User:KingLucarius/sandbox/Snowfall in Boulder, Colorado
Climatology
editWinter snowfall is a significant contributor to the annual precipitation of large portions of the overall dry and semi-arid climate that dominates large portions of Colorado. Boulder, Colorado is one such city, normally receiving around 92.8 inches (2367.3 mm) of snowfall throughout the autumn, winter and spring months of the year. Despite snowfall typically peaking in the early to mid-spring months of the year, specifically March; instances of measurable snowfall have been observed historically in every month of the calendar year except for July and August. Due to snowfall being practical for most of the year across higher elevations in the United States, no seasonal bounds for it are specified by the National Weather Service (NWS). However, totals listed below are reset to the following year on July 1, similarly to the seasonal bounds used by agencies for designating tropical cyclones in the Southern Hemisphere.
History & methodology
editBeginning in 1893, the National Weather Service and their Denver-Boulder (BOU) office began keeping archives of snowfall data in Colorado. This practice has continued into the present day with such archives available for several different locations across the state. For the purposes of this article, all listed data and information is be based upon the archives for Boulder, Colorado. Below are a set of tables depicting historical snowfall in the city; separated by season, their classifications relative to the 1991-2020 mean, and the criteria for said classifications.
Category | % of 1991-2020 normal |
Snowfall total |
---|---|---|
Normal | - | ~ 92.8" |
Extremely active | Above 150% | Above 139.2" |
Above normal | Above 114% | Above 105.8" |
Near normal | 85-114% | 78.9-105.8" |
Below normal | Below 85% | Below 78.9" |
Historical snowfall by season
editSeason | Snow | T | M | Avg. | Classification |
---|---|---|---|---|---|
2023-24 | 22.1 | 5 | 4 | 4.42 | Current season |
2022-23 | 80.9 | 31 | 23 | 2.61 | Near normal |
2021-22 | 88.7 | 26 | 20 | 3.412 | Near normal |
2020-21 | 103.3 | 35 | 24 | 2.951 | Near normal |
2019-20 | 152.0 | 25 | 21 | 6.08 | Extremely active |
2018-19 | 95.1 | 32 | 28 | 2.972 | Near normal |
2017-18 | 62.4 | 28 | 24 | 2.229 | Below normal |
2016-17 | 71.5 | 19 | 17 | 3.763 | Below normal |
2015-16 | 109.7 | 23 | 19 | 4.77 | Above normal |
2014-15 | 117.1 | 30 | 23 | 3.903 | Above normal |
2013-14 | 89.8 | 33 | 24 | 2.7 | Near normal |
2012-13 | 124.5 | 27 | 23 | 4.611 | Above normal |
2011-12 | 94.7 | 27 | 18 | 3.507 | Near normal |
2010-11 | 47.3 | 30 | 20 | 1.577 | Below normal |
2009-10 | 134.5 | 37 | 32 | 3.635 | Above normal |
2008-09 | 81.1 | 30 | 19 | 2.703 | Near normal |
2007-08 | 82.9 | 38 | 28 | 2.182 | Near normal |
2006-07 | 122.2 | 32 | 27 | 3.819 | Above normal |
2005-06 | 51.4 | 30 | 17 | 1.713 | Below normal |
2004-05 | 76.7 | 26 | 20 | 2.95 | Below normal |
2003-04 | 70.6 | 26 | 22 | 2.715 | Below normal |
2002-03 | 99.0 | 31 | 23 | 3.194 | Near normal |
2001-02 | 63.4 | 33 | 23 | 1.921 | Below normal |
2000-01 | 83.8 | 34 | 27 | 2.465 | Near normal |
1999-00 | 71.9 | 25 | 17 | 2.876 | Below normal |
1998-99 | 81.4 | 27 | 17 | 3.015 | Near normal |
1997-98 | 132.6 | 32 | 24 | 4.144 | Above normal |
1996-97 | 129.4 | 39 | 30 | 3.318 | Above normal |
1995-96 | 93.2 | Near normal | |||
1994-95 | 104.0 | Near normal | |||
1993-94 | 112.5 | Above normal | |||
1992-93 | 95.3 | Near normal | |||
1991-92 | 73.3 | Below normal | |||
1990-91 | 76.6 | Below normal | |||
