PDF Reports and Excel Workbooks – Center for Snow and Avalanche Studies

This CSAS Storms and Precip Data workbook contains WY2023 and the past 20 seasons of CSAS winter storm data, including:

Dates, times and duration of each winter storm event (2003-current)
Change in the height of snow at both our alpine Senator Beck study plot and our subalpine Swamp Angel site.
Peak gust data from our Putney site.
Mean and maximum precipitation intensity during each storm
Total new water accumulation in mm for each storm event.
Summary data for each month of the season.
Cumulative annual precipitation graph by month

See our Current Conditions for the latest hourly data. All times shown are in Mountain Standard Time (MST)

Past Winter Storm Reports:
2022-2023, 24 storms (pdf)
2020-2021, 15 storms (pdf)
2019-2020, 15 storms (pdf)
2018-2019, 15 storms (pdf)
2017-2018, 15 storms (pdf)
2016-2017, 28 storms (pdf)
2015-2016, 24 storms (pdf)
2014-2015, 18 storms (pdf)
2013-2014, 25 storms (pdf)

CSAS Storm Definition >= 12 mm SWE with no break in precipitation >12 hours
SASP =Swamp Angel Study Plot(11,060′, in sub-alpine meadow)
SBSP =Senator Beck Study Plot(12,186′, on alpine bench)
PTSP =Putney Study Plot(12,323′ alpine ridge ‘free air’ site)