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Weather Forecasts

Today
High
19°
Low
15°
15%
F4
Tomorrow
High
20°
Low
16°
35%
F5
Sun, 20 Sep
High
20°
Low
13°
55%
F4
Mon, 21 Sep
High
21°
Low
13°
0%
F2
Tue, 22 Sep
High
22°
Low
13°
0%
F2
Wed, 23 Sep
High
23°
Low
14°
0%
F3
Thu, 24 Sep
High
24°
Low
15°
0%
F3
Morning
Sunrise 05:51
Max
19°
15%
F4
Sunny periods but often cloudier. Wind northwest moderate F4, backing westerly, occasionally fresh F5 later.
UV 4
Afternoon
Sunset 18:20
Max
19°
15%
F5
Brighter spells, becoming cloudy. Wind west to southwest moderate F4, increasing fresh F5.
UV 4
Night
First Quarter
Min
15°
25%
F5
Some clear spells but mainly cloudy with the chance of a little patchy rain towards dawn. Wind southwest moderate F4 to fresh F5.

Shipping Forecast

General Situation
At 18:00UTC low 980mb, 300 miles north of Scotland, expected 992mb,north Baltic by Saturday.

19.1°C
Sea Temperature

Forecast from 00:00UTC Friday to 00:00UTC Saturday.
Wind
West to northwest 4 to 5, decreasing 3 to 4 by dawn, backing west to southwest by afternoon and increasing 4 to 5, perhaps locally 6 mid Channel by midnight.
Sea State
Slight to moderate with a low swell, locally rather rough in the north later.
Weather
Isolated showers.
Visibility
Good except in showers.
Outlook from 00:00UTC Saturday to 00:00UTC Sunday.
Wind
West to southwest 4 to 5, perhaps locally 6 Alderney and north.
Sea State
Slight to moderate, with a low swell, locally rather rough in the north.
Weather
Some light rain or drizzle. Risk of mist patches on Saturday morning.
Visibility
Good, perhaps locally moderate to poor Saturday morning.

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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