Mountain weather
Eryri / Snowdonia
Confidence
High for the general conditions. Some uncertainty on the level to which snow may fall on Monday and Tuesday.
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This eveningSunrise:Sunset:
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Sat 14 NovSunrise:Sunset:
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Sun 15 NovSunrise:Sunset:
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Further outlook
This evening forecast
Feeling cold, with a few isolated showers in the west through the evening. Otherwise, partly cloudy in a gentle south to southwesterly wind.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
Severe Chill Effect
Gales
Poor Visibility
Mountain weather forecast
Mainly dry but largely cloudy in a moderate breeze, freshening through the day. Feeling cold.
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Time
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Time |
00:00
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03:00
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06:00
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09:00
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12:00
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15:00
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18:00
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21:00
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Weather
(at 800m)
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Weather symbols |  |
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 |
 |
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Chance of
precipitation (at 800m)
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Chance of precipitation |
20%
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10%
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10%
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10%
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20%
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10%
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10%
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10%
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Wind direction and speed
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Time
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Time |
00:00
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03:00
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06:00
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09:00
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12:00
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15:00
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18:00
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21:00
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|---|---|---|---|---|---|---|---|---|---|
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900m
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900m | S 20mph knots
S
20mph |
S 22mph knots
S
22mph |
S 22mph knots
S
22mph |
S 26mph knots
S
26mph |
S 34mph knots
S
34mph |
S 35mph knots
S
35mph |
S 38mph knots
S
38mph |
S 40mph knots
S
40mph |
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600m
|
600m | S 15mph knots
S
15mph |
S 15mph knots
S
15mph |
S 15mph knots
S
15mph |
S 18mph knots
S
18mph |
S 22mph knots
S
22mph |
S 24mph knots
S
24mph |
S 24mph knots
S
24mph |
S 26mph knots
S
26mph |
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300m
|
300m | S 10mph knots
S
10mph |
S 10mph knots
S
10mph |
S 9mph knots
S
9mph |
S 11mph knots
S
11mph |
S 16mph knots
S
16mph |
S 18mph knots
S
18mph |
S 16mph knots
S
16mph |
S 18mph knots
S
18mph |
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Valley
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Valley | S 11mph knots
S
11mph |
S 12mph knots
S
12mph |
S 9mph knots
S
9mph |
S 12mph knots
S
12mph |
S 15mph knots
S
15mph |
S 16mph knots
S
16mph |
S 15mph knots
S
15mph |
S 17mph knots
S
17mph |
Wind gust
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Time
|
Time |
00:00
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03:00
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06:00
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09:00
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12:00
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15:00
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18:00
|
21:00
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|---|---|---|---|---|---|---|---|---|---|
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900m
|
900m | 25mph | 27mph | 27mph | 33mph | 42mph | 44mph | 46mph | 50mph |
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600m
|
600m | 20mph | 22mph | 20mph | 25mph | 30mph | 33mph | 33mph | 36mph |
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300m
|
300m | 20mph | 21mph | 18mph | 23mph | 28mph | 31mph | 30mph | 34mph |
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Valley
|
Valley | 21mph | 23mph | 19mph | 24mph | 27mph | 29mph | 28mph | 32mph |
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Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
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900m
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900m | ||||||||
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600m
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600m | ||||||||
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300m
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300m | ||||||||
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Valley
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Valley | ||||||||
| Freezing Level | Freezing Level |
1000m
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800m
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900m
|
1100m
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1100m
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1100m
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1000m
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1000m
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Additional weather information
Meteorologist's view
Any showers over the summits are likely to be wintry in nature, but such showers should be very short lived. Strengthening winds from early afternoon onwards, particularly towards summits, will bring more difficult walking conditions with a risk of being blown off balance. Energy output significantly increased when walking into the wind. The combination of the strong winds and cold temperatures towards the summits will bring a significant wind chill.
Weather
Mostly cloudy with glimpses of sunshine through the day. Generally dry but a quickly moving isolated shower, falling as snow above 700 M, remains a small risk.
Chance of cloud-free hill tops
80%
Low cloud and visibility
Some patchy cloud above 800 M and poor or very poor visibility within any showers near summits, but good or excellent visibility in general.
Ground conditions
No recent ground conditions report available.
Mountain weather information
Weather
Patchy rain spreading east in the early hours, turning persistent and occasionally heavy from dawn, before clearing by late afternoon. Isolated showers in the evening, falling as snow above 600 M.
Chance of cloud-free hill tops
40% in the early hours but dropping to less than 10% by morning. 70% from the early evening onwards.
Maximum wind speed expected
Southerly 25 mph gusting 30 mph in the morning, becoming to 30 mph gusting 35 mph by evening.
Temperature
- At 800m Plus 4 Celsius falling to Zero Celsius by late evening.
- Valley Plus 7 Celsius in the morning, falling to plus 2 Celsius by the evening.
- Freezing level Above the summits, falling to 800 M by late evening.
Low cloud and visibility
Extensive cloud above 400 - 600 M in the rain, but lifting above summits away from any isolated showers by the early evening. Poor to very poor visibility in rain or showers
Ground conditions
No recent ground conditions report available.
Mountain weather information
Mon 16 Nov
Sunny spells at first, cloudy in the afternoon with widespread rain, turning to snow on high ground. Feeling very cold in a moderate southerly wind becoming a strong easterly into the evening. Freezing level 700 M
Tue 17 Nov
Cloudy with rain at times, falling as snow above 700 M. Feeling very cold in an initially strong easterly wind which will become a fresh northerly by the afternoon. Freezing level 900 M
Wed 18 Nov
Some sunny spells and largely dry through daylight hours. Still feeling very cold in a fresh northwesterly wind. Freezing level 900 M
Summit specific forecast
Mountain summits
Other points of interest
Cluster of multiple stations