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yellow Warnings have been issued for the United Kingdom

Brecon Beacons

Weather hazards over 300m on Sun 07 Feb 2016

High risk

Gales
Gusts to around 60mph over the summits.
Severe chill effect
Risk of hypothermia unless adequately equipped and protected.
Persistent extensive hill fog
Broken bases to around 400 metres, especially later in the day.

Medium risk

Storm force winds
Gusts to around 60mph over the summits, possibly increasing to 80mph in the evening.
Thunderstorms
Heavy showers with hail could give lightning, mainly Monday morning.
Heavy persistent rain
Spell of rain could be persistent and heavy later on Monday afternoon.

Low risk

No low risks
none

No risk

Blizzards
none
Heavy snow
none
Strong sunlight
none

Sun 07 Feb 2016

A very windy day at all levels with clear spells and heavy showers, which could be frequent and heavy, with hail and a risk of lightning. Showers will also fall as snow on higher peaks. Showers continuing into daylight hours, before merging into longer spells of rain around mid-afternoon, with snow across higher peaks. Rain and snow clearing to heavy, possibly thundery, wintry showers just before midnight.

Time
0000 to 0300 0300 to 0600 0600 to 0900 0900 to 1200 1200 to 1500 1500 to 1800 1800 to 2100 2100 to 2400
Weather
Heavy shower night Hail shower night Hail shower day Heavy shower day Heavy shower day Heavy rain Heavy rain Thunder shower night
Precipitation probability
70-90% 60% 60% 50-70% 50-70% 70-90% 70-90% 70-90%

Visibility

Good, becoming moderate in rain, poor in heavy rain and snow and very poor in hill fog.

Hill Fog

Broken bases to around 400 metres at times, mainly in rain during the afternoon and evening.

Max wind above 400m

Southwesterly with gusts 60 mph, possibly increasing to 80 mph during the evening.

Temperature

Valleys:
Plus 6 Celsius.
800m:
Zero Celsius becoming Plus 3 Celsius later in evening.
Freezing level:
800 metres.

Recent Rainfall

Location:
Neuadd Rain (near Pontsticill)
Altitude:
353 m
Rainfall measured at:
1500 on Sat 6 Feb 2016
Last 24 hours:
38.0 mm
Last 48 hours:
38.8 mm
Last 72 hours:
44.4 mm

Rainfall data provided by the Environment Agency. The Met Office is not responsible for content provided by third parties and may remove this data without warning.

Mon 08 Feb 2016

Another unsettled day on Monday. This will give further squally showers, wintry at higher levels and accompanied with hail and a risk of lightning. Remaining extremely windy with gusts to around 70mph.

Visibility

Generally good or very good, falling moderate in rain or showers, poor in snow and heavy showers, and very poor in hill fog.

Hill Fog

Broken bases to around 400 metres, mainly in showers.

Max wind above 400m

Westerly or southwesterly with gusts 70mph.

Temperature

Valleys:
Plus 6 Celsius.
800m:
Plus 1 Celsius.
Freezing level:
Around 800 metres.

Tue 09 Feb 2016

Windy at first on Tuesday, with winds gradually decreasing through the day. Further heavy, squally, wintry showers are likely, especially during the morning, then becoming lighter and more isolated by the afternoon. Freezing level around 700 metres.

Wed 10 Feb 2016

Any remaining morning showers dying away with sunny spells developing. Through the late afternoon and early evening, cloud will begin to increase once again from the southwest, with possible rain and snow arriving towards midnight. Freezing level around 700 metres.

Thu 11 Feb 2016

Considerable uncertainty due to unknown track of a developing Atlantic depression. Current indications are for a strengthening southerly or southwesterly wind, with rain then showers. Staying on the cold side with wintry precipitation across higher peaks and a freezing level around 800 metres, probably falling later in the day.

Issued at: 1533 on Sat 06 Feb 2016