North American English regional phonology


North American English regional phonology is the study of variations in the pronunciation of spoken North American English —what are commonly known simply as "regional accents". Though studies of regional dialects can be based on multiple characteristics, often including characteristics that are phonemic, phonetic, lexical, and syntactic, this article focuses only on the former two items. North American English includes American English, which has several highly developed and distinct regional varieties, along with the closely related Canadian English, which is more homogeneous geographically. American English and Canadian English have more in common with each other than with varieties of English outside North America.
The most recent work documenting and studying the phonology of North American English dialects as a whole is the 2006 Atlas of North American English by William Labov, Sharon Ash, and Charles Boberg, on which much of the description below is based, following on a tradition of sociolinguistics dating to the 1960s; earlier large-scale American dialectology focused more on lexicology than on phonology.

Overview

Regional dialects in North America are historically the most strongly differentiated along the Eastern seaboard, due to distinctive speech patterns of urban centers of the American East Coast like Boston, New York City, and certain Southern cities, all of these accents historically noted by their London-like r-dropping, a feature gradually receding among younger generations, especially in the South. The Connecticut River is now regarded as the southern and western boundary of the traditional New England accents, today still centered on Boston and much of Eastern New England. The Potomac River generally divides a group of Northeastern coastal dialects from an area of older Southeastern coastal dialects. All older Southern dialects, however, have mostly now receded in favor of a strongly rhotic, more unified accent group spread throughout the entire Southern United States since the late 1800s and into the early 1900s. In-between the two aforementioned rivers, some other variations exist, most famous among them being New York City English.
Outside of the Eastern seaboard, all other North American English has been firmly rhotic, since the very first arrival of English-speaking settlers. Rhoticity is a feature shared today with the English of Ireland, for example, rather than most of the English of England, which has become non-rhotic since the late 1700s. The sound of Western U.S. English, overall, is much more homogeneous than Eastern U.S. English. The interior and western half of the country was settled by people who were no longer closely connected to England, living farther from the British-influenced Atlantic Coast.
Certain particular vowel sounds are the best defining characteristics of regional North American English including any given speaker's presence, absence, or transitional state of the so-called cot–caught merger. Northeastern New England, Canadian, and Western Pennsylvania accents, as well as all accents of the Western U.S. have a merger of these and vowels, so that pairs of words like mock and talk, rod and clawed, or slot and bought rhyme. On the contrary, Philadelphia-Baltimore and New York metropolitan accents, plus inland accents of the Northern and Southern U.S., all strongly resist this merger, keeping the two sounds separate and thus maintaining an extra distinct vowel sound. The rest of the U.S. largely shows a transitional state of the merger, particularly the Midland dialect region, from Ohio to eastern Kansas.
Another prominent differentiating feature in regional North American English is fronting of the in words like goat, home, and toe and in words like goose, two, and glue. This fronting characterizes Midland, Mid-Atlantic, and Southern U.S. accents; these accents also front and raise the vowel, making yowl sound something like yeah-wool or even yale. Northern U.S. English, however, tends to keep all these vowels more backed. Southern and some Midland U.S. accents are often most quickly recognized by the weakening or deleting of the "glide" sound of the vowel in words like thyme, mile, and fine, making the word spy sound something like spa.
One phenomenon apparently unique to North American American accents is the irregular behavior of words that in the British English standard, Received Pronunciation, have . Words of this class include, among others: origin, Florida, horrible, quarrel, warren, borrow, tomorrow, sorry, and sorrow. In General American there is a split: the majority of these words have , but the last four words of the list above have . In Canada, all of these words are pronounced as . In the accents of Greater New York City, Philadelphia, and the Carolinas, most or all of these words are pronounced .

Classification of regional accents

Hierarchy of regional accents

Almost entirely based upon the findings and categorizations of the 2006 The Atlas of North American English, the following is one well-supported way to hierarchically classify North American English accents at the level of broad geographic regions, sub-regions, etc. Most of the rest of this article is organized according to this ANAE classification. Below, the accent represented by each branch, in addition to each of its own features, also contains all the features of the branch it extends from.
; Western
; North Central
; Inland Northern
; Midland
; WPA
; Southern
Variable rhoticity
; Mid-Atlantic
; NYC
; ENE
All regional Canadian English dialects, unless specifically stated otherwise, are rhotic, with the father–bother merger, cot–caught merger, and :/æ/ tensing|pre-nasal "short a" tensing. The broadest regional dialects include:
; Standard Canadian
; Atlantic Canadian

