Skiing the Cascade Volcanoes
        Amar Andalkar's Ski Mountaineering and Climbing Site
Ski Mountaineering Photos & Trip Reports Equipment & Info Cascade Volcanoes Ring of Fire Site Map

Table of Contents | Introduction | Ratings | WebCams | Bibliography | Highest Volcanoes | Snowfall & Snowdepth | Monthly Chart | Conifers | Compare | Distance | Sun Chart
Historical NWAC Snowdepth Data & Plots         (page created February 2005, updated February 2006)


See the main Cascade Snowfall and Snowdepth page, plus Snow Season Reports: 2005-2006, 2004-2005, 2003-2004, 2002-2003
See also Previous Seasons, Normals & Info, Cascades El Niño / La Niña, and NEW Paradise & Crater Lake Snowfall/Snowdepth Plots

    This page contains an archive of snowdepth data at selected sites in the Olympic Mountains and Cascade Range from Mount Baker to Mount Hood (and now extended north to Whistler Mountain and south to Crater Lake and Lassen Chalet), covering the period from November 15 to May 1 starting with the 1916-17 season. This data was originally compiled by the Northwest Weather and Avalanche Center (NWAC), and I have taken the liberty of supplementing it with additional data including the Whistler, Crater Lake, and Lassen sites. I have written a custom plotting program (using PHP and the GD graphics library) to display the data for any season or site, with user-selectable options for which data and plot elements are shown, including average, maximum, and minimum values. The ENSO status can be displayed for seasons since 1949-50. A table below the graph shows the full set of available data for each season or site. See the Notes and Version History below for additional info. This page largely supersedes the older Archive of NWAC Climatological Snowdepth Reports with original NWAC reports back to 1997. The plotting program is new as of February 2005, updated April 2005. Please notify me of any problems or bugs, and I will attempt to fix them as soon as possible.

Plotting Program Mode:   Single Season, Multiple Sites   Single Site, Multiple Seasons (up to 12)  
Data Points: Show   Hide  
Data Lines: Show   Hide  
Max Values: Show   Hide  
Gridlines:   Show   Hide  
ENSO Status:   Show   Hide  
Plot Legend:   Show   Hide  
    Season:
  Plot All Available Sites
  Whistler Mountain (1973- )
  Hurricane Ridge (1979- )
  Mt Baker Ski Area (1926- )
  Stevens Pass (1939- )
  Snoqualmie Pass (1929- )
  Stampede Pass (1943- )
  Mission Ridge (1970- )
  Crystal Mountain (1967- )
  Mt Rainier Paradise (1916- )
  White Pass (1976- )
  Mt Hood Timberline (1973- )
  Mt Hood Meadows (1973- )
  Crater Lake Park HQ (1919- )
  Lassen Chalet (1986- )
2005-2006 Season 11/15/05 12/1/05 12/15/05 1/1/06 1/15/06 2/1/06 2/15/06 3/1/06 3/15/06 4/1/06 4/15/06 5/1/06
Whistler Mountain  5400 ft 24" 34" 30" 54" 99" 107" 96" 104" 114" —   —   —  
Hurricane Ridge  5100 ft —   30" 28" 37" 74" 107" 101" 104" 124" —   —   —  
Mt Baker Ski Area  5400 ft 69" 67" 59" 66" 134" 177" 172" 188" 199" —   —   —  
Stevens Pass  4000 ft 36" 50" 40" 56" 81" 125" 117" 127" 133" —   —   —  
Snoqualmie Pass  3000 ft 22" 39" 33" 49" 83" 112" 106" 118" 118" —   —   —  
Stampede Pass  3900 ft —   —   —   —   —   —   127" —   135" —   —   —  
Mission Ridge  5300 ft —   22" 21" 35" 48" 67" 63" 66" 68" —   —   —  
Crystal Mountain  4400 ft 36" 40" 36" 54" 70" 103" 92" 95" 107" —   —   —  
Mt Rainier Paradise  5400 ft 48" 60" 58" 91" 135" 172" 162" 179" 201" —   —   —  
White Pass  4500 ft 19" 26" 22" 46" 50" 73" 70" 74" 91" —   —   —  
Mt Hood Timberline  6000 ft 40" 50" 65" 90" 120" 177" 164" 176" 203" —   —   —  
Mt Hood Meadows  5200 ft 41" 51" 66" 96" 110" 154" 153" 154" 181" —   —   —  
Crater Lake Park HQ  6400 ft 30" 54" 53" 91" 114" 150" 129" 147" 168" —   —   —  
Lassen Chalet  6700 ft —   14" 12" 47" 84" 97" 72" 93" 152" —   —   —  

