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Brecon Beacons

Weather hazards over 300m on Tue 23 Sep 2014

High risk

No high risks
none

Medium risk

Strong sunlight
Sunny spells giving a medium risk of sun burn.

Low risk

No low risks
none

No risk

Blizzards
none
Heavy snow
none
Storm force winds
none
Gales
none
Severe chill effect
none
Persistent extensive hill fog
none
Thunderstorms
none
Heavy persistent rain
none

Tue 23 Sep 2014

It will be a cold start with a grass frost possible in sheltered locations. There will also likely be some patchy valley mist and fog, which will quickly lift. A generally dry day will follow, with plenty of sunny spells making it feel pleasantly warm when walking. However, cloud will increase from the north towards the evening. The cloud will also bring some outbreaks of rain, mainly across northern slopes.

Time
0600 to 0900 0900 to 1200 1200 to 1500 1500 to 1800 1800 to 2100 2100 to 2400
Weather
Sunny intervals Sunny intervals Sunny intervals Sunny intervals Partly cloudy night Partly cloudy night
Precipitation probability
10% 10% 10% 10% 30% 30%

Visibility

Generally excellent, moderate in any rain, poor in mist and very poor in fog and hill fog.

Hill Fog

Valley mist and fog lifting to give some patches above 200 metres at first. Otherwise nil for most of the day, until the evening, when there will be occasional patches above 400 metres.

Max wind above 400m

Southwesterly 30mph.

Temperature

Valleys:
Plus 3 Celsius, increasing to plus 19 Celsius.
800m:
Plus 9 Celsius.
Freezing level:
Above the summits.

Recent Rainfall

Location:
Neuadd Rain (near Pontsticill)
Altitude:
353 m
Rainfall measured at:
0300 on Tue 23 Sep 2014
Last 24 hours:
0.2 mm
Last 48 hours:
0.2 mm
Last 72 hours:
0.4 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: 0354 on Tue 23 Sep 2014

Wed 24 Sep 2014

Patchy rain will clear southeastwards through the morning. Cloud will then gradually lift and break through the day to bring some sunny spells, mainly through the afternoon. It will again feel pleasantly warm when walking in the sunshine, but it will be quite breezy in exposure.

Visibility

Generally good or very good.

Hill Fog

Cloud bases as low as 400m through the morning, lifting into the afternoon to clear the summits.

Max wind above 400m

Westerly 35mph.

Temperature

Valleys:
Plus 8 Celsius, increasing to plus 17 Celsius.
800m:
Plus 9 Celsius.
Freezing level:
Above the summits.

Issued at: 0354 on Tue 23 Sep 2014

Thu 25 Sep 2014

A breezy day with strong winds possible over the highest peaks. Generally cloudy with the odd brighter spell possible. However, the cloud will be thick enough at times to bring some patchy light rain or drizzle. Mild.

Issued at: 0354 on Tue 23 Sep 2014

Fri 26 Sep 2014

Very similar to Thursday, a breezy and generally cloudy day with the odd bright spell. There remains the risk of some patchy rain at times, particularly on western slopes. Mild.

Issued at: 0354 on Tue 23 Sep 2014

Sat 27 Sep 2014

Cloudy with some patchy light rain or drizzle at first, but becoming drier and brighter later. Winds will ease too. Remaining mild and feeling warm on any sunny spells.

Issued at: 0354 on Tue 23 Sep 2014