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yellow Warnings have been issued for the United Kingdom

Brecon Beacons

Weather hazards over 300m on Tue 28 Feb 2017

High risk

Gales
Winds will reach up to 50 mph later today.
Severe chill effect
Strong winds and cold temperatures will bring a significant wind chill, especially at height.

Medium risk

Heavy snow
Some snow showers may be heavy at times.

Low risk

Blizzards
Low risk of blizzard conditions later today as the wind increases, with any prolonged snow showers.
Thunderstorms
Low risk of thunder in heavier showers.

No risk

Storm force winds
none
Persistent extensive hill fog
none
Heavy persistent rain
none
Strong sunlight
none

Tue 28 Feb 2017

Scattered wintry showers, falling as sleet or snow, with snowfall possible down to low levels at times, especially at first this morning. Accumulations of up to 5cm are possible over the highest peaks. Some showers may be heavy, with a low risk of thunder, chiefly early afternoon. Becoming windy this afternoon and evening, with strong gusts in or near showers. Showers will gradually become lighter this evening.

Time
0600 to 0900 0900 to 1200 1200 to 1500 1500 to 1800 1800 to 2100 2100 to 2400
Weather
Cloudy Cloudy Sleet shower day Heavy shower day Heavy shower night Heavy shower night
Precipitation probability
20% 30% 80% 80% 70% 50%

Visibility

Mainly very good, but poor or very poor showers.

Hill Fog

Areas of hill fog above 500 metres, mainly in showers.

Max wind above 400m

West 20 mph, increasing this afternoon to 50 mph by evening.

Temperature

Valleys:
Zero Celsius becoming plus 6 Celsius.
800m:
Minus 3 Celsius becoming Zero Celsius.
Freezing level:
400 metres, gradually rising to 800 metres by evening.

Recent Rainfall

Location:
Neuadd Rain (near Pontsticill)
Altitude:
353 m
Rainfall measured at:
0300 on Tue 28 Feb 2017
Last 24 hours:
11.8 mm
Last 48 hours:
23.0 mm
Last 72 hours:
42.0 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.

Wed 01 Mar 2017

Becoming dry by sunrise with some clear spells developing. After sunrise cloud will increase, with outbreaks of rain spreading from the south by late morning, perhaps wintry turning over the highest peaks, but with no accumulations expected. Outbreaks of rain, perhaps heavy at times, will continue through the afternoon. As the rain clears north during the evening drier conditions will follow, as winds increase to become strong and gusty over the peaks. Becoming dry but cold overnight.

Visibility

Mainly very good, but moderate in any light wintry showers in the morning, and in rain in the afternoon and evening.

Hill Fog

Nil significant initially, but areas of hill fog above 400 metres will accompany and then follow the rain.

Max wind above 400m

West or southwesterly, 40-50 mph initially decreasing 20-30 mph for a time, then increasing to 50-60 mph in the evening.

Temperature

Valleys:
Plus 2 Celsius becoming plus 8 Celsius.
800m:
Minus 1 Celsius.
Freezing level:
700 metres.

Thu 02 Mar 2017

Isolated showers and clear or sunny spells for most of the day, but heavy rain may arrive later. Staying very windy, with gusts to 60 mph over the highest peaks at first, then only easing a little through the day. This will lead to a significant windchill, especially at first. Freezing level will gradually rise close to or just above the highest peaks.

Fri 03 Mar 2017

Cloudy with showers or longer spells of rain, perhaps heavy at times. Lighter winds than on Thursday, and with the freezing level around the highest peaks.

Sat 04 Mar 2017

A mix of scattered showers and bright or sunny spells throughout the day. Winds mainly light, but becoming gusty in or near showers, and perhaps turning breezier later in the day. Freezing level around the highest peaks.

Issued at: 0331 on Tue 28 Feb 2017