#------------------------------------------------- WARNING -------------------------------------------- # # The data you have obtained from this automated Natural Resources Conservation Service # database are subject to revision regardless of indicated Quality Assurance level. # Data are released on condition that neither the NRCS nor the United States Government # may be held liable for any damages resulting from its use. # # SNOTEL air temperature data contains a known bias. This bias is rooted in the sensor # conversion equation and varies through the output range. Solutions are in development. # For more information go to Air Temperature Bias Correction. # # Help and Tutorials: https://www.nrcs.usda.gov/sites/default/files/2023-03/Report%20Generator%20Help%20Guide.pdf # Air Temperature Bias Correction: https://www.nrcs.usda.gov/wps/portal/wcc/home/snowClimateMonitoring/temperature/temperatureBiasCorrection/ # # Support Contact: usdafpacbc@servicenowservices.com # #------------------------------------------------------------------------------------------------------ # # Reporting Frequency: Monthly # Date Range: Period of Record # Report Instantaneous Data As: Start of Month # # Data for the following site(s) are contained in this file: # # SNOW COURSE/AERIAL MARKER 20K10: Donner Summit, CA # # Data items provided in this file: # # Element Name Value Type Function Type Function Duration Base Data Measurement Units Sensor Depth Element Code Description # Snow Water Equivalent Collection date None Instantaneous - Start of Month N/A Inches N/A WTEQ Depth of water that would theoretically result if the entire snowpack were melted instantaneously # Snow Depth Value None Instantaneous - Start of Month N/A Inches N/A SNWD Total snow depth # Snow Water Equivalent Value None Instantaneous - Start of Month N/A Inches N/A WTEQ Depth of water that would theoretically result if the entire snowpack were melted instantaneously # # Quality Control flags included: # # Flag Name Description # V Valid Validated Data # N No Profile No profile for automated validation # E Edit Edit, minor adjustment for sensor noise # B Back Estimate Regression-based estimate for homogenizing collocated Snow Course and Snow Pillow data sets # K Estimate Estimate # X External Estimate External estimate # S Suspect Suspect data # # Quality Assurance flags included: # # Flag Name Description # U Unknown Unknown # R Raw No Human Review # P