Chart of regional accents

Alternative classifications

Combining information from the phonetic research through interviews of Labov et al. in the ANAE and the phonological research through surveys of Vaux, Hedges performed a latent class analysis to generate six clusters, each with American English features that naturally occurred together and each expected to match up with one of these six broad U.S. accent regions: the North, the South, the West, New England, the Midland, and the Mid-Atlantic. The results showed that the accent regions/clusters were largely consistent with those outlined in the ANAE.
Below is a chart of particular pronunciations of particular words that have more than an 86% likelihood of occurring in a particular cluster. The defining pronunciations are: pajamas with either the phoneme or the phoneme ; coupon with either or ; Monday with either or ; Florida with either or other possibilities ; caramel with either two or three syllables; handkerchief with either or ; lawyer as either or ; poem with either one or two syllables; route with either or ; mayonnaise with either two or three syllables; and been with either or other possibilities. Parentheses in the chart indicate that the likelihood of the pronunciation inside them occurs overwhelmingly in a particular region but still does not meet the >86% threshold set by Hedges for what necessarily defines one of the six regional accents. Blank boxes in the chart indicate regions where neither pronunciation variant particularly dominates over the other; in some of these instances, the data simply may be inconclusive or unclear.
Presumed accent region pajamascouponMondayFloridacaramelhandkerchieflawyerpoemroutemayonnaisebeen
North2 syll.
South3 syll.2 syll.
West★
New England3 syll.3 syll.
Midland2 syll.★
Mid-Atlantic
& NYC		3 syll.

★ Hedges acknowledges that the two pronunciations marked by this star are discrepancies of her latent class analysis, since they conflict with Vaux 's surveys. Conversely, the surveys show that is the much more common vowel for pajamas in the West, and and are in fact both common variants for lawyer in the Midland.

General American

General American is an umbrella accent of American English perceived by many Americans to be "neutral" and free of regional characteristics. A General American accent is not a specific well-defined standard English in the way that Received Pronunciation has historically been the standard prestigious variant of the English language in England; rather, accents with a variety of features can all be perceived by Americans as "General American" so long as they lack certain sociolinguistically salient features: namely, that is, lacking regional features, ethnic features, or socioeconomic features.

Canada and Western United States

The English dialect region encompassing the Western United States and Canada is the largest one in North America and also the one with the fewest distinctive phonological features. This can be attributed to the fact that the West is the region most recently settled by English speakers, and so there has not been sufficient time for the region either to develop highly distinctive innovations or to split into strongly distinct dialectological subregions. The main phonological features of the Western U.S. and Canada are a completed cot-caught merger, a backed vowel, and a fronted vowel.

Atlantic Canada

The accents of Atlantic Canada are more marked than the accents of the whole rest of English-speaking Canada. English of this region broadly includes fronting and full Canadian raising, but no Canadian Shift.

Canada and Pacific Northwest

All of Canada, except the Atlantic Provinces and French-speaking Québec, speaks Standard Canadian English: the relatively uniform variety of North American English native to inland and western Canada, linguistically related to the Pacific Northwest, a region extending from British Columbia south into the Northwestern United States. The vowel is raised and diphthongized to or and as all before and, merging words like leg and lag ; tang is pronounced. The cot–caught merger to creates a hole in the short vowel sub-system and triggers a sound change known as the Canadian Shift, mainly found in Ontario, English-speaking Montreal, and further west, and led by Ontarians and women; it involves the front lax vowels,,. The of is retracted to , then and are lowered in the direction of and and/or retracted; the exact trajectory of the shift is still disputed. Increasing numbers of Canadians and Northwestern Americans have a feature called "Canadian raising", in which the nucleus of the diphthongs and are more "raised" before voiceless consonants. Thus for Canadians and Northwestern Americans, word pairs like pouter/powder and rider/writer are pronounced differently.
California, the most populated U.S. state, has been documented as having some notable new subsets of Western U.S. English. Some youthful urban Californians possess a vowel shift partly identical to the Canadian shift in its backing or lowering of each front vowel one space in the mouth. Before, is raised to, so king has the same vowel as keen rather than kin. Before may be identified with the phoneme, so rang is pronounced with the same vowel as ray. Elsewhere is lowered in the direction of. is moving towards, so put sounds more like putt. towards, so putt can sound slightly similar to pet. The vowel may be more fronted, i.e. and. The pin–pen merger is complete in Bakersfield and rural areas of the Central Valley, and speakers in Sacramento either perceive or produce an approximation of this merger.

