Met Office: Eryri: forecast wind

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Sefyllfa cyffredinol Dydd Llun

A dry day, with some hazy sunshine likely to develop and with only light winds, after some mist, fog and low cloud around for a time in the morning.

Peryglon	Risgiau	Eglurhad
Stormydd eira	No Risk
Eira trwm	No Risk
Gwyntoedd nerth storom	No Risk
Tymhestloedd	No Risk
Effaith oeri difrifol	No Risk
Niwl hirbarhaol ac eang dros y bryniau	Low	Patchy fog and low cloud forming overnight may be slow to clear.
Stormydd o daranau	No Risk
Glaw trwm di-baid	No Risk

Peryglon

Risgiau

Eglurhad

Stormydd eira

No Risk

Eira trwm

No Risk

Gwyntoedd nerth storom

No Risk

Tymhestloedd

No Risk

Effaith oeri difrifol

No Risk

Niwl hirbarhaol ac eang dros y bryniau

Low

Patchy fog and low cloud forming overnight may be slow to clear.

Stormydd o daranau

No Risk

Glaw trwm di-baid

No Risk

Crynodeb a thebygolrwydd gwlybaniaeth Dydd Llun
O'r Wawr hyd 0900	0900 hyd 1200	1200 hyd 1500	1500 hyd Machlud
Fog	Sunny intervals	Sunny intervals	Cloudy
0%	0%	0%	0%

Crynodeb a thebygolrwydd gwlybaniaeth Dydd Llun

O'r Wawr hyd 0900

0900 hyd 1200

1200 hyd 1500

1500 hyd Machlud

Fog

Sunny intervals

Cloudy

Rhagolygon y tywydd manwl ar gyfer y mynyddoedd: Eryri

Dydd Llun
Dydd Mawrth
Rhagolygon

Dydd Llun

Tywydd

Valley mist, fog and low cloud are likely to be quite widespread at first and this is likely to be quite slow to lift, and may persist into the afternoon in places, mainly in the east of the area. A dry day generally then, with some spells of hazy sunshine in places, before more general cloud spreads over from the west later in the afternoon.

Gwelededd

Poor or very poor at first, with fog patches, this most likely at low levels early in the day, with the fog slowly lifting into low cloud, and breaking up to a large extent allowing visibility to improve to mostly good or very good.

Niwl dros y bryniau

Valley fog lifting into occasional patches around 100 to 400 metres for a time mid to late morning, and then mostly clearing by the afternoon.

Gwyntoedd uchaf uwch ben 500m

Southwest 20 to 25 mph by dusk in the west.

Tymheredd

Dyffrynnoedd	Zero Celsius, rising to an early afternoon maximum of Plus 8 Celsius.
900 m	Plus 3 Celsius.
Lefel rhewi	Above the peaks.

Dydd Mawrth

Tywydd

Cloudy, dull and very misty, with rain or drizzle through the morning and into the early afternoon but probably then dying out.

Gwelededd

Poor or very poor, becoming moderate or good during the afternoon. Hill fog.

Niwl dros y bryniau

Extensive above 200 to 300 metres.

Gwyntoedd uchaf uwch ben 500m

South or south west 30 mph, later northwest 25 mph.

Tymheredd

Dyffrynnoedd	Plus 5 Celsius, rising to Plus 8 Celsius.
900 m	Plus 3 Celsius.
Lefel rhewi	Above the peaks.

Rhagolygon

Dydd Mercher

A grey rather damp misty morning, with low cloud covering much of the higher ground. Becoming dry and brighter, with the low cloud lifting for the afternoon, but thickening cloud may later bring rain to some western parts around dusk. Light, variable winds but freshening from the southeast later.

Dydd Iau

Sunny intervals and showers, some of which could be heavy in the south and west of the area, and then with more prolonged rain likely to spread from the southwest around dusk. Moderate to fresh south or southwest winds becoming strong to gale south to southeast later.

Dydd Gwener

Perhaps a dry start but cloudy generally, with rain spreading across the whole area and becoming heavy. The rain will be accompanied by an increasing south to southwest wind which is likely to reach gale or even severe gale force later in the day, along with extensive hill fog.