100th meridian west

Line of longitude -100 The meridian 100° west of the Prime Meridian of Greenwich is a line of longitudeWhat is longitude? https://oceanservice.noaa.gov/facts/longitude.html oceanservice.noaa.gov 30 June 2025 en that extends from the North Pole across the Arctic Ocean, North America, the Pacific Ocean, the Southern Ocean, and Antarctica to the South Pole. The 100th meridian west forms a great circle with the 80th meridian east. In the United States, this meridian roughly marks the boundary between the semi-arid climate in the west and the humid continental and humid subtropical climates in the east, and as such roughly connotes the regions of the Eastern and the Western United States. From Pole to Pole Starting at the North Pole and heading south to the South Pole, the 100th meridian west passes through: {| class="wikitable plainrowheaders" ! scope="col" width="130" | Co-ordinates ! scope="col" | Country, territory or sea ! scope="col" | Notes |- | style="background:#b0e0e6;" | 90 0 N 100 0 W type:waterbody Arctic Ocean ! scope="row" style="background:#b0e0e6;" | Arctic Ocean | style="background:#b0e0e6;" | |- | 80 6 N 100 0 W type:country Canada ! scope="row" | | Nunavut — Meighen Island |- | style="background:#b0e0e6;" | 79 52 N 100 0 W type:waterbody Peary Channel ! scope="row" style="background:#b0e0e6;" | Peary Channel | style="background:#b0e0e6;" | |- | 78 44 N 100 0 W type:country Canada ! scope="row" | | Nunavut — Ellef Ringnes Island |- | style="background:#b0e0e6;" | 77 48 N 100 0 W type:waterbody ! scope="row" style="background:#b0e0e6;" | Unnamed waterbody | style="background:#b0e0e6;" | |- | 76 45 N 100 0 W type:country Canada ! scope="row" | | Nunavut — Berkeley Islands and Bathurst Island |- | style="background:#b0e0e6;" | 74 59 N 100 0 W type:waterbody Parry Channel ! scope="row" style="background:#b0e0e6;" | Parry Channel | style="background:#b0e0e6;" | |- | 73 57 N 100 0 W type:country Canada ! scope="row" | | Nunavut — Prince of Wales Island |- | style="background:#b0e0e6;" | 71 52 N 100 0 W type:waterbody M'Clintock Channel ! scope="row" style="background:#b0e0e6;" | M'Clintock Channel | style="background:#b0e0e6;" | |- | style="background:#b0e0e6;" | 70 35 N 100 0 W type:waterbody Larsen Sound ! scope="row" style="background:#b0e0e6;" | Larsen Sound | style="background:#b0e0e6;" | Passing just east of Gateshead Island, Nunavut, (at 70 35 N 100 9 W type:isle Gateshead Island) |- | style="background:#b0e0e6;" | 69 58 N 100 0 W type:waterbody Victoria Strait ! scope="row" style="background:#b0e0e6;" | Victoria Strait | style="background:#b0e0e6;" | |- | 69 3 N 100 0 W type:country_region:CA-NU Canada ! scope="row" | | Nunavut — Royal Geographical Society Islands |- | style="background:#b0e0e6;" | 68 57 N 100 0 W type:waterbody Queen Maud Gulf ! scope="row" style="background:#b0e0e6;" | Queen Maud Gulf | style="background:#b0e0e6;" | Passing just east of Hat Island, Nunavut, (at 68 18 N 100 2 W type:isle Hat Island) |-valign="top" | 67 50 N 100 0 W type:country_region:CA Canada ! scope="row" | | Nunavut Manitoba — from 60 0 N 100 0 W type:adm1st Manitoba, passing just west of Brandon |-valign="top" | 49 0 N 100 0 W type:adm1st_region:US-ND United States (North Dakota) ! scope="row" | | North Dakota South Dakota — from 45 56 N 100 0 W type:adm1st_region:US-SD South Dakota Nebraska — from 43 0 N 100 0 W type:adm1st_region:US-NE Nebraska Kansas — from 40 0 N 100 0 W type:adm1st_region:US-KS Kansas Oklahoma — from 37 0 N 100 0 W type:adm1st_region:US-OK Oklahoma Texas / Oklahoma border — from 36 30 N 100 0 W type:adm1st_region:US Texas / Oklahoma border Texas — from 34 34 N 100 0 W type:adm1st_region:US-TX