Pen Y Fan (Powys) weather

Headline:

Increasingly wet and windy on Saturday.

Today:

A drier, brighter and warmer day for most with sunny spells, these most prevalent in the east. Rain at times across Anglesey and rain edging into other western regions later, heavy at times. Winds gradually easing. Maximum temperature 21 °C.

Tonight:

Remaining cloudy, with outbreaks of rain and drizzle turning more widespread overnight, perhaps heavy at times. Breezy at times along coasts. Feeling humid. Minimum temperature 15 °C.

Saturday:

Becoming increasingly windy, with strong winds and coastal gales possible, especially later. Cloudy with outbreaks of rain, perhaps heavy at times, giving localised flooding and travel disruption. Maximum temperature 18 °C.

Outlook for Sunday to Tuesday:

Sunny intervals with scattered showers on Sunday. Strong winds gradually easing, but feeling considerably cooler. Much drier from Monday, with plenty of sunny spells, though the odd shower still possible.

It will be fairly settled to start the period but there will be spells or rain or showers in south and eastern areas, near to an area of low pressure. Elsewhere, some fog and frost patches are possible at times. It will also turn colder, as a northerly flow becomes established for a time. Later in the week, more widely drier and settled conditions could develop as high pressure becomes more influential, although probably still with some coastal showers. There may however be some thicker cloud and outbreaks of rain in the far northwest at times. Temperatures should gradually return closer to average in this period. Later there may be a return to a more changeable pattern but this is uncertain.

Confidence is very low in the weather regimes most likely to affect the UK during this period. On balance, there will likely be a transition from slow-moving weather patterns to a more changeable period at some stage although the timing on this is highly uncertain. High pressure probably close to the UK, which would offer some occasional periods of dry weather, will likely give way to a more unsettled period with some short lived dry interludes during this time. Temperatures will likely fluctuate either side of, but often close to, average.