Provisional Preliminary Human Review # A Approved Processing and Final Review Completed # #------------------------------------------------------------------------------------------------------ # # Donner Summit (20K10) # California SNOW COURSE/AERIAL MARKER Site - 6900 ft # Reporting Frequency: Monthly; Date Range: Period of Record # # As of: Dec 27, 2024, 6:43:47 AM GMT-08:00 # Water Year,Jan,Jan,Jan,Feb,Feb,Feb,Mar,Mar,Mar,Apr,Apr,Apr,May,May,May,Jun,Jun,Jun ,Snow Water Equivalent Collection Date Start of Month Values,Snow Depth (in) Start of Month Values,Snow Water Equivalent (in) Start of Month Values,Snow Water Equivalent Collection Date Start of Month Values,Snow Depth (in) Start of Month Values,Snow Water Equivalent (in) Start of Month Values,Snow Water Equivalent Collection Date Start of Month Values,Snow Depth (in) Start of Month Values,Snow Water Equivalent (in) Start of Month Values,Snow Water Equivalent Collection Date Start of Month Values,Snow Depth (in) Start of Month Values,Snow Water Equivalent (in) Start of Month Values,Snow Water Equivalent Collection Date Start of Month Values,Snow Depth (in) Start of Month Values,Snow Water Equivalent (in) Start of Month Values,Snow Water Equivalent Collection Date Start of Month Values,Snow Depth (in) Start of Month Values,Snow Water Equivalent (in) Start of Month Values 1910,,,,,,,,,,Apr 01,,29.4,,,,,, 1911,,,,,,,,,,Apr 01,,60.6,,,,,, 1912,,,,,,,,,,,,,,,,,, 1913,,,,,,,,,,Apr 01,,20.2,,,,,, 1914,,,,,,,,,,Apr 01,,66.5,,,,,, 1915,,,,,,,,,,Apr 01,86,40.0,,,,,, 1916,,,,,,,,,,Apr 01,139,67.1,,,,,, 1917,Dec 30,76,21.4,,,,,,,Apr 01,123,55.0,May 06,60,35.2,,, 1918,Jan 02,70,25.1,,,,Feb 26,77,20.3,Apr 09,66,32.9,Apr 30,36,16.0,,, 1919,,,,,,,,,,Apr 01,105,43.4,Apr 27,62,29.7,,, 1920,Dec 31,39,13.3,,,,Mar 05,68,26.3,Apr 01,75,29.9,May 13,36,18.2,,, 1921,,,,,,,,,,Mar 25,112,50.3,,,,,, 1922,Jan 01,56,18.0,Feb 01,72,24.2,Mar 01,145,50.6,Apr 01,152,60.4,,,,,, 1923,Jan 01,107,33.4,Feb 01,136,47.1,,,,Apr 01,82,38.4,,,,,, 1924,Jan 01,0,4.2,Feb 01,0,10.4,Mar 01,0,13.8,Apr 01,51,17.0,,,,,, 1925,Jan 01,0,10.1,Feb 01,0,14.5,Mar 01,83,28.7,Apr 01,73,26.9,May 03,48,22.7,,, 1926,Jan 01,0,4.2,Feb 01,0,18.5,Mar 01,0,28.3,Apr 01,38,17.6,,,,,, 1927,Jan 01,0,15.9,Feb 01,0,19.2,Mar 01,0,44.8,Apr 01,96,45.4,,,,,, 1928,Jan 04,40,11.1,Feb 01,48,15.4,,,,Apr 09,69,28.1,,,,,, 1929,Jan 04,40,11.6,Feb 01,48,15.4,,,,Apr 01,51,22.4,Apr 17,52,25.1,,, 1930,Jan 02,12,6.0,Feb 03,47,17.2,Mar 