Mountain weather
Eryri / Snowdonia
Confidence
High for largely settled conditions Friday and through much of Saturday and again for settled conditions next week, but lower through Saturday evening and Sunday due to uncertainties over the arrival and clearance of a slow moving, but weakening, front edging southeast across the area.
-
This eveningSunrise:Sunset:
-
Fri 30 OctSunrise:Sunset:
-
Sat 31 OctSunrise:Sunset:
-
Further outlook
This evening forecast
Dry with long clear spells. Occasionally strong winds at height.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
Mountain weather forecast
Dry with long sunny spells. Occasionally strong southerly winds easing
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
Weather
(at 800m)
|
Weather symbols |  |
|
 |
 |
 |
|
|
|
|
Chance of
precipitation (at 800m)
|
Chance of precipitation |
10%
|
10%
|
10%
|
10%
|
10%
|
10%
|
10%
|
10%
|
Wind direction and speed
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | SE 27mph knots
SE
27mph |
SE 26mph knots
SE
26mph |
S 25mph knots
S
25mph |
S 24mph knots
S
24mph |
S 20mph knots
S
20mph |
S 15mph knots
S
15mph |
SE 14mph knots
SE
14mph |
SE 13mph knots
SE
13mph |
|
600m
|
600m | S 17mph knots
S
17mph |
S 16mph knots
S
16mph |
S 15mph knots
S
15mph |
S 15mph knots
S
15mph |
S 14mph knots
S
14mph |
S 10mph knots
S
10mph |
SE 8mph knots
SE
8mph |
SE 8mph knots
SE
8mph |
|
300m
|
300m | SE 10mph knots
SE
10mph |
SE 10mph knots
SE
10mph |
SE 9mph knots
SE
9mph |
SE 9mph knots
SE
9mph |
S 9mph knots
S
9mph |
S 6mph knots
S
6mph |
SE 5mph knots
SE
5mph |
SE 5mph knots
SE
5mph |
|
Valley
|
Valley | SE 11mph knots
SE
11mph |
SE 10mph knots
SE
10mph |
SE 10mph knots
SE
10mph |
S 10mph knots
S
10mph |
S 9mph knots
S
9mph |
S 7mph knots
S
7mph |
SE 6mph knots
SE
6mph |
SE 7mph knots
SE
7mph |
Wind gust
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | 33mph | 33mph | 31mph | 30mph | 26mph | 20mph | 17mph | 16mph |
|
600m
|
600m | 24mph | 24mph | 22mph | 22mph | 20mph | 15mph | 12mph | 13mph |
|
300m
|
300m | 22mph | 21mph | 19mph | 19mph | 16mph | 12mph | 10mph | 10mph |
|
Valley
|
Valley | 23mph | 22mph | 21mph | 20mph | 17mph | 13mph | 11mph | 13mph |
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | ||||||||
|
600m
|
600m | ||||||||
|
300m
|
300m | ||||||||
|
Valley
|
Valley | ||||||||
| Freezing Level | Freezing Level |
2200m
|
2200m
|
2200m
|
2100m
|
2200m
|
2100m
|
2100m
|
2100m
|
Additional weather information
Meteorologist's view
Rather cold on the summits, especially through the morning, with gusts around 45mph over ridges and summits at first.
Weather
Mainly dry with long clear spells overnight. Then a dry day with some long spells of sunshine. Remaining dry through the evening with long clear spells, and perhaps some low level mist and fog patches.
Chance of cloud-free hill tops
Close to 100%
Low cloud and visibility
Little or no cloud expected below summit levels. Otherwise visibility good or very good, falling to a kilometre or less in any evening low level mist and fog patches.
Ground conditions
No recent ground conditions report available.
Mountain weather information
Weather
Clear spells overnight with some low level mist and fog patches likely. Overnight low level mist and fog clearing through the morning, but generally a fine day on the mountains with some long sunny spells, although perhaps a little hazy due to high cloud, especially through the afternoon. Cloud, above the summits, thickens through the late afternoon and evening.
Chance of cloud-free hill tops
Close to 100%.
Maximum wind speed expected
Southerly or southeasterly 10-15mph.
Temperature
- At 800m Around 6 or 7 Celsius
- Valley Around 4 or 5 Celsius at dawn rising to plus 13 or 14 by day
- Freezing level Above the summits
Low cloud and visibility
Risk of some thin cloud over foothills as low level mist and fog lifts, otherwise little or no cloud below the summits expected. Otherwise, visibility very good, but a kilometre or less in any low level mist and fog patches.
Ground conditions
No recent ground conditions report available.
Mountain weather information
Sun 1 Nov
Cloudy with a little rain around, perhaps some late bright or sunny spells developing. Mainly light winds turning northeasterly. Freezing level above summits.
Mon 2 Nov
Lingering low level mist and fog patches, but largely sunny on the mountains. Freshening easterly or northeasterly winds. Freezing level above the summits.
Tue 3 Nov
Risk of low level mist and fog, but mountains remaining dry and with some long sunny spells. Occasionally fresh easterly or northeasterly winds. Freezing level above summits, perhaps a touch of low level frost.
Summit specific forecast
Mountain summits
Other points of interest
Cluster of multiple stations