Use my current location crosshair

Snowdonia

Weather hazards over 300m on Tue 26 May 2015

High risk

No high risks
none

Medium risk

Strong sunlight
Periods of strong sunshine likely through the afternoon.

Low risk

Persistent extensive hill fog
Some hill fog likely through the early hours.

No risk

Blizzards
none
Heavy snow
none
Storm force winds
none
Gales
none
Severe chill effect
none
Thunderstorms
none
Heavy persistent rain
none

Tue 26 May 2015

A cloudy morning, with the odd spot of drizzle is just about possible, although most areas should stay dry. Hill fog should again gradually lift, readily breaking by midday with perhaps more in the way of sunshine than on recent days. Remaining dry into the evening with clear spells.

Time
0000 to 0300 0300 to 0600 0600 to 0900 0900 to 1200 1200 to 1500 1500 to 1800 1800 to 2100 2100 to 2400
Weather
Partly cloudy night Cloudy Cloudy Sunny intervals Sunny intervals Sunny intervals Sunny intervals Partly cloudy night
Precipitation probability
0% 10% 0% 0% 0% 0% 0% 0%

Visibility

Very poor in hill fog, otherwise good

Hill Fog

Broken around 400 to 500 m dissipating by early afternoon.

Max wind above 500m

Northwesterly around 15 to 20 mph.

Temperature

Valleys:
Plus 5 becoming 14 Celsius.
800m:
Plus 5 to 7 Celsius.
Freezing level:
Above the summits.

Issued at: 1518 on Mon 25 May 2015

Wed 27 May 2015

Fine through the early hours with sunny spells to start Wednesday. However high cloud will invade from the west during the morning heralding a spell of wet and windy weather for the afternoon and evening. Some heavy and persistent rain will set in, and this combined with the strengthening wind will make it feel cold.

Visibility

Very poor in hill fog, otherwise good.

Hill Fog

Ragged bases around 400 meters at first clearing for a time. Broken or blanket bases 300 to 400 meters developing as the rain sets in.

Max wind above 500m

Northwesterly 40 to 45 mph late afternoon and evening.

Temperature

Valleys:
Plus 3 becoming 12 Celsius.
800m:
Plus 6 Celsius.
Freezing level:
Above the summits.

Issued at: 1518 on Mon 25 May 2015

Thu 28 May 2015

Strong northwesterly winds will bring some heavy showers through the early hours. Becoming drier by midday with some sunshine and just the odd shower. The winds will gradually ease.

Issued at: 1518 on Mon 25 May 2015

Fri 29 May 2015

Winds will continue to ease. There will be some showery rain at times, perhaps becoming more persistent by evening with some hill fog.

Issued at: 1518 on Mon 25 May 2015

Sat 30 May 2015

Cloudy for much of the day with rain at times and hill fog. Winds will be light. Freezing levels will be above the summits throughout the outlook period.

Issued at: 1518 on Mon 25 May 2015