1989-90 | 91.8 | Near normal | |||
1988-89 | 92.5 | Near normal | |||
1987-88 | 94.8 | Near normal | |||
1986-87 | 124.7 | Above normal | |||
1985-86 | 92.1 | Near normal | |||
1984-85 | 72.2 | Below normal | |||
1983-84 | 88.5 | Near normal | |||
1982-83 | 70.8 | Below normal | |||
1981-82 | 20.8 | Below normal | |||
1980-81 | 40.0 | Below normal | |||
1979-80 | 115.4 | Above normal | |||
1978-79 | 67.7 | Below normal | |||
1977-78 | 76.0 | Below normal | |||
1976-77 | 39.8 | Below normal | |||
1975-76 | 58.9 | Below normal | |||
1974-75 | 84.0 | Near normal | |||
1973-74 | 83.8 | Near normal | |||
1972-73 | 128.3 | Above normal | |||
1971-72 | 76.3 | Below normal | |||
1970-71 | 67.2 | Below normal | |||
1969-70 | 134.5 | Above normal | |||
1968-69 | 46.4 | Below normal | |||
1967-68 | 97.7 | Near normal | |||
1966-67 | 56.4 | Below normal | |||
1965-66 | 63.5 | Below normal | |||
1964-65 | 98.9 | Near normal | |||
1963-64 | 74.0 | Below normal | |||
1962-63 | 59.5 | Below Normal | |||
1961-62 | 81.5 | Near normal | |||
1960-61 | 74.5 | Below normal | |||
1959-60 | 90.8 | Near normal | |||
1958-59 | 101.5 | Near normal | |||
1957-58 | 70.4 | Below normal | |||
1956-57 | 103.2 | Near normal | |||
1955-56 | 84.7 | Near normal | |||
1954-55 | 72.0 | Below normal | |||
1953-54 | 63.6 | Below normal | |||
1952-53 | 89.0 | Near normal | |||
1951-52 | 85.3 | Near normal | |||
1950-51 | 96.9 | Near normal | |||
1949-50 | 54.7 | Below normal | |||
1948-49 | 91.4 | Near normal | |||
1947-48 | 109.7 | Above normal | |||
1946-47 | 137.0 | Above normal | |||
1945-46 | 52.8 | Below normal | |||
1944-45 | 87.3 | Near normal | |||
1943-44 | 105.3 | Near normal | |||
1942-43 | 70.0 | Below normal | |||
1941-42 | 76.5 | Below normal | |||
1940-41 | 72.5 | Below normal | |||
1939-40 | 73.5 | Below normal | |||
1938-39 | 87.7 | Near normal | |||
1937-38 | 76.7 | Below normal | |||
1936-37 | 64.9 | Below normal | |||
1936-36 | 60.9 | Below normal | |||
1934-35 | 42.9 | Below normal | |||
1933-34 | 57.1 | Below normal | |||
1932-33 | 75.2 | Below normal | |||
1931-32 | 52.6 | Below normal | |||
1930-31 | 98.9 | Near normal | |||
1929-30 | 78.1 | Below normal | |||
1928-29 | 65.2 | Below normal | |||
1927-28 | 63.5 | Below normal | |||
1926-27 | 50.0 | Below normal | |||
1925-26 | 75.8 | Below normal | |||
1924-25 | 21.5 | Below normal | |||
1923-24 | 73.3 | Below normal | |||
1922-23 | 70.7 | Below normal | |||
1921-22 | 43.1 | Below normal | |||
1920-21 | 62.0 | Below normal | |||
1919-20 | 90.3 | Near normal | |||
1918-19 | 52.9 | Below normal | |||
1917-18 | 34.3 | Below normal | |||
1916-17 | 103.3 | Near normal | |||
1915-16 | 66.7 | Below normal | |||
1914-15 | 64.2 | Below normal | |||
1913-14 | 104.9 | Near normal | |||
1912-13 | 62.9 | Below normal | |||
1911-12 | 68.3 | Below normal | |||
1910-11 | 55.6 | Below normal | |||
1909-10 | 80.5 | Near normal | |||
1908-09 | 142.9 | Extremely active | |||
1907-08 | 38.1 | Below normal | |||
1906-07 | 96.2 | Near normal | |||
1905-06 | 50.7 | Below normal | |||
1904-05 | 68.5 | Below normal | |||
1903-04 | 38.2 | Below normal | |||
1902-03 | 78.5 | Below normal | |||
1901-02 | 45.2 | Below normal | |||
1900-01 | 70.5 | Below normal | |||
1899-00 | 60.9 | Below normal | |||
1898-99 | 114.7 | Above normal | |||
1897-98 | 63.1 | Below normal | |||
1896-97 | ≥ 41.0 | Below normal | |||
1895-96 | N/A | Missing | |||
1894-95 | ≥ 42.5 | Below normal | |||
1893-94 | ≥ 23.0 | Below normal |
Snowiest single storms
editStorm | Season | Snowfall | Month |
---|---|---|---|
