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

Llansadwrn (Anglesey) Weather:
Eryri (Snowdonia) Snowline Report

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Eryri (Snowdonia) Mountains Winter Season 2024/25

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Latest report. Latest reports
Current snowline histogram. Snowline histogram

 

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

 

 

September 2024

There was no snow observed in September.

October

Snow fell and was lying on Caingorm Mountain on the 10th above 3600 ft. Some wintry showers were spotted across some Eryri summits on 10th & 11th.

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November

Snow fell in Eryri on 19 November 2024.Snow fell on the mountains on the 18th and more on the morning of the 19th with whiteout conditions on the summits. Temoeratures were -5C, or below and windy giving blizzards at times at 0900 GMT. Slight snow had settled almost at sea level on the lower slopes of the Carneddau and several cms lying at Llyn Ogwen and A5 near Tryfan and Llyn Tegid.

 

 

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Snowdonia snowline current histogram.

     

  • 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 Eryri/ Snowdonia 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

  • MWIS Mountain Weather Information Service MWIS

  • 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 2023-2024. Winter 2023-2024
    Winter 2022-2023. Winter 2022-2023
    Winter 2021-2022. Winter 2021-2022
    Winter 2020-2021. Winter 2020-2021

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

    • Winter 2023-2024. Winter 2023-2024
    Winter 2022-2023. Winter 2022-2023
    Winter 2021-2022. Winter 2021-2022
    Winter 2020-2021. Winter 2020-2021

  • For earlier archived reports refer to the Site Map.

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    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 - 2025. All Rights Reserved.

    Page first published 1 October 2024 and will be updated during the season

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