Useful Information and Notes

•  Some of the sites have completely missing seasons of data within their period of record: 1942-1946, 1953-58, and 1974-75 for Mount Baker Ski Area; 1945-46 and 1948-50 for Stevens Pass; 1951-52 for Snoqualmie Pass; 1976-77 for Mission Ridge; 1918-19 and 1949-50 for Mount Rainier Paradise; 1925-26, 1928-29, and 1942-46 for Crater Lake. All of the sites have various other missing values, especially early and late season, but most sites generally have 85-95% of possible data values within their period of record. Hurricane Ridge is missing a large fraction of its data points, but no entire seasons.        
Examples of Really Huge Snow Seasons: 1916-17, 1926-27, 1932-33, 1949-50, 1955-56, 1970-71, 1971-72, 1973-74, 1996-97, 1998-99
Examples of Very Poor Snow Seasons: 1929-30, 1933-34, 1940-41, 1941-42, 1962-63, 1976-77, 1980-81, 1991-92, 2000-2001, 2004-2005
Some Weird or Unusual Snow Seasons:  1930-31, 1944-45, 1975-76, 1989-90, 2002-2003
The "Change Mode" and "Update Graph" buttons are identical in function, use either one interchangeably.

Plotting Program Version History

1.0
05 Feb 2005
First online release. Plots multiple sites for a single season. NWAC data file has 5591 snowdepth values at 11 sites back to 1926-27.
1.105 Feb 2005 Added ENSO status display, based on NOAA Climate Prediction Center list of ENSO years.
1.206 Feb 2005Calculates and displays average / maximum / minimum values.
1.306 Feb 2005Added new plotting mode: single site, multiple seasons at once.
1.408 Feb 2005 Updated NWAC data file (using NCDC COOP data) to add 140 missing values and fix several erroneous values.
1.508 Feb 2005 Added Crater Lake to the list of sites, and extended Paradise data back to 1916-17. There are now 6785 snowdepth values in the data file.
1.624 Feb 2005 Added Whistler Mountain to the list of sites. There are now 7117 snowdepth values in the data file.
1.711 Apr 2005 Added Lassen Chalet to the list of sites. There are now 7373 snowdepth values in the data file.

Copyright Notice

Although the data used on this page is within the public domain, the plotting program (including the code and interface) and its output (the generated graphs in GIF format) are ©2005 by Amar Andalkar. Permission is hereby granted for limited non-commercial use of these graphs either online or in non-profit newsletters, but you must obtain permission from me via email (see contact info) prior to any commercial use, including but not limited to publication online or in newspapers, magazines, or books.



Data on this page originally provided by Northwest Weather and Avalanche Center, supplemented by data from the
National Climatic Data Center, Environment Canada National Climate Archive, and Lassen Volcanic National Park.
Thanks to Garth Ferber for providing the complete NWAC historical data set.

Detailed Snow Season Reports: 2005-2006 | 2004-2005 | 2003-2004 | 2002-2003 | Previous Seasons | Normals & Info | Cascades El Niño / La Niña
Table of Contents | Introduction | Ratings | WebCams | Bibliography | Highest Volcanoes | Snowfall & Snowdepth | Monthly Chart | Conifers | Compare | Distance | Sun Chart
Ski Mountaineering Photos & Trip Reports Equipment & Info Cascade Volcanoes Ring of Fire Site Map

Amar Andalkar   Seattle, WA, USA   <About the Author / Contact Me>
All material on this website is ©1997-2014 by Amar Andalkar unless otherwise noted.
Last modified Friday, February 3, 2006