Avalanche Activity Images

  • Mt Rolleston (2275m) - Bealey Slide30/08/2023
    Mt Rolleston (2275m) - Bealey Slide
  • Upper Punchbowl Creek29/08/2023
    Upper Punchbowl Creek
  • Philistine Ramp22/08/2023
    Philistine Ramp
  • Upper Otira Valley (2nd last TL path before rock garden)22/08/2023
    Upper Otira Valley (2nd last TL path before rock garden)
  • Edwards Valley - 300m below hut24/09/2022
    Edwards Valley - 300m below hut
  • Avalanche Peak Track (1650m, S aspect)24/07/2022
    Avalanche Peak Track (1650m, S aspect)
  • Halpin Creek Basin (1700m, E aspect)24/07/2022
    Halpin Creek Basin (1700m, E aspect)
  • Lyell Peak - East aspect29/06/2022
    Lyell Peak - East aspect
  • Mt Bealey - North/East aspects29/06/2022
    Mt Bealey - North/East aspects
  • Rome Ridge - Lower northern aspect29/06/2022
    Rome Ridge - Lower northern aspect
  • Goat Pass, East flank19/06/2022
    Goat Pass, East flank
  • Bealey Valley - Goldney Ridge south aspect18/06/2022
    Bealey Valley - Goldney Ridge south aspect
  • Upper Bealey Valley - Goldney Ridge south aspect18/06/2022
    Upper Bealey Valley - Goldney Ridge south aspect
  • Mt Williams - SE chute (Edwards Valley)17/06/2022
    Mt Williams - SE chute (Edwards Valley)
  • Rome Ridge - Northern aspect23/10/2021
    Rome Ridge - Northern aspect
  • Bealey "Glacier" (Mt Rolleston) - Bealey Valley02/10/2021
    Bealey "Glacier" (Mt Rolleston) - Bealey Valley
  • Bealey Slide (Mt Rolleston)02/10/2021
    Bealey Slide (Mt Rolleston)
  • Mt Rolleston - Goldney Ridge (east aspect)31/08/2021
    Mt Rolleston - Goldney Ridge (east aspect)
  • Mt Bealey - Lyell Traverse (East aspect)18/08/2021
    Mt Bealey - Lyell Traverse (East aspect)
  • Mt Cloudsley (east aspect)15/08/2021
    Mt Cloudsley (east aspect)
  • Crow Valley - Under Crow Face (Rolleston)31/07/2021
    Crow Valley - Under Crow Face (Rolleston)
  • Temple Basin - Downhill Basin (north aspect)02/06/2021
    Temple Basin - Downhill Basin (north aspect)
  • Temple Basin - Downhill Basin (west aspect)02/06/2021
    Temple Basin - Downhill Basin (west aspect)
  • Rome Ridge - Mt Rolleston18/09/2020
    Rome Ridge - Mt Rolleston

Snowfall Model Data / Graphs

The following graphs represent calculated snowpack (and snowfall) at various altitudes in the range 800m - 2000m. It is based on extensive field data obtained of average snowpack and high altitude weather readings on Mt Rolleston's Goldney Ridge (Arthur's Pass National Park) in 2007-2009. Slope angles are based on 20º-25º (windslab is not represented in snowpack depths, but is estimated separately).

Experimental avalanche risk modelling (%) is based on calculated new snow depths, snowpack layer density, free water content, perceived crusts (rain & wind) within the overall snowpack, windslab presence, temperature, humidity and rainfall estimations. Note that the avalanche modelling functions take into account possible path travel distances of triggered avalanche events, hence low altitude areas can still show high risk although stable snow exists at these levels (visit for human analysed avalanche assessments).