03,72,24.5,Mar 31,56,25.3,Apr 29,29,15.6,,, 1931,Jan 13,44,15.3,Jan 28,46,18.3,Feb 27,59,23.0,Mar 23,46,19.0,May 01,0,0.0,,, 1932,,,,Feb 04,135,48.1,Feb 28,110,49.3,Mar 29,92,50.5,May 02,70,35.9,May 30,19,11.1 1933,,,,Feb 05,81,25.7,Feb 27,74,27.6,Mar 29,89,36.2,May 06,49,23.9,May 28,29,17.6 1934,,,,Jan 27,54,22.1,Feb 27,75,24.6,Mar 26,36,18.1,May 01,0,0.0,,, 1935,,,,Jan 28,84,28.0,Feb 27,70,29.5,Apr 09,126,53.9,May 01,93,44.4,,, 1936,,,,Jan 28,73,27.7,Feb 28,137,49.4,Mar 27,97,43.6,Apr 28,72,35.3,May 18,26,14.5 1937,Jan 06,46,9.5,Feb 03,90,20.2,Feb 24,94,38.0,Mar 26,112,43.9,Apr 29,72,37.3,,, 1938,,,,Jan 26,35,11.6,Feb 28,123,45.1,Mar 28,163,67.8,May 03,121,59.3,,, 1939,,,,Jan 28,41,10.7,Feb 27,64,19.9,Mar 27,64,25.4,May 01,0,0.0,,, 1940,Jan 10,54,12.9,Jan 31,50,19.2,Mar 01,117,42.9,Apr 01,118,49.9,May 01,70,38.7,,, 1941,Jan 11,73,26.8,Jan 31,96,36.9,Mar 03,120,44.9,Mar 28,86,41.8,Apr 30,81,42.0,,, 1942,,,,Jan 30,82,26.2,Feb 27,107,41.1,Mar 26,93,42.6,May 01,82,38.9,,, 1943,,,,Feb 02,89,30.4,Mar 01,85,36.9,Apr 02,83,41.7,Apr 30,33,17.4,,, 1944,,,,Feb 01,51,14.5,Mar 01,106,27.6,Apr 01,65,31.2,May 01,55,29.4,,, 1945,,,,Feb 03,70,22.7,Feb 28,78,25.5,Mar 31,98,40.6,May 01,50,25.0,,, 1946,Dec 31,86,34.0,Feb 01,84,34.4,Mar 01,100,42.6,Apr 01,118,47.0,May 01,46,25.2,,, 1947,,,,Feb 03,55,16.5,Feb 28,49,18.7,Mar 31,70,28.7,May 03,12,5.2,,, 1948,,,,Jan 27,20,8.3,Feb 27,36,14.1,Mar 29,80,25.9,May 03,81,35.4,,, 1949,Jan 03,54,15.8,Jan 28,63,21.0,Feb 28,82,32.2,Mar 28,102,42.9,May 04,27,14.3,,, 1950,,,,Jan 27,72,26.6,Feb 28,85,41.1,Mar 28,116,50.4,May 03,99,40.9,,, 1951,,,,Jan 26,46,16.5,Feb 28,69,24.6,Mar 26,59,26.6,Apr 26,0,0.0,,, 1952,,,,Jan 29,156,59.6,Feb 27,173,73.3,Mar 28,185,81.4,May 06,108,60.7,,, 1953,,,,Jan 28,84,34.1,Feb 26,78,36.7,Mar 30,83,39.8,Apr 28,70,30.8,,, 1954,Jan 05,25,8.2,Jan 26,69,20.4,Feb 26,80,30.0,Mar 26,88,35.5,Apr 28,54,25.7,,, 1955,,,,Jan 27,79,27.2,Mar 03,89,33.4,Mar 31,72,32.6,Apr 27,92,36.4,,, 1956,,,,Jan 30,114,44.3,Feb 26,149,58.2,Mar 29,102,49.5,May 02,73,38.1,,, 1957,,,,Jan 29,49,16.0,Feb 27,61,26.7,Mar 27,72,34.1,Apr 29,52,26.4,,, 1958,,,,Jan 27,72,20.3,Feb 26,103,35.8,Mar 28,131,53.3,Apr 25,130,66.8,,, 1959,,,,Jan 26,37,10.8,Feb 26,75,26.8,Mar 31,57,25.2,Apr 28,0,0.0,,, 1960,,,,Feb 03,67,24.4,Feb 29,63,29.0,Mar 25,57,29.6,Apr 29,38,17.2,,, 1961,,,,Feb 02,39,14.5,Mar 01,40,16.1,Mar 29,69,26.5,Apr 27,37,13.8,,, 1962,,,,Jan 29,46,16.5,Mar 05,126,43.9,Mar 28,109,48.2,Apr 27,59,31.0,,, 