Upper Colorado snowpack › Colorado Headwaters › Chapman Tunnel
Chapman Tunnel snowpack
NRCS SNOTEL station 1101 at 10,090 ft in Pitkin County, Colorado, in the Colorado Headwaters basin, with daily records since Sep 6, 2007. Latest reading Oct 29, 2026.
Snow water equivalent
9%
of the 1991–2020 median for this date · 10% of average
SWE today
0.1 in
median 1.1 in · average 1 in
Water-year precipitation
74%
of average since Oct 1 · 1.7 in vs. 2.3 in
Toward the normal peak
1%
of the average peak, 14 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 2008 this station's snowpack has peaked as high as 23.3 in (Apr 16, 2008) and as low as 7.8 in (Mar 7, 2026). The 1991–2020 average peak is 14 in around Apr 4.
| Water year | Peak SWE (in) | Peak date | % of normal peak | April 1 SWE (in) | Days of data |
|---|---|---|---|---|---|
| 2026 | 7.8 | Mar 7, 2026 | 56% | 4.3 | 365 |
| 2025 | 13.5 | Apr 6, 2025 | 96% | 13.1 | 365 |
| 2024 | 17.2 | Apr 1, 2024 | 123% | 17.2 | 366 |
| 2023 | 15.8 | Mar 31, 2023 | 113% | 15.8 | 365 |
| 2022 | 15.5 | Apr 13, 2022 | 111% | 14.6 | 365 |
| 2021 | 13.2 | Mar 31, 2021 | 94% | 13.2 | 365 |
| 2020 | 16.9 | Apr 23, 2020 | 121% | 15.7 | 366 |
| 2019 | 19.5 | Apr 2, 2019 | 139% | 19.4 | 365 |
| 2018 | 12.7 | Apr 21, 2018 | 91% | 10.5 | 365 |
| 2017 | 16.4 | Mar 7, 2017 | 117% | 15.3 | 365 |
| 2016 | 15.2 | Apr 19, 2016 | 109% | 14.2 | 366 |
| 2015 | 11.6 | Mar 25, 2015 | 83% | 10.6 | 365 |
| 2014 | 16.4 | Apr 16, 2014 | 117% | 15.4 | 365 |
| 2013 | 12.5 | Apr 23, 2013 | 89% | 9.1 | 365 |
| 2012 | 8.9 | Mar 21, 2012 | 64% | 5.9 | 366 |
| 2011 | 22.1 | May 2, 2011 | 158% | 17.1 | 365 |
| 2010 | 11.5 | Apr 7, 2010 | 82% | 10.4 | 365 |
| 2009 | 15.4 | Apr 17, 2009 | 110% | 14.4 | 365 |
| 2008 | 23.3 | Apr 16, 2008 | 166% | 21.6 | 366 |
Water years with fewer than 150 days of data are omitted. Data: NRCS National Water and Climate Center AWDB (station 1101:CO:SNTL), pulled nightly; current-year values are provisional. Station location: 39.2621, -106.6294. Other stations in the Colorado Headwaters basin are listed on the basin page.