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Brecon Beacons

Weather hazards over 300m on Sun 19 Apr 2015

High risk

No high risks
none

Medium risk

No medium risks
none

Low risk

Persistent extensive hill fog
Broken cloud on eastern facing slopes base 500 metres until 1000hrs.

No risk

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

Sun 19 Apr 2015

A dry and increasingly cloudy morning is expected, with a chance of light showers by late morning. Perhaps a little brightness developing in places for the afternoon, with a risk of some mostly light showers. Feeling very cold in the brisk winds. Hill fog patches over some eastern facing slopes until mid-morning.

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 Cloudy Cloudy Cloudy Cloudy Sunny intervals Sunny intervals Partly cloudy night
Precipitation probability
0% 0% 0% 30% 20% 40% 40% 50%

Visibility

Good becoming moderate in any showers and very poor in hill fog patches until mid-morning.

Hill Fog

Broken hill fog patches above 500 metres affecting some eastern facing slopes until mid-morning.

Max wind above 400m

Easterly or northeasterly 25 mph gust 35 mph during the early hours of Sunday morning.

Temperature

Valleys:
Plus 4 Celsius rising to Plus 11 Celsius.
800m:
Minus 2 Celsius rising to Plus 2 Celsius.
Freezing level:
600 metres until mid-morning then rising above.

Recent Rainfall

Location:
Neuadd Rain (near Pontsticill)
Altitude:
353 m
Rainfall measured at:
1500 on Sat 18 Apr 2015
Last 24 hours:
0.0 mm
Last 48 hours:
0.0 mm
Last 72 hours:
0.0 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.

Issued at: 1635 on Sat 18 Apr 2015

Mon 20 Apr 2015

A dry day is expected with variable amounts of cloud during the morning, and some hill fog patches. Hill fog clearing quickly to give a dry afternoon with some long sunny spells. Winds a little lighter than Sunday.

Visibility

Good, but poor or very poor at first in hill fog.

Hill Fog

Over eastern facing slopes scattered or broken bases above 500 metres lifting and breaking by 1000hrs.

Max wind above 400m

Easterly or northeasterly 10 to 15mph with gusts 25mph.

Temperature

Valleys:
Zero Celsius becoming plus 10 Celsius
800m:
Plus 1 Celsius rising to Plus 7 Celsius.
Freezing level:
Near summits around dawn then rising well above.

Issued at: 1635 on Sat 18 Apr 2015

Tue 21 Apr 2015

Another fine and dry day with some long sunny spells, once any early hill fog has cleared early in the morning. Winds a little stronger with gusts 25mph.

Issued at: 1635 on Sat 18 Apr 2015

Wed 22 Apr 2015

A rather cloudier start to the day with more widespread hill fog above 400 metres. Cloud and hill fog lifting and breaking during the morning. Easterly winds reaching 40-45mph gusts by late afternoon.

Issued at: 1635 on Sat 18 Apr 2015

Thu 23 Apr 2015

Another dry day is expected with some long sunny spells. Feeling quite cool across summits in brisk easterly winds, but rather warmer al lower elevations by the afternoon.

Issued at: 1635 on Sat 18 Apr 2015