Texas |-valign="top" | 28 0 N 100 0 W type:country_region:MX Mexico ! scope="row" | | Coahuila Nuevo León — from 27 37 N 100 0 W type:adm1st Nuevo León Tamaulipas — from 23 24 N 100 0 W type:adm1st Tamaulipas San Luis Potosí — from 23 10 N 100 0 W type:adm1st San Luis Potosí Tamaulipas — from 22 54 N 100 0 W type:adm1st Tamaulipas San Luis Potosí — from 22 50 N 100 0 W type:adm1st San Luis Potosí Guanajuato — from 21 30 N 100 0 W type:adm1st Guanajuato Querétaro — from 21 12 N 100 0 W type:adm1st Querétaro State of Mexico — from 20 6 N 100 0 W type:adm1st State of Mexico Guerrero — from 18 35 N 100 0 W type:adm1st Guerro, passing just west of Acapulco |- | style="background:#b0e0e6;" | 16 54 N 100 0 W type:waterbody Pacific Ocean ! scope="row" style="background:#b0e0e6;" | Pacific Ocean | style="background:#b0e0e6;" | |- | style="background:#b0e0e6;" | 60 0 S 100 0 W type:waterbody Southern Ocean ! scope="row" style="background:#b0e0e6;" | Southern Ocean | style="background:#b0e0e6;" | |- | 71 55 S 100 0 W type:country_region:AQ Antarctica ! scope="row" | Antarctica | Unclaimed territory |- |} United States thumb|left|Part of the state line between Texas and Oklahoma is defined by the 100th meridian west thumb|350px|Directors of the Union Pacific Railroad gather on the meridian in the Nebraska Territory at what is now Cozad, Nebraska, in 1866 250px|right|thumb|Sign marking the 100th meridian in Cozad, Nebraska; photograph taken 138 years after the preceding photograph in October 2004 In the United States the meridian 100° west of Greenwich forms the eastern border of the Texas panhandle with Oklahoma (which traces its origin to the Adams-Onís Treaty in 1819 which settled the border between New Spain and the United States between the Red River and Arkansas River). Dodge City, Kansas lies exactly at the intersection of the Arkansas River and the 100th meridian. As first noted by John Wesley Powell in the 1870s, there is a big difference in rainfall by the different sides of the meridian. In the central Great Plains, it roughly marks the western boundary of the normal reach of moist air from the Gulf of Mexico, and the approximate boundary (although some areas do push the boundary slightly farther east) between the semi-arid climate to the west and the humid continental (north of about 37°N) and humid subtropical (south of about 37°N) climates to the east. West of the meridian, raising livestock is much more economically important than east of it, and what agriculture does exist relies heavily on irrigation. Historically, the meridian has often been taken as a rough boundary between the eastern and western United States. White settlement, spreading westward after the American Civil War, settled the area around this meridian during the 1870s.August 2024 A sign across U.S. Highway 30 in Cozad, Nebraska, marks the place where the 100th meridian intersects with the routes of the Oregon Trail, Pony Express, transcontinental railroad, and the Lincoln Highway. In popular culture The song "At the Hundredth Meridian" by The Tragically Hip is about the 100th meridian west, specifically in Canada, and how it has traditionally been considered "where the Great Plains begin."Krajick Kevin The 100th Meridian, Where the Great Plains Begin, May Be Shifting 11 April 2018 https://news.climate.columbia.edu/2018/04/11/the-100th-meridian-where-the-great-plains-used-to-begin-now-moving-east/ Columbia Climate School September 8, 2023 3 west See also Rain follows the plow References External links https://www.earthmagazine.org/article/dividing-line-past-present-and-future-100th-meridian collapsed w100 meridian west Category:Borders of Oklahoma Category:Borders of Texas