Includes all summits in the the northern half of Wales from Plynlimon northwards.
Snowdonia National Park
Wednesday 3rd March 2021
Last updated
Tuesday 2nd March 2021 at
3:50 PM
Most mountains remain clear and sunny above an inversion, whilst low level cloud or fog will thin only slowly in some areas, focused toward the east, leaving low level haze. Very little wind overall. In south Wales, risk localised bursts of rain occurring.
Little wind. Areas of low cloud/fog and mostly weak sun.
Direction varying, little wind; 5mph or less.
Negligible.
Mostly dry, risk isolated patches of rain.
Risk of isolated patches of rain moving from the south.
Banks at varying heights likely to clear
Some banks of low cloud and fog at varying heights from dawn, tending to break up to leave ragged patches. High tops may be clear, and many hills may generally clear.
40% rising to 80%
Mostly cloudy, but some hazy sun possibly breaking through at times. Visibility suppressed lower down by fog or low level haze. May well be excellent on high tops.
4C
Above the summits.
Snowdonia National Park
Thursday 4th March 2021
Last updated
Tuesday 2nd March 2021 at
3:50 PM
Northeasterly, 10 to 20mph, tending to strengthen later.
Fairly small, but toward dusk likely to bring marked wind chill.
Little or no precipitation
Chance of an isolated light shower, mainly later in the day, turning to snow above 600m.
Varied, some breaks
May vary: from dawn, banks of cloud at various levels over the hills, with some breaks forming mostly toward west coast. Cloud may come and go on higher slopes, rarely below 600-700m by middle of day onward.
40%
Patches of sun, best toward west. Visibility very good.
3C, but likely falling toward 0 or -1C through daytime.
Starting above the summits, but by late afternoon likely to lower toward 800m.
Snowdonia National Park
Friday 5th March 2021
Last updated
Tuesday 2nd March 2021 at
3:50 PM
Easterly 20 to 25mph, speeds likely to lessen through day.
A distinct chill in exposure for at least part of the day.
Precipitation not expected
Little if any
Rare patches some higher slopes.
80%
Frequently sunny. Excellent visibility.
-4C rising slowly to -2C.
Frost into most valleys at dawn; rising toward 700m by afternoon.
High pressure will dominate through to the weekend and substantially dry conditions prevail. Much colder air arrives from the north for a few days - dropping several degrees below freezing on higher mountains. Also notably harder frosts in most glens and valleys late this week. Gradual changes are likely over the weekend, becoming generally unsettled next week as westerly winds return, with precipitation then becoming frequent again. Temperatures are likely to vary next week, but perhaps often chilly with some upland snowfalls likely; periods of gales returning.