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High seas forecast

Issued at 2000 UTC on Saturday 18 November 2017
by the Met Office, Exeter, United Kingdom
for the period 2000 UTC Saturday 18 November until 2000 UTC Sunday 19 November 2017

General synopsis

At 181200UTC, low 47 north 33 west 987 expected 56 north 23 west 993 by 191200UTC. Low 63 north 05 east 986 expected southern Baltic sea 992 by same time. New low expected 47 north 41 west 984 by that time. at 181200UTC, high sea area Biscay 1028 slow-moving with little change by 191200UTC

Area forecasts for the next 24 hours

Sole

Variable 3 or 4 becoming southerly or southwesterly 4 or 5, occasionally 6 in west. Moderate, becoming rough later in northwest. Fair. Good.

Shannon

Variable 4 becoming south or southeast 5 to 7. Moderate or rough, becoming rough or very rough later in west. Rain or drizzle. Good, occasionally poor.

Rockall

Variable 4 becoming south or southeast 5 to 7. Moderate or rough, becoming rough or very rough later in west. Rain or drizzle. Good, occasionally poor.

Bailey

Northwest 4 or 5 becoming variable 3, then east 5 to 7 later, perhaps gale 8 later. Moderate or rough. Rain later. Good, occasionally moderate later.

Faeroes

Northwest 6 to gale 8 becoming variable 4. Rough or very rough, becoming moderate later. Showers. Mainly good.

Southeast Iceland

Variable 4 at first in west, otherwise northwesterly veering northeasterly 5 or 6. Moderate or rough. Wintry showers. Good, occasionally poor.

East Northern Section

In north

Variable 3 or 4 becoming easterly or northeasterly 5 to 7. Moderate or rough. Fair then wintry showers. Good, occasionally poor later.

In south

Easterly or southeasterly becoming cyclonic, 5 to 7, occasionally gale 8 in north. Moderate or rough, becoming very rough. Rain. Moderate or poor.

West Northern Section

In north

Northerly or northeasterly 5 or 6, occasionally 7 in south, but mainly 3 or 4 at first in northeast. Moderate becoming rough. Snow showers later in far north, otherwise fair. Good, but occasionally very poor later in far north. Light icing at times in far northwest.

In south

Easterly or northeasterly 6 to gale 8, occasionally severe gale 9 in west, but mainly cyclonic 4 or 5 in far south. Rough or very rough. Rain, with fog patches in far south. Moderate or poor, occasionally very poor in far south.

East Central Section

Southerly or southwesterly, but cyclonic for a time in far northwest, 5 to 7, occasionally gale 8 in northwest. Moderate at first in far east, otherwise rough or very rough. Rain or showers. Moderate or good, occasionally poor.

West Central Section

In southeast

Southwesterly 6 to gale 8, occasionally severe gale 9 at first in north, then backing southerly 4 or 5, increasing 6 at times later. Very rough becoming rough. Rain, drizzle or showers. Moderate or poor, occasionally good.

In southwest

Westerly or southwesterly 4 or 5, becoming cyclonic 6 to gale 8, occasionally severe gale 9 later. Rough or very rough, becoming very rough or high later. Rain or thundery showers. Moderate or poor, occasionally good at first.

In northeast

Cyclonic 6 to gale 8, occasionally severe gale 9 at first in south, but mainly 4 or 5 in far north, becoming variable mainly 3 or 4 later. Rough or very rough, becoming rough. Rain or showers, fog patches. Moderate or good, occasionally very poor.

In northwest

Variable 3 or 4 until later except in far northwest, otherwise northeasterly 4 or 5. Very rough in far northwest, otherwise rough. Rain or showers, fog patches. Moderate or good, occasionally very poor.

Denmark Strait

Variable 3 or 4 at first in south, otherwise northerly or northeasterly 5 to 7, occasionally gale 8 later. Moderate or rough, occasionally very rough later in far west. Snow or snow showers. Moderate or good, occasionally very poor. Light or moderate icing at times, except in southeast and far south, with temperatures generally ms02 to ms05, but ms06 to ms08 in far northeast.

North Iceland

In north

Northerly 5 or 6 increasing 7 to severe gale 9, then becoming cyclonic later. Rough or very rough, becoming very rough or high later in west. Snow or snow showers. Moderate or good, occasionally very poor. Light or moderate icing except in southeast, with temperatures generally ms02 to ms05, but becoming severe for a time in west, with temperatures ms05 to ms08.

In south

Northerly 4 or 5, increasing 6 at times. Very rough at first in far southeast, otherwise moderate or rough. Sleet, snow or snow showers. Moderate or good, occasionally very poor. Light or moderate icing developing in northwest, with temperatures ms02 to ms05.

Norwegian Basin

In area to the west of 06 east

Northerly 5 to 7, occasionally gale 8 at first in south, then decreasing 4 at times later. Rough or very rough becoming moderate or rough. Wintry showers. Moderate or good, occasionally poor.

In area to the east of 06 east

Northeasterly 4 or 5, occasionally 6 in west, becoming variable 3 at times in east. Rough becoming moderate. Rain, sleet or wintry showers. Moderate or good, occasionally poor.

Outlook for following 24 hours

Severe gales expected in West Central Section, Denmark Strait and north Iceland, with a risk of storms in the east of Denmark Strait. Gales expected in Bailey, East Northern Section and West Northern Section. Risk of gales in Rockall and East Central Section.

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.

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