Mountain weather
Eryri / Snowdonia
Confidence
Uncertainty remains for timings of low cloud and rain/drizzle moving northwards into the region through the afternoon, but confidence in a gradual deterioration later in the day remains high.
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This eveningSunrise:Sunset:
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Tue 10 NovSunrise:Sunset:
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Wed 11 NovSunrise:Sunset:
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Further outlook
This evening forecast
Initial mist and fog will clear for a time before rain and drizzle encroaches from the south, bringing further mist and fog into the evening.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
Severe Chill Effect
Poor Visibility
Storm Force Winds
Mountain weather forecast
Mist and fog in the morning, clearer but cloudy through midday with rain/drizzle starting. Mist/fog returning later. Feeling gusty on western summits.
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
Weather
(at 800m)
|
Weather symbols |  |
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 |
|
 |
 |
|
|
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Chance of
precipitation (at 800m)
|
Chance of precipitation |
10%
|
20%
|
20%
|
20%
|
40%
|
60%
|
80%
|
80%
|
Wind direction and speed
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | E 29mph knots
E
29mph |
E 29mph knots
E
29mph |
E 28mph knots
E
28mph |
E 27mph knots
E
27mph |
E 25mph knots
E
25mph |
E 23mph knots
E
23mph |
E 25mph knots
E
25mph |
E 27mph knots
E
27mph |
|
600m
|
600m | E 17mph knots
E
17mph |
E 16mph knots
E
16mph |
E 16mph knots
E
16mph |
E 16mph knots
E
16mph |
E 16mph knots
E
16mph |
E 13mph knots
E
13mph |
E 15mph knots
E
15mph |
E 16mph knots
E
16mph |
|
300m
|
300m | E 13mph knots
E
13mph |
E 13mph knots
E
13mph |
E 13mph knots
E
13mph |
E 14mph knots
E
14mph |
E 14mph knots
E
14mph |
E 11mph knots
E
11mph |
E 12mph knots
E
12mph |
E 13mph knots
E
13mph |
|
Valley
|
Valley | SE 13mph knots
SE
13mph |
SE 13mph knots
SE
13mph |
SE 13mph knots
SE
13mph |
SE 13mph knots
SE
13mph |
SE 14mph knots
SE
14mph |
E 11mph knots
E
11mph |
E 10mph knots
E
10mph |
E 11mph knots
E
11mph |
Wind gust
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | 37mph | 37mph | 37mph | 38mph | 34mph | 31mph | 36mph | 38mph |
|
600m
|
600m | 29mph | 29mph | 28mph | 28mph | 27mph | 24mph | 27mph | 29mph |
|
300m
|
300m | 26mph | 26mph | 26mph | 26mph | 24mph | 21mph | 23mph | 25mph |
|
Valley
|
Valley | 26mph | 26mph | 26mph | 26mph | 24mph | 20mph | 21mph | 22mph |
|
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 |
1200m
|
1200m
|
1200m
|
1200m
|
1300m
|
1400m
|
2000m
|
2100m
|
Additional weather information
Meteorologist's view
A potentially misty and foggy start, especially on eastern hills, will give way to improved visibility for a time from midday before rain and drizzle moves in from the south. By evening, mist and fog will have returned with persistent rain and drizzle so good navigation skills will again be required. Wind will feel gusty on western slopes throughout the day, especially on exposed summits or ridges, with noticeable buffeting of clothes likely and balance affected. Cold temperatures at height mixed with incoming wet conditions will bring a risk of severe wind chill so suitable clothing as advised.
Weather
Largely dry to start, with extensive mist and hill fog over eastern slopes and some western summits overnight and early morning. Visibility will improve for a time into late morning and through early afternoon before rain and drizzle moves in from the south, affecting most summits by sunset. This will increase in intensity into the evening with mist and hill fog returning to high ground. Western summits and ridges will feel gusty at times with a risk of severe wind chill.
Chance of cloud-free hill tops
20% around sunrise, increasing to 60% by early afternoon particularly on western hills before reducing to 20% again into the evening.
Low cloud and visibility
Extensive low cloud above 700m at first, rising above most summits by early afternoon before lowering again to 800-900m by evening. Visibility good to moderate in dry conditions beneath cloud bases, moderate in rain or drizzle but poor in hill fog.
Ground conditions
No recent ground conditions report available.
Mountain weather information
Weather
Mist and rain/drizzle covering the area during the morning and early afternoon, with slopes above 700-800m in hill fog regularly during this period. Conditions largely clearing by evening.
Chance of cloud-free hill tops
10-20% until late afternoon when it will increase to 60%, especially in the far north.
Maximum wind speed expected
East or northeasterly 15mph gusting 25 mph, mainly in the west and easing later in the afternoon.
Temperature
- At 800m Plus 1 Celsius rising to Plus 2 Celsius.
- Valley Plus 5 Celsius rising to plus 8 Celsius.
- Freezing level Above the summits.
Low cloud and visibility
Extensive low cloud during the morning with moderate visibility in mist/drizzle and poor visibility in hill fog. Good visibility likely over northern hills by late afternoon.
Ground conditions
No recent ground conditions report available.
Mountain weather information
Thu 12 Nov
Largely clear and dry with good visibility throughout. Light winds expected for most of the area but feeling cold still with freezing level dropping to 700-800m.
Fri 13 Nov
Similar overall to Thursday but with freezing level increasing to 1000m by evening.
Sat 14 Nov
Some light showers possible on and off through the day but visibility should remain good with minimal low cloud. West/northwesterly winds increasing slightly by late afternoon. Freezing level remaining above summits.
Summit specific forecast
Mountain summits
Other points of interest
Cluster of multiple stations