent storm force 11 in the north of the Denmark Strait and the northwest or north Iceland from 301600UTC until 010400UTC

General synopsis

At 300000UTC, lows 62 north 37 west 955 and 59 north 28 west 973 merging expected 62 north 33 west 960 by 010000UTC. New low expected 70 north 21 west 973 by same time. High 39 north 45 west 1023 expected 47 north 32 west 1030 by that time. at 300000UTC, high 62 north 12 east 1027 expected 61 north 23 east 1031 by 010000UTC

Sole

Westerly or southwesterly, veering northwesterly in west later, 4 or 5 increasing 6 at times. Moderate occasionally rough in west. Showers. Moderate or good.

Shannon

West or southwest veering northwest later, 5 or 6. Moderate or rough, becoming very rough in northwest later. Occasional rain. Moderate or good.

Rockall

West or southwest 6 to gale 8. Rough or very rough, becoming very rough or high. Occasional rain. Moderate or good.

Bailey

South or southwest 6 to gale 8, occasionally severe gale 9. Rough or very rough, becoming high in west. Rain or showers. Moderate or good.

Faeroes

Southerly or southwesterly 6 to gale 8. Rough or very rough. Rain or showers. Moderate or good.

Southeast Iceland

Southerly or southwesterly 6 to gale 8, occasionally severe gale 9. Rough or very rough, becoming high in west. Rain or showers. Moderate or good.

East Northern Section

In northeast

Southeasterly 7 to severe gale 9, veering southwesterly 6 to gale 8 occasionally severe gale 9 later. Very rough, becoming high or very high. Rain or showers. Moderate or good, occasionally poor.

In south

Southerly or southwesterly 7 to severe gale 9, occasionally storm 10 in north later. Very rough, becoming high or very high, becoming phenomenal in northwest later. Rain or showers. Moderate or good, occasionally poor.

In northwest

cyclonic gale 8 to storm 10, occasionally violent storm 11 at first, becoming southerly or southwesterly 7 to severe gale 9, decreasing 5 or 6 in far northwest later. Very rough or high, becoming high or very high. Rain or showers. Moderate or good, occasionally poor.

West Northern Section

In north

Cyclonic gale 7 to severe gale 9, increasing storm 10 at times. Very rough or high, occasionally very high in south. Rain or showers. Moderate or good, occasionally poor.

In south

Westerly or southwesterly gale 8 to storm 10, increasing violent storm 11 for a time. Very rough or high, becoming high or very high, then phenomenal in northeast later. Rain or showers. Moderate or good, occasionally poor.

East Central Section

In southeast

Southwesterly 5 or 6 occasionally 7 for a time in northwest, veering northerly or northwesterly 4 or 5 later. Moderate or rough, occasionally very rough in northwest. Occasional rain. Moderate or good.

In northwest

Westerly or southwesterly 6 to gale 8. Very rough or high, becoming very high in far northwest later. Rain then showers. Good, occasionally moderate for a time.

West Central Section

In south

Northwesterly but southwesterly at first in southeast, backing westerly then southwesterly later, 5 to 7, but becoming variable 3 or 4 for a time in south. Rough or very rough, occasionally high in north. Occasional rain. Moderate or good, occasionally poor.

In north

Westerly or southwesterly 6 to gale 8, occasionally severe gale 9 for a time in north. Very rough or high, occasionally very high in north. Rain or showers. Moderate or good, occasionally poor.

Denmark Strait

In area north of 69 north

Northerly or northeasterly becoming cyclonic in south later, gale 8 to storm 10 increasing violent storm 11 at times. Moderate or rough, becoming very rough or high. Occasional snow. Moderate or poor, occasionally very poor. Moderate or severe icing with temperatures ms02 to ms04.

In area south of 69 north

Northeasterly 7 to severe gale 9, increasing storm 10 for a time. High or very high, becoming very rough or high. Occasional rain or snow. Moderate or poor, occasionally very poor.

North Iceland

In north

Easterly or northeasterly 7 to severe gale 9, increasing storm 10 or violent storm 11 in far northwest, becoming cyclonic 6 to gale 8 elsewhere, then southeasterly 5 or 6. Moderate or rough, becoming rough or very rough, but high in far northwest. Occasional rain or snow. Moderate or poor, occasionally very poor. Moderate or severe icing in far northwest with temperatures ms02 to ms05.

In south

southerly or southeasterly but cyclonic for a time in west, 6 to gale 8. Moderate or rough, becoming rough or very rough. Rain or showers. Moderate or good, occasionally poor.

Norwegian Basin

Southerly or southeasterly, veering southwesterly in west later, 5 to 7 occasionally gale 8 later. Moderate or rough, becoming rough or very rough. Occasional rain. Moderate or good, occasionally poor.

Outlook for following 24 hours

From Wed 01 Oct 2014

Storms expected in East Northern Section, West Northern Section, Denmark Strait and north Iceland. Severe gales expected in Rockall, Bailey, Faeroes, Southeast Iceland, East Central Section and West Central Section. Gales expected in Norwegian Basin.

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

High Seas overview

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.