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yellow Warnings have been issued for the United Kingdom

Brecon Beacons

Weather hazards over 300m on Thu 25 Aug 2016

High risk

No high risks
none

Medium risk

Persistent extensive hill fog
High humidity and occasional showery rain may lead to hill fog around 400 metres throughout.
Thunderstorms
There is a risk of thunderstorms, mainly during the evening.

Low risk

Strong sunlight
Moderate UV levels this afternoon.

No risk

Blizzards
none
Heavy snow
none
Storm force winds
none
Gales
none
Severe chill effect
none
Heavy persistent rain
none

Thu 25 Aug 2016

Cloudy for much of the day, with scattered showers making erratic progress through the area from the south. Later this afternoon showers may turn thundery and prolonged. Given light winds and high humidity, some hill fog is likely to persist on the lower slopes for much of the day.

Time
0600 to 0900 0900 to 1200 1200 to 1500 1500 to 1800 1800 to 2100 2100 to 2400
Weather
Cloudy Light shower day Heavy shower day Thunder shower day Light shower day Partly cloudy night
Precipitation probability
20% 30% 60% 60% 30% 10%

Visibility

Generally good, but moderate in showers. Poor in hill fog.

Hill Fog

Patches around 400m throughout given light winds, occasional showery rain and high humidity.

Max wind above 400m

Variable direction 15mph.

Temperature

Valleys:
Plus 13 becoming 21 Celsius.
800m:
Plus 15 Celsius.
Freezing level:
Well above the summits.

Recent Rainfall

Location:
Neuadd Rain (near Pontsticill)
Altitude:
353 m
Rainfall measured at:
0300 on Thu 25 Aug 2016
Last 24 hours:
1.4 mm
Last 48 hours:
1.6 mm
Last 72 hours:
5.2 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.

Fri 26 Aug 2016

A drier, brighter and fresher day, with early hill fog clearing to leave a dry day with plenty of warm sunny spells and light westerly winds.

Visibility

Good. Hill fog patches above 600 metres at first.

Hill Fog

well-broken around the highest summits at first.

Max wind above 400m

Westerly 10mph.

Temperature

Valleys:
Plus 10 becoming 20 Celsius.
800m:
Plus 11 Celsius
Freezing level:
Well above the summits.

Sat 27 Aug 2016

Cloudy with showers or longer periods of rain. There is a chance of some heavy downpours, with accompanying thunder. Feeling increasingly humid.

Sun 28 Aug 2016

Remaining unsettled, with some slow-moving, heavy and possibly thundery showers in light winds. Some decent dry spells are also possible in between, with a tendency towards improvement later.

Mon 29 Aug 2016

Probably an improved day, with some sunny spells and a few showers, with the northwesterly wind contributing to a fresher feel.

Issued at: 0525 on Thu 25 Aug 2016