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Weather Forecasts

Today
High
9°
Low
5°
60%
F3
Tomorrow
High
7°
Low
4°
5%
F4
Sun, 15 Feb
High
10°
Low
6°
65%
F6
Mon, 16 Feb
High
9°
Low
6°
45%
F6
Tue, 17 Feb
High
11°
Low
7°
30%
F3
Wed, 18 Feb
High
11°
Low
8°
45%
F4
Thu, 19 Feb
High
9°
Low
5°
45%
F4
Morning
Sunrise 07:25
Max
9°
60%
F3
Cloudy with rain or the odd shower likely. Wind southwest to south light F2 or 3.
UV 2
Afternoon
Sunset 17:26
Max
9°
65%
F2
Rather cloudy with showers likely. Wind variable light F2, becoming north to northeast light F3.
UV 2
Night
Waning Crescent
Min
5°
75%
F5
Rather cloudy with occasional showers, perhaps heavy at times. Wind north to northeast light F3 to moderate F4, increasing fresh F5 to strong F6, perhaps occasionally strong F7.

Shipping Forecast

General Situation
At 18:00UTC low, 982mb, Ireland, expected to move southeast, losing its identity by midday Friday, with a ridge expected to extend northeast towards Britain by Saturday.

Forecast from 00:00UTC Friday to 00:00UTC Saturday.
Wind
West to southwest 4 to 5, soon decreasing 3 to 4, becoming cyclonic 2 to 3 by midday and north to northeast 3 to 5 towards dusk, increasing 5 to 7 later.
Sea State
Rather rough to rough, soon decreasing slight with a low to moderate swell, increasing moderate to rather rough later.
Weather
Showers, perhaps locally heavy, risk of hail later. Risk of mist patches near the French coast for a time at first.
Visibility
Good, occasionally moderate, perhaps locally poor.
Outlook from 00:00UTC Saturday to 00:00UTC Sunday.
Wind
North to northeast 6 to 7, decreasing 5 to 6 by dawn, further decreasing 3 to 4 by midday, becoming variable 1 to 3 in the afternoon and south 4 to 6 in the evening.
Sea State
Moderate to rather rough, occasionally rough in the north and west at first, decreasing slight with a low swell in the afternoon, occasionally moderate mid-Channel later.
Weather
Showers, perhaps heavy with hail, clearing by dawn.
Visibility
Good, occasionally moderate or poor at first.

Understanding the Forecast

The wind speed is given in the Beaufort Scale on an 8 point compass with a variability of +-45°. Terms commonly used in association with the wind and other parts of the forecast include:

Veering - a change of wind in the clockwise sense (up to 180°)
Backing – a change of wind in the anticlockwise sense (up to 180°)
At first – within the first 12 hours
Later – within the latter 12 hours
Occasional/occasionally – lasts less than half the time (location or time specific)
At times – non-persistent (lasts more than half the forecast period)
For a time – a transient state

Waves or sea state is the forecast of the mean of the largest 7% of combined wind and swell waves. Wind waves are locally produced waves; swell waves are produced by distant strong winds. Sea state descriptions equate to the following wave heights:

Description

Height

Smooth

< 0.5m

Slight

0.5 - 1.25m

Moderate

1.25 - 2.5m

Rough

2.5 - 4.0m

Very Rough

4.0 - 6.0m

High

6.0 - 9.0m

Very High

9.0 - 14.0m

Phenomenal

> 14m

Visibility measurements equate to the following distances in nautical miles and kilometers:

Description

Distance N.Mi

Distance Km

Good

> 5 n.mi

> 10 km

Moderate

2 - 5 n.mi

3.7 - 9 km

Poor

0.6 - 2 n.mi

1.0 - 3.7 km

Very Poor

< 0.6 n.mi

< 1000 m

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