1963,,,,Feb 01,0,0.0,Mar 01,0,0.0,Mar 25,26,6.3,Apr 24,75,28.3,,, 1964,Jan 02,27,8.4,Jan 29,80,24.6,Feb 27,58,23.2,Mar 26,78,31.7,May 07,44,16.5,,, 1965,,,,Jan 29,99,43.1,Feb 25,85,39.8,Apr 01,88,43.7,Apr 28,72,39.8,,, 1966,Jan 04,84,20.9,Jan 26,70,26.1,Mar 03,95,35.0,Mar 28,71,31.6,Apr 27,24,12.3,,, 1967,Jan 03,49,19.1,Jan 31,127,46.2,Feb 27,96,40.1,Mar 29,118,51.0,Apr 26,145,64.1,May 26,94,49.5 1968,Dec 28,43,14.6,Jan 25,46,18.2,Feb 26,63,27.9,Mar 27,68,30.9,Apr 25,33,12.5,,, 1969,Jan 02,68,21.9,Feb 07,152,58.1,Mar 04,191,75.1,Mar 26,153,71.9,Apr 28,126,67.6,May 29,31,17.8 1970,Dec 29,26,8.8,Jan 26,58,25.1,Feb 26,71,31.3,Apr 01,62,29.3,Apr 28,58,24.0,,, 1971,Jan 04,93,30.7,Jan 28,88,39.4,Feb 25,82,38.7,Mar 29,112,53.4,Apr 27,105,51.5,,, 1972,Dec 29,81,21.8,Jan 28,95,26.0,Feb 29,88,35.2,Mar 27,58,27.1,Apr 25,56,28.1,,, 1973,Dec 28,33,12.0,Jan 27,87,28.6,Feb 26,109,39.5,Mar 26,113,47.5,Apr 25,82,43.0,,, 1974,Jan 03,65,23.1,Jan 21,68,28.0,Feb 21,87,33.1,Mar 22,90,42.1,May 01,86,44.2,,, 1975,Jan 03,34,10.5,Jan 21,46,16.6,Feb 26,104,39.4,Mar 27,143,55.8,Apr 23,128,59.3,May 28,70,35.6 1976,Dec 29,12,3.6,Jan 26,17,4.7,Feb 25,33,11.4,Mar 24,37,14.6,Apr 26,20,8.8,,, 1977,Jan 05,30,5.1,Feb 01,17,5.0,Feb 24,30,8.2,Mar 28,31,11.5,May 02,0,0.0,,, 1978,Jan 06,86,25.0,Jan 25,110,40.7,Feb 21,127,51.7,Mar 23,121,57.2,Apr 28,111,56.1,May 23,58,29.3 1979,Jan 03,27,8.0,Jan 24,48,14.5,Feb 28,95,29.0,Mar 30,89,33.3,Apr 23,76,28.7,,, 1980,Jan 04,48,14.8,Jan 25,60,26.2,Feb 28,116,42.4,Mar 24,121,50.8,Apr 29,79,40.1,,, 1981,Dec 31,10,4.2,Jan 28,61,13.5,Feb 23,32,13.5,Mar 30,58,22.4,Apr 27,20,9.0,,, 1982,Jan 06,93,21.9,Jan 29,90,29.8,Feb 24,52,26.0,Apr 08,144,52.5,Apr 29,92,45.7,Jun 09,5,2.8 1983,Jan 03,87,31.0,Feb 01,124,40.6,Feb 22,138,55.4,Mar 28,184,87.2,May 02,169,80.8,,, 1984,Jan 03,53,23.0,Jan 30,67,27.8,Feb 27,96,39.3,Mar 27,79,27.3,Apr 25,34,16.4,,, 1985,Jan 02,53,19.4,Jan 28,57,19.8,Feb 26,62,25.8,Apr 03,76,34.8,Apr 25,42,20.6,May 21,0,0.0 1986,Jan 02,50,19.5,Jan 31,57,24.0,Feb 26,106,49.6,Apr 01,91,46.4,Apr 30,60,32.2,,, 1987,Jan 06,38,7.3,Feb 03,45,12.7,Feb 25,57,19.5,Mar 27,64,25.7,Apr 28,6,3.0,,, 1988,Jan 07,56,15.7,Jan 26,61,21.0,Feb 25,44,20.0,Mar 29,16,7.9,Apr 26,7,1.8,,, 1989,Jan 04,60,19.1,Jan 25,61,22.1,Feb 28,67,27.3,Mar 29,88,41.1,Apr 28,53,25.0,,, 1990,Jan 02,17,4.7,Jan 31,45,12.6,Feb 26,59,21.4,Mar 26,42,19.2,Apr 26,4,1.5,,, 1991,Jan 03,13,3.6,Feb 01,8,2.8,Mar 06,31,10.7,Mar 26,103,24.9,Apr 23,38,17.8,May 