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High Seas forecast

Issued at 0800 UTC on Thursday 25 May 2017
by the Met Office, Exeter, United Kingdom
for the period 0800 UTC Thursday 25 May until 0800 UTC Friday 26 May 2017

General synopsis

At 250000UTC, low 51 north 32 west 1000 expected 57 north 28 west 1003 by 260000UTC. Low 62 north 23 west 1001 expected 65 north 25 west 1007 by same time. Developing low near 43 north 57 west expected 43 north 39 west 994 by that time. New high expected 76 north 08 west 1025 by 260000UTC

Area forecasts for the next 24 hours

Sole

Southeast becoming cyclonic, 3 or 4, increasing 5 at times. Moderate. Fog patches, thundery showers. Moderate or good, occasionally very poor.

Shannon

South or southeast 4 or 5, occasionally variable 3 later. Moderate, occasionally rough at first. Drizzle and fog patches, then rain later. Moderate or good, occasionally very poor.

Rockall

South or southeast 4 or 5, occasionally variable 3 later. Moderate, occasionally rough at first. Drizzle and fog patches, then rain later. Moderate or good, occasionally very poor.

Bailey

Southwesterly backing southerly, 4 or 5. Moderate or rough. Drizzle, fog patches. Moderate or good, occasionally very poor.

Faeroes

Southwesterly backing southerly, 4 or 5. Slight or moderate. Drizzle, fog patches. Moderate or good, occasionally very poor.

Southeast Iceland

Cyclonic becoming southwesterly, then backing southerly, 4 or 5. Slight or moderate. Drizzle, fog patches. Moderate or good, occasionally very poor.

East Northern Section

In north

Cyclonic 4 or 5, occasionally 6 at first in far northwest, becoming variable mainly southeasterly 3 or 4. Moderate or rough. Rain, drizzle or showers, fog patches in east. Moderate or good, occasionally poor, but becoming very poor at times in east.

In southeast

Southerly 4 or 5, decreasing 3 later. Rough becoming moderate. Rain or drizzle at times, fog patches. Moderate or good, occasionally very poor.

In southwest

Variable 3 or 4. Moderate. Showers. Good, occasionally poor.

West Northern Section

In northwest

Northerly or northeasterly 4 or 5, increasing 5 to 7 in central and northern areas. Moderate, becoming rough in central and northern areas. Rain or showers. Moderate or good.

In southeast

Variable 3 or 4. Moderate. Rain or showers, fog patches. Moderate or good, occasionally very poor.

East Central Section

In east

Variable at first in south, otherwise southerly veering southwesterly, 3 or 4. Moderate. Rain or showers with fog patches, but becoming fair later. Moderate or good, occasionally very poor, becoming good later.

In west

Cyclonic 4 or 5 becoming westerly or southwesterly 3 or 4. Rough until later in south, otherwise moderate. Showers, thundery at first in north, then mainly fair. Good, occasionally moderate at first in north.

West Central Section

In far northeast

Variable becoming westerly, 3 or 4. Moderate. Showers, thundery at first. Moderate or good, occasionally poor at first.

In rest of region

Westerly or northwesterly 5 or 6 becoming variable 3 or 4, then becoming cyclonic 5 to 7 in far southwest. Rough at first in south, otherwise moderate. Showers then fair, then rain in west and south. Good, becoming moderate or poor in west and south.

Denmark Strait

In area south of 70 north

Northeasterly 5 to 7, occasionally gale 8 later. Moderate or rough, becoming rough or very rough later. Showers then rain, turning to snow in north and west. Good, becoming moderate or poor, occasionally very poor in north and west. Light icing developing later near ice edge, with temperatures ms02 or ms03.

In area north of 70 north

Variable 3 or 4. Slight. Mainly fair. Good, occasionally moderate.

North Iceland

In north

Variable 3 or 4. Slight. Snow showers. Good, occasionally poor.

In south

Easterly or northeasterly 5 or 6, occasionally 7 later in west, but variable 3 or 4 throughout in far southeast. Moderate, becoming moderate or rough except in southeast. Rain or drizzle, fog banks. Moderate or good, occasionally very poor.

Norwegian Basin

Westerly or southwesterly 5 or 6 in central areas, otherwise variable mainly southwesterly 3 or 4. Moderate. Rain or drizzle at times, fog patches in west and south. Moderate or good, occasionally poor, but becoming very poor at times in west and south.

Outlook for following 24 hours

Gales expected in West Northern Section, Denmark Strait and north Iceland.

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.

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