Includes all summits in the the northern half of Wales from Plynlimon northwards.
Snowdonia National Park
Wednesday 23rd September 2020
Last updated
Tuesday 22nd September 2020 at
4:20 PM
In Scotland, many places dry, but a few showers moving around slowly, of snow on higher summits. Chilly, but winds light. A complex front drifts east across England & Wales - rain may well largely clear, but risk of showers following, may cluster together.
Cool. A few showers. Wind mostly light.
Variable, may be mostly northerly, 10 to 20mph, perhaps 25mph after dawn.
Mostly small, sometimes blustery. Notable wind chill where exposed on tops.
Occasional hail showers
Overnight rain soon clears southeastwards around dawn. Then often dry, but expect scattered showers, with hail sometimes to low levels, possible snow flurries above 1000m.
Breaking toward higher slopes
Fairly extensive cloud from dawn, becoming gradually confined to higher slopes, although patches may linger on high tops, briefly returning below 600m around showers.
30% rising to 60%
Lengthy amounts of sunshine, but obscured at times by banks of cloud at various heights. Visibility excellent.
4C
Above the summits.
Snowdonia National Park
Thursday 24th September 2020
Last updated
Tuesday 22nd September 2020 at
4:20 PM
Some uncertainty: Variable or southwesterly, 15 to 25mph, occasional lulls, but risk 30-40mph for periods.
Occasionally small, but risk often blustery and significant wind chill on higher areas, sometimes arduous conditions.
Frequent heavy rain
Pulses of heavy rain are expected to rotate in from the southwest across Wales through the day. Some sustained heavy bursts. Risk of hail and thunder, snow on very highest tops. Intermittently dry east Wales.
Extensive in rain
Likely covering higher summits most or all day. If rain persists, cloud shrouding hills more extensively, but away from rain, breaks occasionally toward higher tops.
40%
Mostly cloudy, any sun weak through layers of high cloud. Visibility very good away from rain, but poor if rain sets in.
3C.
Only just above Snowdon summit.
Snowdonia National Park
Friday 25th September 2020
Last updated
Tuesday 22nd September 2020 at
4:20 PM
North to northwesterly, 20 to often 30mph, may reach 40 perhaps 50mph for a time Snowdon range.
Considerable buffeting at times on higher terrain, in places arduous conditions; significant wind chill.
Occasional showers, hail
Showers spreading inland from the north, risk locally frequent over a few hours, whilst nearby stays often dry. Hail, or sometimes snow on highest summits in Snowdon range.
Mostly higher tops
Cloud bases varied, but covering higher summits in Snowdon range perhaps for several hours above 800m, and patches below 600m during showers. Inland and toward mid-Wales often breaking to most tops.
60%
Frequent bursts of bright sunshine. The air quite clear, although slight haze coastal mountains.
2 or 3C.
Just above highest summits.
Generally chilly into the weekend with higher mountains near or just below freezing point, and overnight frost in many valleys, notable early-season low temperatures Highland glens. A complex low pivots eastwards on Thursday - rain focused across England, Wales & southern Scotland. Strong northerly winds follow on Friday with scattered hail showers, snow on the Munros. Pressure builds by Saturday leading to largely dry conditions and very clear air. Early next week, westerly winds are expected to return, with rain at times, low cloud and varied temperatures.