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High Seas forecast

Issued at 0800 UTC on Monday 24 July 2017
by the Met Office, Exeter, United Kingdom
for the period 0800 UTC Monday 24 July until 0800 UTC Tuesday 25 July 2017

General synopsis

At 240000UTC, low 56 north 55 west 989 expected 57 north 45 west 1001 by 250000UTC. New low expected 47 north 39 west 1006 by same time. Developing low near 75 north 19 west expected 77 north 05 east 1012 by that time. at 240000UTC, high 41 north 22 west 1032 expected 38 north 27 west 1032 by 250000UTC. New high expected 68 north 11 west 1024 by same time. Low 56 north 04 east 1009 losing its identity. High 70 north 35 west 1022 dissipating

Area forecasts for the next 24 hours

Sole

West or northwest 4 or 5. Slight or moderate. Rain later in west, fair in east. Good, occasionally poor later in west.

Shannon

Northwest backing southwest 3 or 4, increasing 5 at times. Slight or moderate. Rain later, fog patches. Moderate or good, occasionally very poor.

Rockall

Northwest backing southwest, then southeast later, 3 or 4, increasing 5 at times. Slight or moderate. Rain later, fog patches. Moderate or good, occasionally very poor.

Bailey

Variable 3 becoming southeast 4. Slight. Fair. Good, occasionally poor.

Faeroes

In east, northerly 3 or 4, occasionally 5 at first. in west, variable 3. In east, slight or moderate. in west, slight. In east, fair. in west, fog patches. In east, moderate or good. in west, moderate, occasionally very poor.

Southeast Iceland

Variable 3. Slight. Fog patches. Moderate, occasionally very poor.

East Northern Section

Southerly or southeasterly, becoming cyclonic later in southwest, 4 or 5, occasionally 6 later in north. Slight or moderate in north and east, moderate throughout in south and west. Rain or drizzle, fog banks, but mainly fair in northeast. Moderate or poor, occasionally very poor, but moderate or good in northeast.

West Northern Section

In north

Easterly or northeasterly, veering southeasterly in east, 4 or 5, increasing 6 to gale 8 in far northwest. Moderate, occasionally rough in northwest. Rain, drizzle or thundery showers, fog banks. Moderate or poor, occasionally very poor.

In south

Variable or cyclonic 3 or 4, increasing 5 at times. Moderate. Rain or thundery showers, fog patches. Moderate or good, occasionally very poor.

East Central Section

In north

Southerly or southwesterly, becoming variable later, 3 or 4. Moderate. Rain, drizzle or thundery showers, fog banks. Moderate or poor, occasionally very poor.

In south

Southwesterly 4 or 5, increasing 6 or 7 later in west. Moderate or rough in west, moderate throughout in east. Rain, drizzle, thundery showers and fog patches in north and west, mainly fair in south and east. Moderate or good, occasionally very poor in north and west.

West Central Section

Southwesterly backing southerly 4 or 5, occasionally 6 at first, then becoming cyclonic 6 to gale 8 later in south. Moderate or rough in south, moderate throughout in north. Rain, drizzle or thundery showers, fog banks. Moderate or poor, occasionally very poor, but becoming good at times in west and north.

Denmark Strait

In area to south of 67 north

Southeasterly 4 or 5 in east, but westerly or northwesterly 5 increasing 6 to gale 8 in west. Slight or moderate in east, moderate becoming rough in west. Occasional drizzle, then rain in west, fog banks. Moderate or poor, occasionally very poor.

In area to north of 67 north

Variable 3 or 4. Slight. Fog patches. Moderate or good, occasionally very poor.

North Iceland

Variable 3 or 4. Slight. Drizzle and fog banks except in northwest. Moderate or good, occasionally very poor except in northwest.

Norwegian Basin

In west

Northerly 4 or 5. Slight or moderate. Showers. Moderate or good, occasionally poor.

In east

Cyclonic 4 or 5, occasionally 6 at first in north, then decreasing 3. Slight or moderate, becoming slight. Thundery showers, fog patches. Moderate or good, occasionally very poor.

Outlook for following 24 hours

Storms expected in East Central Section. Severe gales expected in East Northern Section. Gales expected in Denmark Strait. Gales also expected later in Shannon and Rockall.

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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