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Bridge bunting
Bridge bunting Picture by Peter Frankland
Today
High
14°
Low
13°
10%
F4
Tomorrow
High
14°
Low
12°
95%
F5
Tue, 11 Nov
High
14°
Low
13°
30%
F5
Wed, 12 Nov
High
15°
Low
14°
60%
F5
Thu, 13 Nov
High
16°
Low
13°
55%
F5
Fri, 14 Nov
High
15°
Low
13°
40%
F4
Sat, 15 Nov
High
14°
Low
13°
40%
F5
Morning, Today
High
14°
Hazy sunshine, becoming cloudier later.
10%
1
UV
F4
South moderate F4, increasing fresh F5.
Sunrise 07:12
Afternoon
High
14°
Cloudy with patchy rain likely from late afternoon.
65%
1
UV
F5
South moderate F4 to fresh F5, with gusts to 35mph, increasing strong F6 in Alderney.
Sunset 16:38
Night
Low
13°
Cloudy with showers or longer spells of rain, heavy at first, clearing to isolated showers after midnight.
100%
F5
South fresh F5 to strong F6, with gusts to 40mph, perhaps briefly strong F7 in Alderney, decreasing moderate F4 later.
Waning Gibbous

Shipping Forecast

General Situation
At 18:00UTC low, 988mb, mid-Atlantic, slow-moving with little change expected. New low, expected 977mb, just west of Shannon by midday Tuesday. Associated fronts affecting the area at times.

14.1°C
Sea Temperature

Forecast from 00:00UTC Monday to 00:00UTC Tuesday.
Wind
South to southwest 5 to 6, decreasing 4 to 5 by dawn, perhaps locally 6 with gusts to 40kt with thundery showers, veering southwest to west 4 to 6 around midday, perhaps locally 7 mid-Channel until dusk.
Sea State
Slight to moderate in the southeast, with a low to moderate swell, rather rough occasionally rough in the north and west.
Weather
Rain or showers, occasionally heavy and thundery until evening, becoming isolated later.
Visibility
Good, occasionally moderate to poor.
Outlook from 00:00UTC Tuesday to 00:00UTC Wednesday.
Wind
Southwest 4 to 5, backing south 5 to 6 by dawn, then south to southeast by dusk, occasionally 7 mid-Channel later.
Sea State
Slight to moderate in the southeast, with a low to moderate swell, rather rough in the north and west, increasing rough mid-Channel later.
Weather
Isolated showers dying out by morning, occasional rain in the far west later.
Visibility
Good, 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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