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Llyn Y Fan Fawr

Llyn Y Fan Fawr last 24 hours
  • 6°C 3°C
    Heavy rain
  • 6°C 0°C
    Heavy rain
  • 2°C -3°C
    Heavy snow shower day
  • 3°C -1°C
    Light snow shower day
  • 4°C -1°C
    Sleet
  • 4°C 0°C
    Sleet shower day
  • 4°C -1°C
    Light snow
Saturday   (25 February 2017)
0200 0300 0400 0500 0600 0700 0800 0900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300
Heavy shower night Heavy shower night Mist Light rain Fog Light rain Light rain Heavy rain Heavy rain Heavy rain Heavy rain Heavy rain Heavy rain Heavy rain Heavy rain Heavy rain Heavy rain Heavy rain Heavy shower night Heavy rain Heavy rain Fog
Temperature (°C)
4 4 4 4 4 4 5 4 5 5 5 5 5 5 6 6 6 6 6 6 7 6
Feels like temperature (°C) arrow down
-3 -3 -3 -3 -3 -2 -2 -2 -2 -2 -2 -2 -1 -1 -1 0 0 0 1 1 1 1
Precipitation probability arrow down
70% 70% 30% 60% 30% 50% 60% 80% 90% 90% 90% 90% 90% 90% ≥95% 90% 90% 90% 70% 90% 80% 30%
Wind direction, speed & gust (mph) arrow down
SW 29 36 SW 31 39 SW 33 41 SW 32 41 SW 32 42 SW 32 42 SW 33 43 SW 34 44 SW 34 44 SW 34 45 SW 34 45 SW 34 45 SW 34 45 SW 33 44 SW 33 43 SW 31 41 SW 30 40 SW 29 38 SW 28 38 SW 28 38 WSW 26 34 WSW 24 31
Visibility (E = Excellent, VG = Very Good, G = Good, M = Moderate, P = Poor, VP = Very Poor) arrow down
M M P VP VP VP VP VP VP VP VP VP VP VP VP VP VP VP M VP VP VP
Humidity arrow down
100% 100% 100% 100% 100% 99% 99% 99% 99% 99% 99% 99% 99% 99% 99% 100% 100% 100% 99% 100% 99% 99%
UV index arrow down
0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0
Sunday   (26 February 2017)
0000 0100 0200 0300 0400 0500 0600 0700 0800 0900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300
Mist Mist Fog Cloudy Cloudy Cloudy Overcast Mist Overcast Mist Overcast Drizzle Drizzle Drizzle Heavy rain Heavy rain Heavy rain Heavy rain Heavy rain Heavy rain Light shower night Drizzle Drizzle Light snow shower night
Temperature (°C)
5 4 4 3 3 3 3 3 4 4 4 5 5 5 5 5 5 5 5 4 4 3 3 2
Feels like temperature (°C) arrow down
0 -1 -2 -3 -3 -3 -3 -3 -3 -2 -2 -2 -2 -2 -2 -2 -1 -1 -2 -2 -3 -3 -4 -4
Precipitation probability arrow down
20% 20% 20% 10% 10% 10% 20% 20% 20% 30% 20% 40% 40% 40% 80% 90% 90% 90% 80% 80% 40% 40% 40% 40%
Wind direction, speed & gust (mph) arrow down
WSW 24 31 WSW 23 30 WSW 22 29 WSW 22 29 WSW 22 30 SW 24 32 SW 24 33 SW 27 35 SW 28 37 SW 29 39 SW 31 43 SW 33 45 SW 36 49 SSW 38 51 SSW 37 51 SSW 41 55 SW 40 54 SW 36 49 SW 32 45 WSW 30 41 WSW 27 38 WSW 24 34 WSW 23 32 SW 22 31
Visibility (E = Excellent, VG = Very Good, G = Good, M = Moderate, P = Poor, VP = Very Poor) arrow down
P P VP M VG G M P M P M VP VP VP VP VP VP VP G G VG G G VG
Humidity arrow down
99% 99% 99% 97% 95% 97% 98% 98% 98% 98% 97% 97% 97% 97% 97% 98% 98% 98% 98% 97% 97% 96% 96% 94%
UV index arrow down
0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0
Monday   (27 February 2017)
0000 0300 0600 0900 1200 1500 1800 2100
Light snow shower night Light snow shower night Heavy snow shower night Heavy snow shower day Heavy snow shower day Heavy snow shower day Heavy snow shower night Light snow
Temperature (°C)
2 1 1 0 1 0 0 -1
Feels like temperature (°C) arrow down
-5 -5 -6 -6 -5 -6 -6 -7
