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Brecon Beacons

Weather hazards over 300m on Sun 05 Jul 2015

High risk

Thunderstorms
A high risk of thunderstorms associated with heavy showers.
Strong sunlight
A risk of exposure to high UV levels, especially in prolonged sunny spells.

Medium risk

No medium risks
none

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
Heavy persistent rain
none

Sun 05 Jul 2015

Clear spells overnight and a dry, bright start to the day. Showers will develop through the morning, which may be heavy and frequent with a risk of lightning and perhaps hail. These should become more isolated and not as heavy through the afternoon with plenty of sunny spells. Showers easing through the evening.

Time
0000 to 0300 0300 to 0600 0600 to 0900 0900 to 1200 1200 to 1500 1500 to 1800 1800 to 2100 2100 to 2400
Weather
Partly cloudy night Partly cloudy night Light shower day Heavy shower day Heavy shower day Sunny intervals Sunny intervals Partly cloudy night
Precipitation probability
0% 20% 60% 70% 60% 30% 30% 0%

Visibility

Generally good becoming very good or excellent from late afternoon. Moderate or poor in showers,

Hill Fog

Occasional patches of hill fog above 500 metres, largely associated with showers.

Max wind above 400m

Southerly 30 mph.

Temperature

Valleys:
Plus 12 Celsius rising to plus 21 Celsius
800m:
Plus 11 Celsius falling to plus 8 Celsius.
Freezing level:
Above the summits.

Recent Rainfall

Location:
Neuadd Rain (near Pontsticill)
Altitude:
353 m
Rainfall measured at:
1500 on Sat 04 Jul 2015
Last 24 hours:
0.4 mm
Last 48 hours:
0.6 mm
Last 72 hours:
1.0 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.

Mon 06 Jul 2015

A dry morning, although increasingly cloudy. Rain will arrive in the afternoon, persisting through the rest of the day and turning heavy at times with extensive hill fog. It will also become windy with a small risk of gales around exposed peaks and ridges.

Visibility

Generally good but moderate or poor in the rain.

Hill Fog

Occasional patches above 500 metres in the morning. Persistent, widespread hill fog arriving with the rain above 400 metres with periods down to 200 metres during the evening.

Max wind above 400m

Southwesterly 45 mph.

Temperature

Valleys:
Plus 10 Celsius rising to plus 17 Celsius.
800m:
Plus 9 Celsius rising to plus 12 Celsius.
Freezing level:
Above the summits.

Tue 07 Jul 2015

Cloudy with outbreaks of rain, heavy at times, and hill fog through the morning. Rain will turn more showery through the afternoon, giving a risk of thundery downpours. Breezy, especially around showers.

Wed 08 Jul 2015

There risk of scattered showers, although these lighter than Tuesday with plenty of dry, sunny spells. Windy, with a chance of gales around the summits.

Thu 09 Jul 2015

Variable cloud giving some bright spells, but also a risk of outbreaks of light rain with patchy hill fog. Fresh winds easing later in the day.

Issued at: 1717 on Sat 04 Jul 2015