Welcome to Snowpack Tracker for the Bridger-Teton Avalanche Center (BTAC)!
Display defaults to 24-hr data for the previous 30 days. This view is a reduced set of panels, with additional data for the current season including SKY condition, SH/NSF, multiday new snow and SWE sums, and daily avalanche hazard rating. The Image Export tool provides a high-res image (.png) of the current view.
Display defaults to 24-hr data for the current season, with the ability to view historic seasons back to 1974-75. Includes weather and avalanche event panels from Snowpack Tracker, with additional panels including multiday cumulative SWE, new snow density, and 24-hr wind totals. Each panel includes pan, zoom, and image export tools on the right side-bar.
Display defaults to hourly data for the previous 48 hrs, with data viewable for the previous 7 days. Weather stations are located throughout the BTAC forecast areas, with data latency of ~30 min (e.g. observations for 7:00 AM will be displayed by 7:30 AM for most stations). Use the interactive legend to toggle stations on/off.
New for the 2019-20 season, this display shows avalanche events plotted on an aspect/elevation rose diagram. Markers are colored by crown depth and sized by relative size. The interactive table displays all event metadata for the selected time range and checkbox filters. Table rows are sortable, column width is adjustable, and single or multiple events selected from the table are highlighted on the plot. This page currently displays 2018-19 events, and will update for the 2019-20 season when new event data is submitted.
Snowpack Tracker and Historic Data display 24-hr data (or "white sheet" data) from the Bridger-Teton Avalanche Center (BTAC). Data is sourced from snow study plots and weather stations at Jackson Hole Mountain Resort (JHMR), including Rendezvous Bowl plot (9,580'), Raymer plot (9,360'), Mid-Mountain plot (8,180'), and Rendezvous Summit (10,450'). This dataset has been maintained by the BTAC and JHMR Ski Patrol since the late 1960s.
Snowpack Tracker and Historic Data display the following derived or manually recorded data:
Events submitted by the public or recorded by BTAC forecasters are color-coded for crown depth. Note that crown depth is often estimated by observers. 'Area' includes events from avalanche control work at Jackson Hole Mountain Resort, and 'BC' is all recorded backcountry events. Many avalanches occur during periods with limited visibility and/or in remote locations and are not observed or reported.
Snow depth is manually measured from a total snow depth stake, and 24-hr new snow and snow water equivalent (SWE) are measured using a SnowMetrics density tube. Measurements represent previous 24-hr totals, and are taken at approximately 10 AM daily. SWE is displayed as SWEx10 to enable quick estimation of new snow density. For example, new snow and SWEx10 bars of equal height represent 10% density. Settlement is calculated as [total depth previous day] + [24-hr new snow] - [total depth current day].
SKY conditions and the presence (Yes or No) of surface hoar / near-surface faceting are based on observations from BTAC forecasters, and represent general conditions for the Teton forecast area. SKY condition follows standard SWAG codes.
Calculated from 24-hr measured SWE, using rolling cumulative sums over the specified window length.
Calculated from 24-hr new snow and SWE values, and represented as a unitless fraction following standard SWAG methods.
Includes minimum and maximum values during the previous 24 hrs (5am - 5am).
Includes previous 24-hr (5am - 5am) average wind speed, wind direction, and maximum gust. Wind direction vectors indicate the compass direction the wind is from. Recorded at Rendezvous Summit and the Raymer wind station (located on the Headwall ridge above the Raymer Plot). Note: wind direction vectors are best viewed for time ranges of ~3 months or less.
Wind sources same as above, expressed as miles per day (total miles of wind in previous 24 hrs).
Visit Synoptic Data to learn more about the Mesonet API services, which provide access to surface weather data across North America and globally. For more information on avalanche events and hazard data, contact the Bridger-Teton Avalanche Center.
Yes! We have intentionally designed Snowpack Tracker to be transferable to additional regions by leveraging generalized templates and standardized weather data from the Synoptic API. Contact Patrick Wright (firstname.lastname@example.org) or Tobey Carman (email@example.com) for additional information. Visit us at inversionlabs.com.