Precipitation probability arrow down
50% 50% 70% 70% 70% 70% 60% 60%
Wind direction, speed & gust (mph) arrow down
SW 22 30 SW 21 29 SW 21 32 SSW 20 32 SW 17 31 SW 18 31 SW 16 27 SW 16 26
Visibility (E = Excellent, VG = Very Good, G = Good, M = Moderate, P = Poor, VP = Very Poor) arrow down
VG G M M M M M G
Humidity arrow down
95% 93% 95% 95% 91% 87% 92% 93%
UV index arrow down
0 0 0 1 1 1 0 0
Tuesday   (28 February 2017)
0000 0300 0600 0900 1200 1500 1800 2100
Light snow Light snow Light snow Light snow shower day Sunny intervals Light snow shower day Heavy snow shower night Light snow shower night
Temperature (°C)
-1 -2 -2 -1 1 2 1 1
Feels like temperature (°C) arrow down
-7 -8 -8 -7 -5 -4 -5 -6
Precipitation probability arrow down
50% 50% 50% 40% 20% 40% 70% 40%
Wind direction, speed & gust (mph) arrow down
SW 14 21 SW 12 18 W 14 21 WNW 18 28 W 20 36 W 23 40 W 25 40 W 23 37
Visibility (E = Excellent, VG = Very Good, G = Good, M = Moderate, P = Poor, VP = Very Poor) arrow down
G G G G G G VG VG
Humidity arrow down
94% 96% 97% 93% 83% 80% 84% 86%
UV index arrow down
0 0 0 1 2 1 0 0
Wednesday   (01 March 2017)
0000 0300 0600 0900 1200 1500 1800 2100
Light snow shower night Light snow Light snow shower night Light snow shower day Cloudy Light shower day Partly cloudy night Heavy snow shower night
Temperature (°C)
0 0 0 1 3 3 2 1
Feels like temperature (°C) arrow down
-6 -6 -6 -4 -2 -2 -4 -5
Precipitation probability arrow down
40% 60% 40% 40% 20% 40% 20% 60%
Wind direction, speed & gust (mph) arrow down
W 22 35 W 20 31 WSW 18 28 SW 17 27 SW 18 32 SW 19 34 SW 19 31 WSW 22 34
Visibility (E = Excellent, VG = Very Good, G = Good, M = Moderate, P = Poor, VP = Very Poor) arrow down
VG VG G G G G G G
Humidity arrow down
90% 93% 93% 92% 81% 77% 85% 87%
UV index arrow down
0 0 0 1 1 1 0 0
Thursday   (02 March 2017)
0000 0300 0600 0900 1200 1500 1800 2100
Light snow shower night Light snow shower night Light snow shower night Light snow shower day Sunny intervals Heavy shower day Thunder shower night Light snow
Temperature (°C)
1 0 0 1 3 3 2 1
Feels like temperature (°C) arrow down
-6 -6 -6 -5 -2 -3 -4 -5
Precipitation probability arrow down
50% 50% 40% 40% 20% 60% 60% 60%
Wind direction, speed & gust (mph) arrow down
WSW 23 37 WSW 23 36 SW 23 36 SW 23 36 SW 22 39 SW 21 36 SW 20 33 SW 20 32
Visibility (E = Excellent, VG = Very Good, G = Good, M = Moderate, P = Poor, VP = Very Poor) arrow down
G G G G G G G G
Humidity arrow down
88% 88% 89% 85% 77% 80% 88% 91%
UV index arrow down
0 0 0 1 1 1 0 0
Friday   (03 March 2017)
0000 0300 0600 0900 1200 1500 1800 2100
Heavy snow shower night Heavy snow shower night Heavy snow shower night Heavy snow Cloudy Cloudy Cloudy Cloudy
Temperature (°C)
1 0 0 1 3 3 3 2
Feels like temperature (°C) arrow down
-5 -5 -5 -4 -2 0 -1 -2
Precipitation probability arrow down
60% 60% 60% 60% 20% 20% 20% 20%
Wind direction, speed & gust (mph) arrow down
SW 20 31 SSW 18 28 SSW 17 26 SW 18 29 SW 19 33 WSW 11 24 WSW 10 21 SSW 9 19
Visibility (E = Excellent, VG = Very Good, G = Good, M = Moderate, P = Poor, VP = Very Poor) arrow down
G G G G G G G G
Humidity arrow down
92% 94% 95% 91% 81% 91% 95% 96%
UV index arrow down
0 0 0 1 1 1 0 0
More Detail chevron down

