Snow star crystal 1.5mm diameter grown on an electric needle: Photo Ken Libbrecht. Snow covered Stevenson screen.

Llansadwrn (Anglesey) Weather:
Snowdonia Snowline Report

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Logo: Llansadwrn Weather - Melin Llynnon, Ynys Môn.

Snowdonia Mountains Winter Season 2021/22

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Snow on summits of the Snowdon Horseshoe on 4 January 2010.

 

 

October 2021

Snowberry berries. Snow on the way?

Snowberry (left) has white berries well-developed so is it not time for some snow on the mountains? The small rather insignificant pink flowers in summer produce white round and fleshy berries in the autumn. They are particularly lush this year...

 

 

 

November

On the 21st the weather had turned colder and there were showers of hail across Anglesey and the mountains early in the day. A sprinkling of snow was seen on Yr Wyddfa in the afternoon. Further wintry showers 24/25th with some snow on Yr Wyddfa and Garnedd Ugain on the afternoon of the 25th. Wintry showers on the 26th with increasing N'ly wind, the Met Office issued an Amber warning for severe wind affecting Anglesey and Snowdonia 26/27th. There was slight snow scattered on the summits of the Carneddau and Yr Wyddfa in the afternoon of the 27th. Further ice precipitation fell overnight 27/28th leaving a light covering of snow lying at 0900 GMT on the 28th above 2750 ft with some at 2000 ft and sprinklings as low as 1500 ft in places on the Carneddau and summits around Yr Wyddfa.

December

Snow was present on the 1st and light snow had fallen on the 2nd and was lying on the Carneddau Mountains at 2000 ft and around Yr Wyddfa with sprinklings as low as 1850 ft. Small patches and pockets of ice remained above 3000 ft. On the 7th and 8th snow was lying above 2500 ft and on the 9th above 2750 ft with 30% cover at 2250 ft on the slopes of the Carneddau. By the 13th frequent small patches of snow and pockets of ice remained including small cornices in places. Frequent pockets of ice were persisting on C. Llewelyn and Dafydd with small cornices on Y Garn on 20/21st, as well patches of snow around Yr Wyddfa above 3100 ft and a patch on Garnedd Ugain at 3250 ft on the 22nd. On the 26th slight fresh snow had fallen and was lying above 2750 ft on the Carneddau and Y Garn at 3250 ft small patches persisting in a few places including around Yr Wyddfa. ..

 

January 2022

The year began with no signs of snow on the mountains until the 4th when sprinklings appeared on Y Garn above 2500 ft and a covering on the Carneddau above 2500 ft with some as low as 2250 ft. On the 5th further light snow had fallen on the Carneddau lying above 2000 ft with 30% as low as 1850 ft. In the afternoon a covering was seen on Glyder Fawr and Yr Wyddfa above 2000 ft. On the 6th light snow was lying above 1800 ft and on the 7th at 2500 ft on the Carneddau and 1800 ft on Yr Wyddfa. On the 12th gully snow and snow patches were persisting in places ...

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Snowdonia snowline current histogram.

     

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  • Read about ice precipitation; snow and the different types of hail on this website  Snow and types of hail.
  • To find out more about snow and ice crystals

    visit Ken Libbrecht's website Link through to Ken Libbrecht's site
  • Before you go on the mountains checkout the Met Office forecast for Snowdonia for the National Park
  • Other Met Office British Mountain area forecasts
  • AWS weather stations and live webcams
  • Gorddinog, Llanfairfechan AWS
  • Gorwel Heights, Llanfairfechan AWS
  • Mynydd Llandegai AWS
  • and webcam Click for Carneddau webcam
  • The OGGI webcams Click for the OGGI webcam
  •  

  • Ogwen Valley Mountain Rescue Organisation.   Ogwen Valley Mountain Rescue Organisation OVMRO
  • Current weather at Llyn Ogwen.   Current weather AWS

    Cairngorm

  • Cairngorm summit weather station Intermittent operation Courtesy of Heriot-Watt University Physics Department
  • Information cairngormmountain.org

  • You can view the snowline histograms for previous years here:

  • Winter 2020-2021. Winter 2020-2021
    Winter 2019-2020. Winter 2019-2020
    Winter 2018-2019. Winter 2018-2019
    Winter 2017-2018. Winter 2017-2018

  • You can view complete snowline reports for previous years here:

  • Winter 2020-2021. Winter 2020-2021
    Winter 2019-2020. Winter 2019-2020
    Winter 2018-2019. Winter 2018-2019
    Winter 2017-2018. Winter 2017-2018

  • For earlier archived reports refer to the Site Map.

  •  

    Notes

    Observations are made as near to 0900 GMT as possible. I have a good view from Llansadwrn, weather permitting, across the Menai Strait towards the Snowdonia Mountains. I can see the northern slopes of the mountain range from Moel Eilio (west of Snowdon), Snowdon summits (Yr Wyddfa and Crib Goch), the Glyderau and Carneddau to Foel-fras and Drum to the east of the range near the Conwy Valley. With the aid of binoculars I make daily records that include any ice precipitation observed, the lowest altitude of snow lying at ( >= 50% cover), at ( >= 30% cover) and snow patches. I aim to update the diagram during the season at least twice weekly if there is any snow.

    Designed and written by Donald Perkins, Copyright © 1998 - 2021. All Rights Reserved.

    Page first published 1 October 2021 and will be updated during the season

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