  • Graphs are not updated with "todays" snowfall & snow-pack data until midnight on that day when all the day's data is reassessed and crunched.
  • All snowpack data for 2012 & 2013 was lost due to a lightning struck PC. The original graphs will be maintained, but no raw data is recoverable.
  • Click Here to view a HTML table showing snowfall data for 2023. Right Click Here to save a CSV file containing snowfall data for 2023.
Snowpack Model 800m - 1800m (Last 150 days)

29/09/2023 12:04
Snow Fall-Line: 1361m
Mt Rolleston (Goldney Ridge) 800m
Alt. Temp: 4.4ºC
Freezing Level: 1647m
Lapse Rate: -0.525ºC/+100m
Alt. Humidity: 90%
Alt. Min Humidity: 80%
Alt. Max Humidity: 96%
Alt. Windspeed: 17.4kmph
Alt. Av. Windspeed: 13.4kmph
Alt. Min. Windspeed: 0.0kmph
Alt. Max. Windspeed: 30.8kmph
Alt. Wind Chill: 0.7ºC
Alt. Air Pressure: 898hPa
Alt. Day Rainfall: 6.4mm
Alt. 3 Day Rainfall: 7.9mm
Last Snowfall: 1 day ago
7 Day Snowfall: 13.0cm
Snowpack Depth: 0.0cm
Mt Rolleston (Goldney Ridge) 1000m
Alt. Temp: 3.4ºC
Freezing Level: 1647m
Lapse Rate: -0.525ºC/+100m
Alt. Humidity: 89%
Alt. Min Humidity: 79%
Alt. Max Humidity: 95%
Alt. Windspeed: 21.3kmph
Alt. Av. Windspeed: 16.4kmph
Alt. Min. Windspeed: 0.0kmph
Alt. Max. Windspeed: 37.7kmph
Alt. Wind Chill: -1.1ºC
Alt. Air Pressure: 876hPa
Alt. Day Rainfall: 5.7mm
Alt. 3 Day Rainfall: 6.9mm
Storm Snowfall (4hrs): 0.3cm
7 Day Snowfall: 15.8cm
Snowpack Depth: 0.0cm
Mt Rolleston (Goldney Ridge) 1500m
Alt. Temp: 0.8ºC
Freezing Level: 1647m
Lapse Rate: -0.525ºC/+100m
Alt. Humidity: 87%
Alt. Min Humidity: 78%
Alt. Max Humidity: 93%
Alt. Windspeed: 101.8kmph
Alt. Av. Windspeed: 45.3kmph
Alt. Min. Windspeed: 2.5kmph
Alt. Max. Windspeed: 101.8kmph
Alt. Wind Chill: -9.6ºC
Alt. Air Pressure: 822hPa
Alt. Day Rainfall: 1.8mm
Alt. 3 Day Rainfall: 2.1mm
Daily Snowfall: 2.2cm
Snowfall Max. Intensity: 0.8cm/hr (10:04hrs)
Storm Snowfall (4hrs): 2.4cm
7 Day Snowfall: 29.9cm
Snowpack Depth: 11.9cm
Windslab N: 38.0cm
Windslab S: 3.2cm
Windslab E: 4.2cm
Mt Rolleston (Goldney Ridge) 1800m
Alt. Temp: -0.8ºC
Freezing Level: 1647m
Lapse Rate: -0.525ºC/+100m
Alt. Humidity: 86%
Alt. Min Humidity: 77%
Alt. Max Humidity: 92%
Alt. Windspeed: 111.7kmph
Alt. Av. Windspeed: 49.8kmph
Alt. Min. Windspeed: 2.7kmph
Alt. Max. Windspeed: 111.7kmph
Alt. Wind Chill: -12.2ºC
Alt. Air Pressure: 791hPa
Alt. Day Rainfall: 0.5mm
Alt. 3 Day Rainfall: 0.5mm
Daily Snowfall: 3.0cm
Snowfall Max. Intensity: 1.1cm/hr (10:04hrs)
Storm Snowfall (4hrs): 3.1cm
7 Day Snowfall: 39.8cm
Snowpack Depth: 137.0cm
Windslab N: 51.7cm
Windslab S: 6.2cm
Windslab E: 7.9cm
Surface Stability (@ 35º): Very Poor (Warning: Slab present!)
Avalanche Chance: 55%
Mt Rolleston (Goldney Ridge) 2000m
Alt. Temp: -1.9ºC
Freezing Level: 1647m
Lapse Rate: -0.525ºC/+100m
Alt. Humidity: 85%
Alt. Min Humidity: 76%
Alt. Max Humidity: 91%
Alt. Windspeed: 116.3kmph
Alt. Av. Windspeed: 51.8kmph
Alt. Min. Windspeed: 2.8kmph
Alt. Max. Windspeed: 116.3kmph
Alt. Wind Chill: -13.9ºC
Alt. Air Pressure: 770hPa
Alt. Day Rainfall: 0.2mm
Alt. 3 Day Rainfall: 0.2mm
Daily Snowfall: 2.0cm
Snowfall Max. Intensity: 0.7cm/hr (10:04hrs)
Storm Snowfall (4hrs): 2.1cm
7 Day Snowfall: 34.9cm
Snowpack Depth: 150.4cm
Windslab N: 32.6cm
Windslab S: 3.8cm
Windslab E: 5.1cm
Surface Stability (@ 32º): Very Poor (Warning: Slab present!)
Avalanche Chance: 48%