Issued at: 0100 on Sat 25 Feb 2017

Forecast summary

Regional forecast for Wales

Wet and windy

Today:

It will be a cloudy and breezy start to the day, with persistent rain spreading from the west. Some heavier outbreaks are expected, mainly over hills, where we will see some mist and fog. It will remain breezy, but mild. Maximum Temperature 11 °C.

Tonight:

Remaining cloudy and damp with areas of hill fog. Most of the rain will clear in the early hours when clearer spells will develop, feeling chillier by dawn. Minimum Temperature 5 °C.

Sunday:

A mostly dry start with some brighter spells further east. Becoming cloudier and quite breezy with rain spreading from the west, making for a wet afternoon for Wales. Maximum Temperature 12 °C.

Outlook for Monday to Wednesday:

Sunny spells and heavy, blustery showers are expected, some turning thundery with snow over hills at times. Feeling colder by day with some overnight frosts. Outbreaks of rain on Wednesday.

Updated at: 0144 on Sat 25 Feb 2017

UK forecast for the next 5 days

Cloudy with strong winds and rain

Today:

Rain will affect many northern areas at first, pushing further south through the day. Windy in parts of the north with a risk of local flooding in north west England. Becoming brighter further north in the afternoon.

Tonight:

A cold night with scattered showers in Scotland and Northern Ireland. Milder and cloudier further south with rain clearing England and Wales overnight, but more rain approaching from the north-west.

Sunday:

A dry and bright start for mainland UK; becoming generally cloudier and windy with rain spreading from the west. Persistent rain and gales along western exposed areas; east remaining dry.

Outlook for Monday to Wednesday:

Sunny spells and heavy blustery showers are widely expected, some turning thundery with snow over hills. Feeling much colder, especially in the north with overnight frosts, but milder further south.

Updated at: 0137 on Sat 25 Feb 2017

Outlook for the UK over the next 6-30 days

UK Outlook for Wednesday 1 Mar 2017 to Friday 10 Mar 2017:

An unsettled picture is likely at the start of March, as further weather systems affect the UK from the Atlantic. Frontal systems will cross the UK, bringing cloudy and wet weather at times, with some snow over northern hills. It will be rather cold at times in the north, with temperatures closer to average in the south. The changeable Atlantic influence is expected to remain in place through early March, with strong winds and rain at times and possibly gales. Temperatures will be around normal, and possibly a little above average in the south. In between frontal systems, there is likely to be some spells of drier and brighter weather with some showers and patchy overnight frosts.

Updated at: 1221 on Fri 24 Feb 2017

UK Outlook for Saturday 11 Mar 2017 to Saturday 25 Mar 2017:

For the rest of March signals are weak and confidence is low. It will probably be rather unsettled with spells of wet and windy weather at first, interspersed with brighter and showery conditions with some snow possible across the north of the UK. There should, however, also be some drier and brighter spells, where we may see some local frost and fog at times overnight. Temperatures are expected to be slightly above normal for the time of year. However, there remains the possibility of seeing a more prolonged cold spell, with an increased chance of snow in places. This is more likely later in the period.

Updated at: 1219 on Fri 24 Feb 2017