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yellow Warnings have been issued for the United Kingdom

Brecon Beacons

Weather hazards over 300m on Mon 30 Nov 2015

High risk

Considerable buffeting from gusts exceeding 50mph for a large part of the day.
Heavy persistent rain
Rain looks to be persistent and heavy at times throughout.

Medium risk

Storm force winds
Gusts may reach 65-75 mph. Dangerous conditions on exposed peaks and ridges.
Severe chill effect
Strong winds and heavy rain combining to give a significant chill effect.
Persistent extensive hill fog
Broken cloud bases above 400-600 metres leading to some navigational difficulties.

Low risk

No low risks

No risk

Heavy snow
Strong sunlight

Mon 30 Nov 2015

Early rain is likely to persist for much of the day, and through the afternoon is likely to become heavy, leading to flooded water courses and some extremely difficult underfoot conditions with extensive hill fog likely as well. Becoming very windy once more with gales, and possible storm force winds over peaks.

0600 to 0900 0900 to 1200 1200 to 1500 1500 to 1800 1800 to 2100 2100 to 2400
Heavy rain Heavy rain Heavy rain Heavy rain Light rain Light rain
Precipitation probability
50-70% >90% >90% >90% >90% >90%


Moderate to poor for much of the day. Very poor in hill fog.

Hill Fog

Broken bases 400 to 600 meters.

Max wind above 400m

Southwesterly 40-50 mph, increasing to 50 to 70 mph over peaks by midday.


Plus 2 Celsius rising to plus 7 Celsius.
Plus 1 rising to plus 3 Celsius.
Freezing level:
Close to the summits for a time at first, then rising.

Recent Rainfall

Neuadd Rain (near Pontsticill)
353 m
Rainfall measured at:
0300 on Mon 30 Nov 2015
Last 24 hours:
19.8 mm
Last 48 hours:
33.6 mm
Last 72 hours:
42.4 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.

Tue 01 Dec 2015

Milder but and staying windy with outbreaks of rain and drizzle through the day, especially over western slopes, though not as heavy and persistent as Monday. The best of any drier interludes will be in the east.


Moderate to poor for much of the day. Very poor in hill fog

Hill Fog

Broken to blanket hill fog above 400-500m

Max wind above 400m

Southwesterly 40-50mph


Plus 7 becoming 12 Celsius
Plus 7 Celsius
Freezing level:
Well above summits

Wed 02 Dec 2015

Windy with gales likely on exposed slopes and peaks. Further rain by mid morning, heavy at times, perhaps becoming lighter and more intermittent by late evening. Hill fog will be extensive and persistent. Freezing levels will be above the summits.

Thu 03 Dec 2015

Some uncertainty for Thursday, though it looks as if a band of rain will affect the area through the day, winds may become strong for a time before the rain clears to the east introducing much colder conditions across the region. Freezing levels may fall below summits as the rain clears.

Fri 04 Dec 2015

There may be a brief spell of quieter weather on Friday morning before winds increase once more towards gale force ahead of a weather system pushing in from the Atlantic, raising freezing levels in bringing some persistent rain in across the country by the end of the day.

Issued at: 0341 on Mon 30 Nov 2015