Greater New York City

As in Eastern New England, the accents of New York City, Long Island, and adjoining New Jersey cities are traditionally non-rhotic, while other greater New York area varieties falling under the same sweeping dialect are usually rhotic or variably rhotic. Metropolitan New York shows the back and vowels of the North, but a fronted vowel. The vowels of cot and caught are distinct; in fact the New York dialect has perhaps the highest realizations of in North American English, even approaching or. Furthermore, the father vowel is traditionally kept distinct from either vowel, resulting in a three "lot-palm-father distinction".
The r-colored vowel of cart is back and often rounded, and not fronted as it famously is in Boston. New York City and its surrounding areas are also known for a complicated short-a split into lax versus tense, so that words, for example, like cast, calf, and cab have a different, higher, tenser vowel sound than cat, catch, and cap. The New York accent is well attested in American movies and television shows, often exaggerated, and especially ones about American mobsters from the area. Though it is sometimes known as a "Bronx" or "Brooklyn accent", no research has confirmed differences of accent between the city's boroughs.

Northern and North-Central United States

One vast super-dialectal area commonly identified by linguists is "the North", usually meaning New England, inland areas of the Mid-Atlantic states, and the North-Central States. There is no cot–caught merger in the North around the Great Lakes and southern New England, although the merger is in progress in the North-bordering Midland and is completed in northern New England, including as far down the Atlantic coast as Boston. The western portions of the North may also show a transitioning or completing cot-caught merger. The diphthong is, and remains a back vowel, as does and after non-coronal consonants. Indeed, in part of the North, remains back in all environments. Where the Southeast has the single word on, the North has. The Canadian raising of before voiceless consonants occurs is common in the North, and is becoming more common elsewhere in North America.

North

The traditional and linguistically conservative North includes being often raised or fronted, or both, as well as a firm resistance to the cot-caught merger. Maintaining these two features, but also developing several new ones, a younger accent of the North is now predominating at its center, around the Great Lakes and away from the Atlantic coast: the Inland North.

Inland North

The Inland North is a dialect region once considered the home of "standard Midwestern" speech that was the basis for General American in the mid-20th century. However, the Inland North dialect has been modified in the mid-1900s by the Northern Cities Vowel Shift, which is now the region's main outstanding feature, though it has been observed to be reversing at least in some areas, in particular with regards to raising before non-nasal consonants and fronting. The Inland North is centered on the area on the U.S. side of the Great Lakes, most prominently including central and western New York State, much of Michigan's Lower Peninsula, Toledo, Cleveland, Chicago, Gary, and southeastern Wisconsin, but broken up by the city of Erie, whose accent today is non-Inland Northern and even Midland-like. The NCS itself is not uniform throughout the Inland North; it is most advanced in Western New York and Michigan, and less developed elsewhere. The NCS is a chain shift involving movements of six vowel phonemes: the raising, tensing, and diphthongization of towards in all environments, then the fronting of to , then the lowering of towards , then the backing and sometimes lowering of, toward either or, then the backing and rounding of towards, so that, then lastly the lowering and backing of .

New England

New England does not form a single unified dialect region, but rather houses as few as four native varieties of English, with some linguists identifying even more. Only Southwestern New England neatly fits under the aforementioned definition of "the North". Otherwise, speakers, namely of Eastern New England, show very unusual other qualities. All of New England has a nasal short-a system, meaning that the short-a vowel most strongly raises before nasal consonants, as in much of the rest of the country.

Northeastern New England

The local and historical dialect of the coastal portions of New England, sometimes called Eastern New England English, now only encompasses Northeastern New England: Maine, New Hampshire, and eastern Massachusetts. The accents spoken here share the Canadian raising of as well as often, but they also possess the cot-caught merger, which is not associated with rest of "the North". Most famously, Northern New England accents are often non-rhotic. Some Northeastern New England accents are unique in North America for having resisted what is known as father–bother merger: in other words, the stressed vowel phonemes of father and bother remain distinct as and, so that the two words do not rhyme as they do in most American accents. Many Eastern New England speakers also once had a class of words with "broad a"—that is, as in father in words that in most accents contain, such as bath, half, and can't, similar to their pronunciation in London and southern England. The distinction between the vowels of horse and hoarse is maintained in traditional non-rhotic New England accents as for horse vs. for hoarse, though the horse–hoarse merger is certainly on the rise in the region today. The phoneme has highly distinct allophones before nasal consonants. fronting is usual.

