Met Office: Brecon Beacons: forecast pressure

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Overview for Saturday

Cloudy with spells of rain and drizzle, extensive hill fog and breezy conditions.

Hazards	Risk	Explanation
Blizzards	No Risk
Heavy snow	No Risk
Storm force winds	No Risk
Gales	Low	Low risk of gusts reaching 50 mph over the highest peaks and ridges.
Severe chill effect	No Risk
Persistent and extensive hill fog	High	Hill fog above 300 metres this morning, gradually lifting to 400-500 metres this afternoon.
Thunderstorms	No Risk
Heavy persistent rain	Low	Low risk of 2 hours of continuous heavy rain, more likely shorter spells of heavy rain will occur.

Hazards

Risk

Explanation

Blizzards

No Risk

Heavy snow

No Risk

Storm force winds

No Risk

Gales

Low

Low risk of gusts reaching 50 mph over the highest peaks and ridges.

Severe chill effect

No Risk

Persistent and extensive hill fog

High

Hill fog above 300 metres this morning, gradually lifting to 400-500 metres this afternoon.

Thunderstorms

No Risk

Heavy persistent rain

Low

Low risk of 2 hours of continuous heavy rain, more likely shorter spells of heavy rain will occur.

Weather summary and probability of precipitation for Saturday
Dawn to 0900	0900 to 1200	1200 to 1500	1500 to dusk
Light rain	Light rain	Light rain	Light rain
90%	90%	90%	80%

Weather summary and probability of precipitation for Saturday

Dawn to 0900

0900 to 1200

1200 to 1500

1500 to dusk

Light rain

90%

80%

Detailed mountain weather forecast: Brecon Beacons

Saturday
Sunday
Outlook

Saturday

Weather

Overcast with spells of rain and drizzle, the rain mainly light but some heavier bursts are possible, especially this morning. Extensive hill fog will persist all day, generally about 400 metres this morning and 500 metres this afternoon. However throughout today patches of hill fog as low as 200 metres are likely across the south of the Park.

Visibility

Moderate or good, but rapidly decreasing poor when rain or drizzle starts. Very poor with hill fog.

Hill fog

Extensive hill fog above 400 metres will persist this morning, lifting to generally 500 metres this afternoon. However areas of hill fog may occur down to 200 metres across the south of the Park at any time today.

Maximum winds above 400m

Southwest veering north late this afternoon, 25-30mph with gusts 40-50mph.

Temperature

Valleys	Plus 10 Celsius.
800 m	Plus 6 Celsius at first, falling to plus 4 Celsius in the afternoon.
Freezing level	Above summits.

Sunday

Weather

Dry throughout. Starting with a few fog patches in the valleys, but these will clear by mid morning as patches of hill fog also disperse. Then fine and bright through the rest of the day with light winds and cloud above the Peaks.

Visibility

Good or very good, after starting locally very poor with low level fog and also hill fog.

Hill fog

Occasional patches around 300 metres at first, clearing by mid morning. Then nil.

Maximum winds above 400m

Northwest 10 to 15 mph becoming southwesterly 30- 40mph, gusts possibly to 50 mph by dusk.

Temperature

Valleys	Plus 5 Celsius increasing to plus 7 Celsius.
800 m	Plus 2 Celsius
Freezing level	Above summits.

Outlook

Monday

Wet and windy weather will arrive through the morning, with strong south or southwest winds gusting to around gale force at times. Rain is likely to become heavy and persistent and there is likely to be extensive hill fog.

Tuesday

A respite from the unsettled weather likely on Tuesday, with clear and dry conditions expected. It will breezy, with a low risk of gale force gusts at the summits.

Wednesday

A return to the wet and windy weather on Wednesday, with occasional rain spreading from the west, possibly becoming heavier and more persistent by the end of the day. It will become windy too with gales likely around the summits.