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yellow Warnings have been issued for the United Kingdom

Brecon Beacons

Weather hazards over 300m on Sat 28 Feb 2015

High risk

Gales
Gales over the summits during the early hours, widespread gales to lower levels from lunchtime.
Persistent extensive hill fog
Widespread hill fog above 500m, occasionally down as low as 200m, particularly in the west.

Medium risk

Severe chill effect
Very strong winds will make it feel close to minus 6 Celsius.
Heavy persistent rain
Patchy outbreaks of rain/drizzle becoming heavier and more persistent later in the day.

Low risk

Storm force winds
Becoming very windy later, with gusts 60-70 mph possible over the highest summits.

No risk

Blizzards
none
Heavy snow
none
Thunderstorms
none
Strong sunlight
none

Sat 28 Feb 2015

It is going to be windy at first with some outbreaks of rain and drizzle. Through the morning the winds should ease a little, but it will remain rather cloudy with hill fog and further rain or drizzle at times. During the afternoon the rain is set to turn heavy and more persistent, with some snow possible over the summits at first. The winds will also strengthen reaching storm force in exposed parts.

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
Light rain Cloudy Cloudy Cloudy Cloudy Cloudy Heavy rain Cloudy
Precipitation probability
30% 20% 20% 10% 10% 30% 80% 30%

Visibility

Moderate, perhaps glimpses of good in the morning, especially in the east. Turning poor in strong winds, rain, and sleet during the afternoon and very poor to near zero in hill fog.

Hill Fog

Widespread hill fog above 500m, occasionally down as low as 200m, particularly in the west.

Max wind above 400m

Southwesterly 30-35mph, with gusts 50mph at first, easing to southwesterly 25mph with gusts 40mph by midday, but increasing to southwesterly 35mph with gusts 65-70mph by dusk.

Temperature

Valleys:
Plus 3 Celsius, increasing plus 6 Celsius.
800m:
Plus 2 Celsius.
Freezing level:
Around the summits at first, rising just above during the afternoon.

Recent Rainfall

Location:
Neuadd Rain (near Pontsticill)
Altitude:
353 m
Rainfall measured at:
1500 on Fri 27 Feb 2015
Last 24 hours:
0.0 mm
Last 48 hours:
11.8 mm
Last 72 hours:
18.4 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.

Issued at: 1535 on Fri 27 Feb 2015

Sun 01 Mar 2015

Very windy through the first half the day with winds becoming slightly less strong during the afternoon. Some heavy showers, often wintry, especially over high ground, with a few bright or sunny spells in between. Feeling very cold in exposure.

Visibility

Generally good or very good but reduced greatly in any showers or hill fog.

Hill Fog

Isolated patches around the summits.

Max wind above 400m

Southwest becoming southwesterly meaning 40 mph with gusts 70 -80 mph. Gradually easing through the day.

Temperature

Valleys:
Plus 2 Celsius.
800m:
Minus 2 Celsius.
Freezing level:
Around 600m.

Issued at: 1535 on Fri 27 Feb 2015

Mon 02 Mar 2015

Limited bright or sunny intervals with further wintry showers, heavy at times. Windy, with gales likely, especially over the summits, making it feel very cold and bringing the risk of drifting snow. Freezing level falling to around 200 metres.

Issued at: 1535 on Fri 27 Feb 2015

Tue 03 Mar 2015

Remaining very cold with gale force westerly winds, and frequent wintry showers. Snow remaining likely above 300m, although showers will gradually ease. Freezing level 300m.

Issued at: 1535 on Fri 27 Feb 2015

Wed 04 Mar 2015

Winds becoming lighter and turning milder. A few showers but mostly dry with more in the way of bright or sunny spells compared to previous days. Freezing level around the summits.

Issued at: 1535 on Fri 27 Feb 2015