Met Office: Brecon Beacons: forecast pressure

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Overview for Monday

A dry day, with some hazy sunshine likely and with only light winds, but with some mist, fog and low cloud around for a time, especially in the morning.

Hazards	Risk	Explanation
Blizzards	No Risk
Heavy snow	No Risk
Storm force winds	No Risk
Gales	No Risk
Severe chill effect	No Risk
Persistent and extensive hill fog	Low	Fog and low cloud forming overnight may take much of the morning to clear.
Thunderstorms	No Risk
Heavy persistent rain	No Risk

Hazards

Risk

Explanation

Blizzards

No Risk

Heavy snow

No Risk

Storm force winds

No Risk

Gales

No Risk

Severe chill effect

No Risk

Persistent and extensive hill fog

Low

Fog and low cloud forming overnight may take much of the morning to clear.

Thunderstorms

No Risk

Heavy persistent rain

No Risk

Weather summary and probability of precipitation for Monday
Dawn to 0900	0900 to 1200	1200 to 1500	1500 to dusk
Fog	Sunny intervals	Sunny	Cloudy
0%	0%	0%	0%

Weather summary and probability of precipitation for Monday

Dawn to 0900

0900 to 1200

1200 to 1500

1500 to dusk

Fog

Sunny intervals

Sunny

Cloudy

Detailed mountain weather forecast: Brecon Beacons

Monday
Tuesday
Outlook

Monday

Weather

Mist, fog and low cloud will be quite widespread at first and this is likely to be very slow to lift and may persist into the afternoon in some parts, especially in the north and east of the area. A dry day generally then, with some spells of hazy sunshine in places before more general cloud spreads over from the west towards dusk.

Visibility

Poor or very poor at first, with fog patches, this most likely at low levels early in the day, with the fog slowly lifting into low cloud and breaking up to a large extent allowing visibility to improve to mostly good or very good.

Hill fog

Valley fog lifting into occasional patches around 100 to 400 metres for a time mid to late morning, and then mostly clearing by the afternoon.

Maximum winds above 400m

Southwest 20 mph towards dusk in the west.

Temperature

Valleys	Zero Celsius, rising to an early afternoon maximum of Plus 8 Celsius.
800 m	Plus 3 Celsius.
Freezing level	Above the peaks.

Tuesday

Weather

Cloudy, dull and very misty with rain or drizzle through the morning and into the afternoon but probably dying out later in the day.

Visibility

Poor or very poor, becoming mainly moderate in the afternoon.

Hill fog

Extensive above 200 to 300 metres.

Maximum winds above 400m

South or south west 20 mph.

Temperature

Valleys	Plus 5 Celsius rising to Plus 8 Celsius.
800 m	Plus 3 Celsius.
Freezing level	Above the peaks.

Outlook

Wednesday

A grey rather damp misty morning, with low cloud covering the higher peaks. Becoming dry and brighter with the low cloud lifting for the afternoon but thickening cloud may bring rain to some western parts towards dusk. Light winds freshening from the southeast later.

Thursday

Sunny intervals and showers, some of which could be heavy in the south and west of the area, and then with more prolonged rain likely to spread from the southwest around dusk. Moderate to fresh south or southwest winds becoming strong south to southeast later.

Friday

Perhaps a dry start but cloudy generally, with rain soon spreading across the whole area and heavy at times. The rain will be accompanied by an increasing south to southwest wind which is likely to reach gale force later in the day.