Black Mountain (Fan Brycheiniog and Fan Foel) from Glyntawe walk

Met Office Forecast

Wales

Cold and showery, with some brighter spells possible.

Today:

A windy day with bright spells and some showers likely throughout. These showers could fall as snow over higher ground, with hail possible at times. Feeling cold, especially in the wind. Maximum Temperature 7C.

Tonight:

Any showers will continue into the evening, but the majority of the night will be clear which will lead to a dip in temperatures with ice and frost patches forming. Minimum Temperature 0C.

Wednesday:

A potentially icy start, with clear skies through the morning. During the afternoon, cloud will thicken bringing a few showers, especially over the hills. Remaining breezy and still feeling chilly. Maximum Temperature 9C.

Outlook for Thursday to Saturday:

Breezy throughout and often cloudy with occasional spells of rain at times. Gradually turning milder.

Day 6-7 and Week 2:

Often windy with outbreaks of rain and showers for all areas at the start of this period, with temperatures on the mild side of the seasonal average. As we head through the first full week of February it currently looks most likely that we will see a gradual trend towards more settled conditions, particularly in the south, and there is a chance that these will extend across the whole country at times. Overnight fog and frosts are likely to accompany these more settled conditions, with light winds and temperatures probably nearer to the average for the time of year. The far north, and particularly north-west, will probably remain more changeable, or unsettled, with further spells of wind and rain.

Week 3 and 4:

The first part of the period is likely to trend to more anticyclonic conditions, with the associated drier and more settled weather intially in the southeast, spreading northwestwards and beginning to dominate. The north will continue to be at risk from outbreaks of rain and stronger winds at times. Overnight frosts and fog will be likely, which could be persistent at times. Temperatures around normal, and sometimes a little above. There could be large variations between night time and day time temperatures in the more settled spells, especially on the sunnier days.

Met Office : Wales : 2020-01-28T02:41:17

Daylight : Brecon Beacons NP

Data: US Navy Observatory

Moonlight : Brecon Beacons NP

Notes

• The moon's phase or fracillum (percentage of the moon illuminated) doesn't vary much with location.
• A full moon is not just bigger, its much brighter. A half moon ('50%') give less than 5% of the illumination of a full moon. You can walk with a half moon if its high in the sky (after dusk for a growing moon, before dawn for a shrinking moon).
• Sky glow (light reflected by air or clouds) from nearby cities, and especially snow on the ground also effect light levels.
• Times will vary a few minutes, as (i) these figures are for the centre of the county the walk is in, and, (ii) if there are hills on the horizon.
• Of course, you need a cloudless night as well!
• Data: US Navy Observatory

Met Office Mountain Forecast

Issued: 0600 on 2020-01-28 for Brecon Beacons

Data: Met Office