Snowfall Model 800m - 1800m (Last 150 days)

Freezing Level (Last 7 days)

Altitude Rainfall 1000m - 2000m (Last 30 days)

Snowpack Model 800m - 1800m (Previous 12 months)

Snowpack Model 1800m (2014+)

Snowpack Model 1800m (2004 - 2013)

Snowpack Models 2023 - 2002 (1800m snowfall shown only)

2023 Snow Data

snowtable.csv (CSV File of 2023 data)

2022 Snow Data

snowpack2022.xlsx (XLS File of 2022 data)
2022 Snowpack Data

2021 Snow Data

snowpack2021.xlsx (XLS File of 2021 data)
2021 Snowpack Data

2020 Snow Data

snowpack2020.xlsx (XLS File of 2020 data)
2020 Snowpack Data

2019 Snow Data

snowpack2019.xlsx (XLS File of 2019 data)
2019 Snowpack Data

2018 Snow Data

snowpack2018.xls (XLS File of 2018 data)
2018 Snowpack Data

2017 Snow Data

snowpack2017.xls (XLS File of 2017 data)
2017 Snowpack Data

2016 Snow Data

snowpack2016.xls (XLS File of 2016 data)
2016 Snowpack Data

2015 Snow Data

snowpack2015.xls (XLS File of 2015 data)
2015 Snowpack Data

2014 Snow Data

snowpack2014.xls (XLS File of 2014 data)
2014 Snowpack Data

2013 Snow Data

Sorry - No data available for 2013!
2013 Snowpack Data

2012 Snow Data

snowpack2012.xls (XLS File of 2012 data)
2012 Snowpack Data

2011 Snow Data

snowpack2011.xls (XLS File of 2011 data)
2011 Snowpack Data

2010 Snow Data

snowpack2010.xls (XLS File of 2010 data)
2010 Snowpack Data

2009 Snow Data

snowpack2009.xls (XLS File of 2009 data)
2009 Snowpack Data

2008 Snow Data

snowpack2008.xls (XLS File of 2008 data)
2008 Snowpack Data

2007 Snow Data

snowpack2007.xls (XLS File of 2007 data)
2007 Snowpack Data

2006 Snow Data

snowpack2006.xls (XLS File of 2006 data)
2006 Snowpack Data

2005 Snow Data

snowpack2005.xls (XLS File of 2005 data)
2005 Snowpack Data

2004 Snow Data

snowpack2004.xls (XLS File of 2004 data)
2004 Snowpack Data

2003 Snow Data

snowpack2003.xls (XLS File of 2003 data)
2003 Snowpack Data

2002 Snow Data

snowpack2002.xls (XLS File of 2002 data)
2002 Snowpack Data

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