Rhode Island

, dialectally identified as "Southeastern New England", is sometimes grouped with the Eastern New England dialect region, both by the dialectologists of the mid–20th century and in certain situations by the Atlas of North American English; it shares Eastern New England's traditional non-rhoticity. A key linguistic difference between Rhode Island and the rest of the Eastern New England, however, is that Rhode Island is subject to the father–bother merger and yet neither the cot–caught merger nor fronting. Indeed, Rhode Island shares with New York and Philadelphia an unusually high and back allophone of , even compared to other communities that do not have the cot–caught merger. In the Atlas of North American English, the city of Providence is also distinguished by having the backest realizations of,, and in North America. Therefore, Rhode Island English aligns in some features more with Boston English and other features more with New York City English.

Western New England

Recognized by research since the 1940s is the linguistic boundary between Eastern and Western New England, the latter settled from the Connecticut and New Haven colonies, rather than the Massachusetts Bay and Plymouth colonies. Western New Englanders settled most upstate New York the Inland North. Dialectological research has revealed some phonological nuances separating a Northwestern and Southwestern New England accent. Vermont, sometimes dialectally identified as "Northwestern New England", has the full cot-caught merger and fronting of Boston or Maine English, and yet none of the other marked features of Eastern New England, nor much evidence of the NCS, which is more robustly documented, though still variable, in Southwestern New England. Rhoticity predominates in all of Western New England, as does the father–bother merger of the rest of the nation. Southwestern New England merely forms a "less strong" extension of the Inland North dialect region, and it centers on Connecticut and western Massachusetts. It shows the same general phonological system as the Inland North, including variable elements of Northern Cities Vowel Shift —for instance, an that is somewhat higher and tenser than average, an that is fronter than, and so on. The caught–cot merger is approximated in western Massachusetts but usually still resisted in Connecticut. The "tail" of Connecticut may have some character diffused from New York City English.

North Central

The North Central or Upper Midwest dialect region of the United States extends from the Upper Peninsula of Michigan westward across northern Minnesota and North Dakota into the middle of Montana. Although the Atlas of North American English does not include the North Central region as part of the North proper, it shares all of the features listed above as properties of the North as a whole. The North Central is a linguistically conservative region; it participates in few of the major ongoing sound changes of North American English. Its vowels are frequently even monophthongs: and, respectively. The movie Fargo, which takes place in the North Central region, famously features strong versions of this accent. Unlike most of the rest of the North, the cot–caught merger is prevalent in the North Central region.

Southeastern United States

The 2006 Atlas of North American English identifies a "Southeastern super-region", in which all accents of the Southern States, as well as accents all along their regional margins, constitute a vast area of recent linguistic unity in certain respects: namely, the movement of four vowel sounds towards the center or front of the mouth, all of which is notably different from the accents of the Northern United States.
Essentially all of the modern-day Southern dialects, plus dialects marginal to the South, are thus considered a subset of this super-region: the whole American South, the southern half of the Mid- and South Atlantic regions, and a transitional Midland dialect area between the South and the North, comprising parts of Oklahoma, Kansas, Missouri, southeastern Nebraska, southern Illinois, southern Indiana, and southern Ohio.
These are the minimal necessary features that identify a speaker from the Southeastern super-region:
. There is also debate whether or not Austin, Texas is an exclusion. Based on.
A band of the United States from Pennsylvania west to the Great Plains is what twentieth-century linguists identified as the "Midland" dialect region, though this dialect's same features are now reported in certain other pockets of the country too. In older and traditional dialectological research, focused on lexicology rather than phonology, the Midland was divided into two discrete geographical subdivisions: the "North Midland" that begins north of the Ohio River valley area and, south of that, the "South Midland" dialect area. The North Midland region stretches from east-to-west across central and southern Ohio, central Indiana, central Illinois, Iowa, and northern Missouri, as well as Nebraska and Kansas where it begins to blend into the West. The South Midland dialect region follows the Ohio River in a generally southwesterly direction, moving across from Kentucky, southern Indiana, and southern Illinois to southern Missouri, Arkansas, southeastern Kansas, and Oklahoma, west of the Mississippi River. The distinction between a "North" versus "South Midland" was discarded in the 2006 Atlas of North American English, in which the former "North Midland" is now simply called "the Midland" and the "South Midland" is considered merely as the upper portion of "the South"; this ANAE reevaluation is primarily on the basis of phonology. The Midland is characterized by having a distinctly fronter realization of the phoneme than many other American accents, particularly those of the North; the phoneme is frequently realized with a central nucleus, approximating. Likewise, has a fronter nucleus than, approaching. Another feature distinguishing the Midland from the North is that the word on contains the phoneme rather than . For this reason, one of the names for the North-Midland boundary is the "on line". However, since the twentieth century, this area is currently undergoing a vowel merger of the "short o" and 'aw' phonemes, known as the cot-caught merger. Many speakers show transitional forms of the merger. The phoneme shows most commonly a so-called "continuous" distribution: is raised and tensed toward before nasal consonants, as in much of the country.

