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yellow Warnings have been issued for the United Kingdom

Brecon Beacons

Weather hazards over 300m on Tue 23 Dec 2014

High risk

Gales
West/southwesterly gales are likely throughout bringing significant buffeting.
Persistent extensive hill fog
Persistent above 400-500m.

Medium risk

Heavy persistent rain
Rain is expected to turn heavy and persistent overnight.

Low risk

Storm force winds
Gusts of 60-65 mph over themits during the middle of the day, perhaps reaching storm force.
Severe chill effect
Strong winds will give a chilly feel around the peaks, feeling around freezing.

No risk

Blizzards
none
Heavy snow
none
Thunderstorms
none
Strong sunlight
none

Tue 23 Dec 2014

It will stay cloudy, windy and mild throughout with patchy rain or drizzle at times. Gales are expected across peaks and ridges, which will make it feel chilly and lead to significant buffeting. Rain will turn more persistent and heavy during the evening. Extensive hill fog is expected all day.

Time
0600 to 0900 0900 to 1200 1200 to 1500 1500 to 1800 1800 to 2100 2100 to 2400
Weather
Drizzle Light rain Light rain Light rain Heavy rain Heavy rain
Precipitation probability
30% 40% 60% 60% 70% 90%

Visibility

Moderate, occasionally good but very poor in hill fog.

Hill Fog

Persistent above 400-500 metres for most of the day.

Max wind above 400m

Southwesterly 40-45 mph gusting 60 -65 mph.

Temperature

Valleys:
Plus 9 rising to 12 Celsius.
800m:
Plus 5 Celsius.
Freezing level:
Above the summits.

Recent Rainfall

Location:
Neuadd Rain (near Pontsticill)
Altitude:
353 m
Rainfall measured at:
0300 on Tue 23 Dec 2014
Last 24 hours:
10.2 mm
Last 48 hours:
12.0 mm
Last 72 hours:
12.0 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.

Issued at: 0208 on Tue 23 Dec 2014

Wed 24 Dec 2014

Heavy rain will clear during the early hours leaving a dry but fairly cloudy start. However, it should soon brighten up with plenty of sunshine during the day and clear spells lasting into the evening. Winds will be lighter but it will remain breezy, and it will feel colder than recently.

Visibility

Very poor at first in hill fog becoming very good.

Hill Fog

Persistent above around 500 metres during the early hours, soon becoming occasional above 800 metres. Broken cloud bases then mostly above the peaks during the day and into the evening.

Max wind above 400m

West-northwesterly 40 mph.

Temperature

Valleys:
Plus 5 rising to 9 Celsius.
800m:
Plus 0 Celsius.
Freezing level:
Above the summits then dropping to 800 metres after the rain clears.

Issued at: 0208 on Tue 23 Dec 2014

Thu 25 Dec 2014

A dry and fine day with light northwesterly winds and plenty of sunny spells, although feeling colder than of late. The freezing level will be around 900 metres.

Issued at: 0208 on Tue 23 Dec 2014

Fri 26 Dec 2014

A cold and frosty start then mostly dry through the morning but increasingly cloudy. Winds will strengthen in the afternoon with spells of rain spreading from the west. Fog is likely to envelop the hills later on, giving very poor visibility, and southwesterly gales are likely in the evening. The freezing level will be around 900 metres, rising above the summits as cloud and rain sweep in.

Issued at: 0208 on Tue 23 Dec 2014

Sat 27 Dec 2014

Overnight rain should clear to the east, leaving a day of scattered showers and sunny spells. The freezing level will drop to 800 metres so summit snow is possible from any showers. Westerly winds will strengthen but should stay below gale.

Issued at: 0208 on Tue 23 Dec 2014