28,3,1.1 1992,Dec 22,21,5.8,Jan 27,27,9.0,Feb 27,58,19.8,Mar 26,45,19.4,Apr 28,0,0.0,,, 1993,Jan 03,95,27.5,Jan 25,113,43.4,Mar 01,153,63.1,Apr 01,121,62.5,Apr 27,98,52.0,,, 1994,Dec 29,35,11.3,Jan 29,42,12.9,Feb 23,91,25.1,Mar 28,42,18.9,May 02,5,2.2,,, 1995,Jan 04,70,23.4,Jan 31,121,51.8,Feb 27,100,49.8,Mar 30,156,72.6,May 03,132,72.5,May 25,106,58.5 1996,Jan 02,11,5.0,Jan 29,63,22.4,Feb 26,76,30.8,Mar 25,68,35.0,Apr 29,55,29.6,,, 1997,Jan 10,47,20.9,Jan 29,113,41.2,Feb 26,90,45.0,Mar 27,62,30.6,Apr 28,15,9.9,,, 1998,,,,Jan 26,67,27.9,Feb 23,138,46.3,Mar 27,102,52.0,,,,,, 1999,,,,Jan 29,72,29.3,Feb 23,143,50.2,Mar 29,102,48.1,,,,,, 2000,,,,Feb 01,61,20.0,Mar 02,107,39.6,Mar 29,77,37.6,,,,,, 2001,,,,Jan 31,54,11.7,Feb 28,3,20.7,Mar 26,45,20.2,Apr 27,24,11.4,,, 2002,,,,Feb 02,76,26.8,Feb 28,64,29.2,Mar 27,84,38.0,Apr 29,47,20.4,,, 2003,,,,Jan 29,48,19.9,Feb 27,54,23.4,Mar 27,44,22.0,Apr 29,69,27.8,,, 2004,,,,Jan 28,79,29.0,Mar 02,111,38.5,Mar 31,60,29.3,Apr 27,23,13.2,,, 2005,,,,Jan 31,83,32.0,Feb 24,75,32.5,Mar 30,107,43.1,May 02,70,35.4,,, 2006,,,,Feb 02,56,19.2,Feb 23,46,18.1,Apr 07,109,41.8,Apr 25,108,47.7,,, 2007,,,,Jan 30,26,10.1,Mar 03,82,23.2,Mar 29,42,15.3,Apr 25,19,7.5,,, 2008,,,,Feb 04,98,30.0,Feb 28,96,36.0,Apr 01,68,32.8,Apr 29,26,14.0,,, 2009,,,,Jan 28,35,11.8,Mar 03,92,30.7,Apr 02,68,31.8,Apr 30,38,17.1,,, 2010,,,,Feb 01,76,24.0,Feb 28,85,31.1,Mar 30,82,33.7,May 03,73,34.1,,, 2011,,,,Jan 27,63,26.2,Mar 01,108,42.2,Mar 29,179,66.4,May 02,118,56.0,May 31,87,41.8 2012,,,,Jan 25,26,6.4,Feb 28,23,4.6,Mar 26,46,17.2,Apr 25,33,13.9,,, 2013,Jan 28,45,17.3,Jan 28,45,17.3,Feb 25,39,17.0,Mar 25,32,14.4,Apr 24,2,0.9,,, 2014,,,,Jan 27,1,0.5,Feb 25,11,4.0,Mar 27,17,4.0,Apr 24,2,0.5,,, 2015,,,,Jan 27,8,3.0,Feb 25,2,1.0,Mar 25,0,0.5,Apr 27,1,0.5,,, 2016,,,,Jan 26,74,26.0,Feb 25,59,26.5,Mar 28,78,28.5,Apr 25,42,19.0,,, 2017,,,,Jan 30,104,33.5,Mar 02,138,47.5,Mar 28,128,58.5,Apr 24,114,57.5,,, 2018,,,,Jan 25,22,2.5,Feb 22,14,1.0,Mar 26,52,10.0,Apr 24,14,6.0,,, 2019,,,,Jan 30,67,25.0,Feb 27,161,56.5,Mar 25,140,62.0,Apr 25,104,51.0,,, 2020,,,,Jan 27,53,18.5,Feb 25,35,13.5,Apr 02,56,20.5,Apr 27,30,13.5,,, 2021,,,,Jan 25,26,9.5,Feb 22,67,24.5,Mar 25,72,29.5,Apr 28,8,4.5,,, 2022,,,,Feb 01,62,28.0,Feb 28,46,20.5,Mar 30,28,13.0,Apr 28,20,9.0,,, 2023,,,,Jan 25,101,35.5,Feb 22,96,38.5,Mar 27,160,68.0,Apr 25,124,62.5,,, 2024,,,,Jan 25,38,18.5,Feb 27,64,23.0,Mar 25,88,35.0,May 01,46,21.5,,, 2025,,,,,,,,,,,,,,,,,,