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Weather Forecasts

Today
High
10°
Low
5°
30%
F4
Tomorrow
High
12°
Low
9°
25%
F4
Mon, 16 Mar
High
12°
Low
9°
55%
F5
Tue, 17 Mar
High
13°
Low
9°
5%
F4
Wed, 18 Mar
High
15°
Low
9°
0%
F4
Thu, 19 Mar
High
13°
Low
8°
0%
F4
Fri, 20 Mar
High
13°
Low
8°
0%
F4
Morning
Sunrise 06:27
Max
10°
30%
F4
Occasional showers, heavy with hail at times, clearing around dawn. Then sunny spells and just the chance of a shower. Wind northwest moderate F4, occasionally fresh F5 and gusty until dawn, decreasing light F3 later.
UV 3
Afternoon
Sunset 18:14
Max
10°
15%
F3
Sunny periods. Wind northwest light F3, occasionally light F2 later.
UV 3
Night
Waning Crescent
Min
5°
40%
F3
Clear spells, becoming cloudier for a time with the chance of showers. Wind northwest light F2 to 3, backing southwest light F3.

Shipping Forecast

General Situation
At 18:00UTC low 967mb, northeast of Iceland, slow-moving, expected 982mb by midday Saturday, losing its identity by midday Sunday. New low, expected 962mb, south of Iceland by same time.

10.6°C
Sea Temperature

Forecast from 00:00UTC Saturday to 00:00UTC Sunday.
Wind
West 4 to 5, with gust to 35kt near showers, veering northwest by dawn, decreasing 3 to 4 by late morning and 2 to 3 by dusk.
Sea State
Rather rough to rough, gradually decreasing slight to moderate with a moderate swell by dawn, decreasing smooth or slight with a low swell later.
Weather
Occasional showers, locally heavy with a risk of hail, becoming isolated by mid-morning.
Visibility
Good, occasionally moderate.
Outlook from 00:00UTC Sunday to 00:00UTC Monday.
Wind
Northwest 2 to 3, backing southwest 3 to 4 overnight, increasing 4 to 5, locally 6 in the north, by midday, veering west 5 to 6 later, perhaps 7 mid-channel.
Sea State
Smooth or slight with a low swell, increasing rather rough to rough later.
Weather
Patchy rain and drizzle spreading eastwards, then showers later.
Visibility
Good, occasionally moderate, perhaps poor for a time.

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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