Midland outside the Midland

Atlanta, Georgia has been characterized by a massive movement of non-Southerners into the area during the 1990s, leading the city to becoming hugely inconsistent in terms of dialect. Currently, is variably monophthongized ; no complete cot–caught merger is reported; and the pin–pen merger is variable.
Charleston, South Carolina is an area where, today, most speakers have clearly conformed to a Midland regional accent, rather than any Southern accent. Charleston was once home to its own very locally-unique accent that encompassed elements of older British English while resisting Southern regional accent trends, perhaps with additional linguistic influence from French Huguenots, Sephardi Jews, and, due to Charleston's high concentration of African-Americans that spoke the Gullah language, Gullah African Americans. The most distinguishing feature of this now-dying accent is the way speakers pronounce the name of the city, to which a standard listener would hear "Chahlston", with a silent "r". Unlike Southern regional accents, Charlestonian speakers have never exhibited inglide long mid vowels, such as those found in typical Southern and.
Central and South Florida show no evidence of any type of glide deletion, Central Florida shows a pin–pen merger, and South Florida does not. Otherwise, Central and South Florida easily fit under the definition of the Midland dialect, including the cot-caught merger being transitional. In South Florida, particularly in and around Miami-Dade, Broward, and Monroe counties, a unique dialect, commonly called the "Miami accent", is widely spoken. The dialect first developed among second- or third-generation Hispanics, including Cuban-Americans, whose first language was English. Unlike the older Florida Cracker dialect, "Miami accent" is rhotic. It also incorporates a rhythm and pronunciation heavily influenced by Spanish.

Mid-Atlantic

The cities of the Mid-Atlantic States around the Delaware Valley are typically classified together, their speakers most popularly labelled as having a Philadelphia accent or a Baltimore accent. While Labov et al. state that the dialect could potentially be included in the Midland super-region, the dialect is not included in Midland proper as a result of distinct phonological features defining the dialect. The Mid-Atlantic split of into two separate phonemes, similar to but not exactly the same as New York City English, is one major defining feature of the dialect region, as is a resistance to the Mary–marry–merry merger and cot-caught merger, and a maintained distinction between historical short o and long o before intervocalic, so that, for example, orange, Florida, and horrible have a different stressed vowel than story and chorus; all of these features are shared between Mid-Atlantic American and New York City English. Other features include that water is sometimes pronounced, that is, with the vowel of wood; the single word on is pronounced not, so that, as in the South and Midland it rhymes with dawn rather than don; the of goat and boat is fronted, so it is pronounced, as in the advanced accents of the Midland and South. Canadian raising occurs for but not for .
According to linguist Barbara Johnstone, migration patterns and geography affected the Philadelphia dialect's development, which was especially influenced by immigrants from Northern England, Scotland, and Northern Ireland.

South

The Southern United States is often dialectally identified as "The South," as in ANAE. There is still great variation between sub-regions in the South and between older and younger generations. Southern American English as Americans popularly imagine began to take its current shape only after the beginning of the twentieth century. Some generalizations include: the conditional merger of and before nasal consonants, the pin–pen merger; the diphthong becomes monophthongized to ; lax and tense vowels often merge before. The South Midland dialect follows the Ohio River in a generally southwesterly direction, moves across Arkansas and some of Oklahoma west of the Mississippi, and peters out in West Texas; it also includes some of North Florida, namely around Jacksonville. It most noticeably has the loss of the diphthong, which becomes. It also shows fronting of initial vowel of to yielding ; nasalization of vowels, esp. diphthongs, before ; raising of to ; can't → cain't, etc.; fully rhoticity, unlike classical coastal varieties of older Southern American English, now mostly declined. In the Southern Vowel Shift of the early 1900s up to the present, moves to become a high front vowel, and to become a mid front unrounded vowel. In a parallel shift, the and relax and become less front; the back vowels in boon and in code shift considerably forward to and, respectively; and, the open back unrounded vowel in card shifts upward towards as in board, which in turn moves up towards the old location of in boon. This particular shift probably does not occur for speakers with the cot–caught merger. The lowering movement of the Southern Vowel Shift is also accompanied by a raising and "drawling" movement of vowels. The term Southern drawl has been used to refer to the diphthongization/triphthongization of the traditional short front vowels, as in the words pat, pet, and pit. these develop a glide up from their original starting position to, and then in some cases back down to schwa; thus: →, →, and →.