Xylia | 2020-21 | 21.3 | March |
Ruth | 2019-20 | 18.7 | April |
Dorothy | 2019-20 | 22.5 | November |
Yogi | 2012-13 | 20.5 | April |
Nixi | 2011-12 | 22.7 | February |
Six | 2009-10 | 23.0 | October |
Twenty-Five | 2008-09 | 20.4 | March |
Nine | 2006-07 | 26.0 | December |
Twenty-Four | 2002-03 | 22.5 | March |
Twenty-Four | 1997-98 | 20.8 | March |
Two | 1997-98 | 29.9 | October |
Thirty-Eight | 1996-97 | 19.8 | April |
Base timeline
edit![](http://upload.wikimedia.org/wikipedia/en/timeline/fcy31y65e8pskyzvjidw4suxa1zmhav.png)
Statistical MPI timeline
edit![](http://upload.wikimedia.org/wikipedia/en/timeline/gza3hzzpnutczfh1bs72jlmo01mjjiy.png)
2020-29
edit2023-24
edit![](http://upload.wikimedia.org/wikipedia/en/timeline/p796hu7zs8trynvcgzk6njv45r09wwx.png)
2022-23
edit![](http://upload.wikimedia.org/wikipedia/en/timeline/jszdxvd10wkjq9x1bc41738faa31ogk.png)
2021-22
edit![](http://upload.wikimedia.org/wikipedia/en/timeline/la5t8qv9lpbe5bi3bxgulvhbbtf4xpa.png)
2020-21
edit![](http://upload.wikimedia.org/wikipedia/en/timeline/jx3l471v404tjbj2vo5yodd5wzauhri.png)
2010-19
edit2019-20
edit![](http://upload.wikimedia.org/wikipedia/en/timeline/clsvoed4dlheodmylg72tulxw0utxib.png)
2018-19
edit![](http://upload.wikimedia.org/wikipedia/en/timeline/5cfw4qcdcug06sb99138soclffbci0m.png)
2017-18
edit![](http://upload.wikimedia.org/wikipedia/en/timeline/fv48b9jnk86ap5cibrsyjh31e898wke.png)
2016-17
edit![](http://upload.wikimedia.org/wikipedia/en/timeline/dz0nrvo4f5vpfp2de8i0jjti6rowvd1.png)
2015-16
edit![](http://upload.wikimedia.org/wikipedia/en/timeline/o11n3y1q5b3xyjdtaswtdmdtyvekmgo.png)
2014-15
edit![](http://upload.wikimedia.org/wikipedia/en/timeline/ba8u8ijalrfxotjqll0f95zhd4xgcjy.png)
2013-14
edit![](http://upload.wikimedia.org/wikipedia/en/timeline/5a8qdajdaflo5akkv820nfxgfylnstf.png)
2012-13
edit![](http://upload.wikimedia.org/wikipedia/en/timeline/tinuaoj37rxragopvvn200lpdgklo6x.png)
2011-12
edit![](http://upload.wikimedia.org/wikipedia/en/timeline/539elzp631ib109klo2dowahratqnn4.png)
2010-11
edit![](http://upload.wikimedia.org/wikipedia/en/timeline/djsuoxowuswgzkoa5co8786l3efwmnc.png)
2000-09
edit2009-10
edit![](http://upload.wikimedia.org/wikipedia/en/timeline/q3qhsygrezhslrqdhcn2oxiwaf8o76j.png)
2008-09
edit![](http://upload.wikimedia.org/wikipedia/en/timeline/ii1xucesu16nrhpuz89drpfe3enp0bk.png)
2007-08
edit![](http://upload.wikimedia.org/wikipedia/en/timeline/kszjyr6x8gq2btmwxadlzhs14n0cxfe.png)
2006-07
edit![](http://upload.wikimedia.org/wikipedia/en/timeline/746y2jvlpk4mrcdac4kmpllshuqiuw8.png)
2005-06
edit![](http://upload.wikimedia.org/wikipedia/en/timeline/1mr3j2sykpgzsd4o6rzqtcbgsjkshdg.png)
2004-05
edit![](http://upload.wikimedia.org/wikipedia/en/timeline/9f3u85mvwt56knm3e1oewapzqd0e4qm.png)
2003-04
edit![](http://upload.wikimedia.org/wikipedia/en/timeline/h1af0wiczfxoo5d0ahug6qqwfeeatvl.png)
2002-03
edit![](http://upload.wikimedia.org/wikipedia/en/timeline/4200ywgs4710je31vxmxd2rwfitmkbu.png)
2001-02
edit![](http://upload.wikimedia.org/wikipedia/en/timeline/ku86bu0ntw008oifh9012n64qx9mz6m.png)
2000-01
edit![](http://upload.wikimedia.org/wikipedia/en/timeline/0njcxbd7hbq8sbk473695rxp7yjlbpm.png)
1990-99
edit1999-00
edit![](http://upload.wikimedia.org/wikipedia/en/timeline/sg9pxbnn0rttzml2y663tv8p9oa8ptp.png)
1998-99
edit![](http://upload.wikimedia.org/wikipedia/en/timeline/g6gvmpxoox0hvz5jl1kesfxxzb0it9x.png)
1997-98
edit![](http://upload.wikimedia.org/wikipedia/en/timeline/87jwd3m0fy7xje04d5t7hm8ezwf5yn5.png)
1996-97
edit![](http://upload.wikimedia.org/wikipedia/en/timeline/sdbfkepoj1mmg24oaegvqj1o6zxgcn5.png)