Upper Colorado snowpack › San Juan › Upper San Juan
Upper San Juan snowpack
NRCS SNOTEL station 840 at 10,140 ft in Mineral County, Colorado, in the San Juan basin, with daily records since Oct 1, 1978. Latest reading Oct 29, 2026.
Snow water equivalent
180%
of the 1991–2020 median for this date · 69% of average
SWE today
0.9 in
median 0.5 in · average 1.3 in
Water-year precipitation
317%
of average since Oct 1 · 13 in vs. 4.1 in
Toward the normal peak
3%
of the average peak, 28.9 in around Apr 4
This water year against the normals
Water year 2027Water year 20261991–2020 median1991–2020 average
Water-year precipitation
Water year 2027Water year 20261991–2020 average
Peak snowpack by water year
Since 1981 this station's snowpack has peaked as high as 53.3 in (Apr 1, 2005) and as low as 11.2 in (Mar 24, 2002). The 1991–2020 average peak is 28.9 in around Apr 4.
| Water year | Peak SWE (in) | Peak date | % of normal peak | April 1 SWE (in) | Days of data |
|---|---|---|---|---|---|
| 2026 | 13.4 | Mar 6, 2026 | 46% | 4.2 | 365 |
| 2025 | 12.8 | Mar 20, 2025 | 44% | 10.7 | 365 |
| 2024 | 25.8 | Apr 6, 2024 | 89% | 24.8 | 335 |
| 2023 | 47.9 | Apr 3, 2023 | 166% | 47.3 | 365 |
| 2022 | 28.6 | Apr 4, 2022 | 99% | 27.6 | 358 |
| 2021 | 30 | Mar 28, 2021 | 104% | 30 | 365 |
| 2020 | 26.6 | Mar 30, 2020 | 92% | 26.6 | 366 |
| 2019 | 41.7 | Apr 14, 2019 | 144% | 40.7 | 365 |
| 2018 | 15.6 | Mar 29, 2018 | 54% | 15 | 365 |
| 2017 | 39.8 | Apr 4, 2017 | 138% | 38.5 | 365 |
| 2016 | 26.7 | Mar 30, 2016 | 92% | 26.7 | 366 |
| 2015 | 18.4 | Mar 7, 2015 | 64% | 14.4 | 365 |
| 2014 | 23.9 | Apr 4, 2014 | 83% | 23.3 | 365 |
| 2013 | 25.5 | Mar 12, 2013 | 88% | 24 | 365 |
| 2012 | 21.7 | Mar 19, 2012 | 75% | 17.7 | 366 |
| 2011 | 32.2 | May 3, 2011 | 111% | 30.5 | 365 |
| 2010 | 29.4 | Mar 14, 2010 | 102% | 27.3 | 365 |
| 2009 | 28.3 | Apr 17, 2009 | 98% | 26.2 | 365 |
| 2008 | 47.8 | Apr 13, 2008 | 165% | 46.2 | 366 |
| 2007 | 21.2 | Apr 24, 2007 | 73% | 18.7 | 365 |
| 2006 | 20.1 | Apr 7, 2006 | 70% | 18.4 | 365 |
| 2005 | 53.3 | Apr 1, 2005 | 184% | 53.3 | 365 |
| 2004 | 36.5 | Mar 8, 2004 | 126% | 30.7 | 366 |
| 2003 | 26.4 | Mar 22, 2003 | 91% | 25.8 | 365 |
| 2002 | 11.2 | Mar 24, 2002 | 39% | 9.3 | 365 |
| 2001 | 38.4 | Apr 22, 2001 | 133% | 32.7 | 365 |
| 2000 | 18.1 | Apr 2, 2000 | 63% | 18 | 366 |
| 1999 | 39.5 | May 4, 1999 | 137% | 29.3 | 365 |
| 1998 | 32.9 | Apr 19, 1998 | 114% | 27.7 | 365 |
| 1997 | 45.9 | Apr 13, 1997 | 159% | 42.1 | 365 |
| 1996 | 20.2 | Apr 18, 1996 | 70% | 18.7 | 366 |
| 1995 | 46.9 | May 8, 1995 | 162% | 44 | 365 |
| 1994 | 30 | Apr 11, 1994 | 104% | 25.9 | 365 |
| 1993 | 47.7 | Apr 14, 1993 | 165% | 46.2 | 365 |
| 1992 | 33.8 | Apr 6, 1992 | 117% | 33.6 | 366 |
| 1991 | 32.6 | Mar 29, 1991 | 113% | 32.6 | 365 |
| 1990 | 23.8 | May 3, 1990 | 82% | 16.7 | 365 |
| 1989 | 40.8 | Mar 4, 1989 | 141% | 37.3 | 365 |
| 1988 | 23.3 | Mar 17, 1988 | 81% | 22 | 366 |
| 1987 | 39 | Apr 12, 1987 | 135% | 35.9 | 365 |
| 1986 | 41.7 | Apr 26, 1986 | 144% | 35.4 | 365 |
| 1985 | 50.6 | Apr 29, 1985 | 175% | 48.3 | 365 |
| 1984 | 39.6 | May 6, 1984 | 137% | 35.1 | 366 |
| 1983 | 45.2 | Apr 21, 1983 | 156% | 42 | 365 |
| 1982 | 33.1 | Apr 3, 1982 | 115% | 31.8 | 365 |
| 1981 | 17.8 | Apr 5, 1981 | 62% | 16.6 | 365 |
Water years with fewer than 150 days of data are omitted. Data: NRCS National Water and Climate Center AWDB (station 840:CO:SNTL), pulled nightly; current-year values are provisional. Station location: 37.4856, -106.8353. Other stations in the San Juan basin are listed on the basin page.