Inland South and Texas South

The ANAE identifies two important, especially advanced subsets of the South in terms of their leading the Southern Vowel Shift : the "Inland South" located in the southern half of Appalachia and the "Texas South," which only covers the north-central region of Texas, Odessa, and Lubbock, but not Abilene, El Paso, or southern Texas. One Texan distinction from the rest of the South is that all Texan accents have been reported as showing a pure, non-gliding vowel, and the identified "Texas South" accent, specifically, is at a transitional stage of the cot-caught merger; the "Inland South" accent of Appalachia, however, firmly resists the merger. Pronunciations of the Southern dialect in Texas may also show notable influence derived from an early Spanish-speaking population or from German immigrants.

Marginal Southeast

The following Southeastern super-regional locations do not cleanly fit into any of the aforementioned subsets of the Southeast, and may even be marginal-at-best members of the super-region itself:
Chesapeake and the Outer Banks islands are enclaves of a traditional "Hoi Toider" dialect, in which is typically backed and rounded. Many other features of phonological note exist here too; for example, Ocracoke, North Carolina shows no cot–caught merger and its monophthongs are diphthongized before /ʃ/ and /tʃ/ and Smith Island, Maryland shows an that is diphthongized and no happy tensing.
New Orleans, Louisiana has been home to a type of accent with parallels to the New York City accent reported for over a century. This variety of New Orleans English has been locally nicknamed "Yat" since at least the 1980s, from a traditional greeting "Where y'at". The Yat/NYC parallels include the split of the historic short-a class into tense and lax versions, as well as pronunciation of cot and caught as and. The stereotypical New York curl–coil merger of "toity-toid street" used to be a common New Orleans feature as well, though it has mostly receded today. One of the most detailed phonetic depictions of an extreme "yat" accent of the early 20th century is found in the speech of the character Krazy Kat in the comic strip of the same name by George Herriman. Such extreme accents still be found in parts of Mid-City and the 9th ward, Jefferson Parish, as well as in St. Bernard Parish, just east of New Orleans. The novel A Confederacy of Dunces by John Kennedy Toole often employs the Yat accent.
Oklahoma City, Oklahoma, according to the ANAE's research, is not quite a member of the Midland dialect region. Rather, its features seem to be a blend of the Western and Midland dialects. The overview of ANAE's studied features for Oklahoma City speakers include a conservative, conservative, transitional cot-caught merger, and variable pin–pen merger.
Savannah, Georgia once had a local accent that is now "giving way to regional patterns" of the Midland. According to the ANAE, there is much transition in Savannah, and the following features are reported as inconsistent or highly variable in the city: the Southern phenomenon of being monophthongized, non-rhoticity, fronting, the cot–caught merger, the pin–pen merger, and conservative .
St. Louis, Missouri is historically one among several Midland cities, but it is largely considered by ANAE to classify under blends of Inland North accents, with the Northern Cities Vowel Shift, and Midland accents. The "St. Louis Corridor" demonstrates this variability in speakers following a line formed by U.S. Route 66 in Illinois, going from Chicago southwest to St. Louis. This corridor of speakers cuts right through the center of what is otherwise the firmly-documented Midland region. Older St. Louisans demonstrate a card-cord merger, so that "I-44" is pronounced like "I farty-four". St. Louis resists the cot–caught merger and middle-aged speakers show the most advanced stages of the NCS, while maintaining many of the other Midland features.

Western Pennsylvania

The dialect of the western half of Pennsylvania is like the Midland proper in many features, including the fronting of and. The chief distinguishing feature of Western Pennsylvania as a whole is that the cot–caught merger is noticeably complete here, whereas it is still in progress in most of the Midland. The merger has also spread from Western Pennsylvania into adjacent West Virginia, historically in the South Midland dialect region. The city of Pittsburgh shows an especially advanced subset of Western Pennsylvania English, additionally characterized by a sound change that is unique in North America: the monophthongization of to. This is the source of the stereotypical Pittsburgh pronunciation of downtown as "dahntahn". Pittsburgh also features an unusually low allophone of ; it approaches .

Citations