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Weather Forecasts

Today
High
20°
Low
14°
20%
F2
Tomorrow
High
22°
Low
15°
20%
F3
Wed, 1 Jul
High
21°
Low
16°
5%
F3
Thu, 2 Jul
High
20°
Low
17°
25%
F3
Fri, 3 Jul
High
22°
Low
17°
10%
F3
Sat, 4 Jul
High
23°
Low
17°
0%
F3
Sun, 5 Jul
High
24°
Low
17°
0%
F3
Morning
Sunrise 04:07
Max
20°
20%
F2
Sunny periods, with the chance of a light shower at first. Wind west to northwest light F2 to 3.
UV 8
Afternoon
Sunset 20:21
Max
20°
5%
F2
Mainly sunny. Wind west to northwest light F2 to 3, perhaps becoming variable for a time.
UV 8
Night
Full
Min
14°
55%
F2
Cloudy with some patchy rain likely, mainly after midnight. Wind northwest light F1 or 2, becoming variable, then southwest later.

Shipping Forecast

General Situation
At 18:00UTC low 990mb, Rockall, expected 999mb, Norwegian Sea by Tuesday. Further low, 1004mb, mid-Atlantic, expected 1015mb, Malin by same time.

17.5°C
Sea Temperature

Forecast from 00:00UTC Monday to 00:00UTC Tuesday.
Wind
West to northwest 3 to 4, decreasing 2 to 3 by dawn, occasionally variable 1 to 2.
Sea State
Slight, decreasing smooth or slight by dawn, with a low swell throughout.
Weather
A risk of isolated showers Monday morning. Patchy rain in the far northwest later.
Visibility
Good or very good, perhaps locally moderate later.
Outlook from 00:00UTC Tuesday to 00:00UTC Wednesday.
Wind
West to northwest 2 to 3, occasionally variable 1 to 2, backing southwest by dawn, veering west to northwest 3 to 4 later.
Sea State
Smooth or slight, with a low swell, increasing slight locally moderate later.
Weather
Patchy rain at first, mainly in the northwest.
Visibility
Good or very good, perhaps locally moderate.

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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