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 2018- 19

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Latest report. Latest reports
Current snowline histogram. Snowline histogram

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

 

 

October

Snow on the NW flank of Snowdon.Wintry weather arrived on the 26th with showers of hail and snow around the summits, heaviest in the afternoon. On the 27th snow was lying thinly on the northern slopes of the Carneddau with icy deposits as low as 1800 ft in places. Slight snow lying above 3000 ft with ice at 2250 ft on the 28th and ice precipiation showers in the evening. Frost at low levels especially valley on the 29th with further wintry showers at times turning summits briefly white. Frost again at low levels on the morning of the 30th slight snow generally above 2500-2750 ft on northern slopes including Snowdon this persisting until the morning of the 31st.

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November

On the 1st no snow could be seen on the mountains.

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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 2017-2018. Winter 2017-2018
    Winter 2016-2017. Winter 2016-2017
    Winter 2015-2016.  Winter 2015-2016

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

  • Winter 2017-2018. Winter 2017-2018
    Winter 2016-2017. Winter 2016-2017
    Winter 2015-2016. Winter 2015-2016

  • 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 - 2018. All Rights Reserved.

    Page first published 14 August 2018 and will be updated during the season

    llansadwrn-wx.co.uk

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