<p><strong>> Duration:</strong> Dec. 22, 2009 - Dec. 29, 2009<br/> <strong>> Region:</strong> Northern Rockies and Plains<br/> <strong>> Affected area:</strong> 466,690 square miles<br/> <strong>> Population affected:</strong> 4.8 million<br/> <strong>> Notable snowfall:</strong> 15.7 inches (Osceola, NE)</p>

> Duration: Dec. 22, 2009 - Dec. 29, 2009
> Region: Northern Rockies and Plains
> Affected area: 466,690 square miles
> Population affected: 4.8 million
> Notable snowfall: 15.7 inches (Osceola, NE)

(Staff Sgt. Stacy Moless / U.S. Air Force)

The 25 Worst Blizzards Of All Time

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Unlike hurricanes and earthquakes, there is no widely used index for assessing the impact of snowstorms. In recent years, however, the meteorological community has made several successful attempts to establish a standard for measuring the impact of extreme snow events and their historical importance. The Regional Snowfall Index, introduced in 2014, ranks snowstorm impacts on a scale of 1 to 5 using data on a storm’s area of snowfall, the amount of snowfall, and the number of people living in the storm. The RSI has since been used to retroactively classify nearly 600 snowstorms.

To determine the worst blizzards of all time, 24/7 Wall St. ranked snowstorms based on their Regional Snowfall Index values, published by the National Oceanic and Atmospheric Administration’s National Centers for Environmental Information. We included the 25 snowstorms designated as Category 5 since 1900. Data on duration, region, affected area, and affected population also came from the NOAA. Data on affected area and population for Category 5 storms that spanned multiple regions were combined and considered one event. Storm names, as well as measures of snowfall in the affected areas, came from various news and media sources.

The 25 Worst Blizzards of All Time

<p>Blizzard activity in the U.S. has steadily increased in frequency over the last several decades. According to a recent study published in the January 2017 issue of the Journal of Applied Meteorology and Climate, the number of blizzards has climbed to about 22 as of 2014 from an average of six per season in 1959. The study also found that the area with the most blizzard activity is the northern Great Plains. North Dakota, sections of northern South Dakota and northwestern Minnesota have a more than a 60% chance of getting at least one blizzard a year.</p>

Blizzard activity in the U.S. has steadily increased in frequency over the last several decades. According to a recent study published in the January 2017 issue of the Journal of Applied Meteorology and Climate, the number of blizzards has climbed to about 22 as of 2014 from an average of six per season in 1959. The study also found that the area with the most blizzard activity is the northern Great Plains. North Dakota, sections of northern South Dakota and northwestern Minnesota have a more than a 60% chance of getting at least one blizzard a year.

(gremlin / Getty Images)

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25. The Chicago Blizzard of 1967

<p><strong>> Duration:</strong> Jan. 25, 1967 - Jan. 29, 1967<br/> <strong>> Region:</strong> Ohio Valley<br/> <strong>> Affected area:</strong> 286,503 square miles<br/> <strong>> Population affected:</strong> 46.1 million<br/> <strong>> Notable snowfall:</strong> 23 inches (Chicago, IL)</p><p><strong><a style="color:#008000" href="https://247wallst.com/special-report/2018/08/24/40-places-young-people-are-moving/?utm_source=tribune&utm_medium=referral&utm_campaign=tribune&utm_content=40-places-young-people-are-moving&wsrlui=85035891">ALSO READ: 40 Places Young People Are Moving</a></strong></p>

> Duration: Jan. 25, 1967 - Jan. 29, 1967
> Region: Ohio Valley
> Affected area: 286,503 square miles
> Population affected: 46.1 million
> Notable snowfall: 23 inches (Chicago, IL)

ALSO READ: 40 Places Young People Are Moving

(58follow / Wikimedia Commons)

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24. The Great Atlanta Blizzard

<p><strong>> Duration:</strong> Jan. 21, 1940 - Jan. 24, 1940<br/> <strong>> Region:</strong> Southeast<br/> <strong>> Affected area:</strong> 214,946 square miles<br/> <strong>> Population affected:</strong> 35.6 million<br/> <strong>> Notable snowfall:</strong> 21.6 inches (Richmond, VA)</p>

> Duration: Jan. 21, 1940 - Jan. 24, 1940
> Region: Southeast
> Affected area: 214,946 square miles
> Population affected: 35.6 million
> Notable snowfall: 21.6 inches (Richmond, VA)

(U.S. National Archives and Records Administration / Wikimedia Commons)

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23. The Blizzard of 1978

<p><strong>> Duration:</strong> Feb. 4, 1978 - Feb. 8, 1978<br/> <strong>> Region:</strong> Northeast<br/> <strong>> Affected area:</strong> 174,950 square miles<br/> <strong>> Population affected:</strong> 58.9 million<br/> <strong>> Notable snowfall:</strong> 55 inches (Lincoln, RI)</p><p><strong><a style="color:#008000" href="https://247wallst.com/special-report/2018/08/24/most-dangerous-countries-for-women/?utm_source=tribune&utm_medium=referral&utm_campaign=tribune&utm_content=most-dangerous-countries-for-women&wsrlui=85035892">ALSO READ: Most Dangerous Countries for Women</a></strong></p>

> Duration: Feb. 4, 1978 - Feb. 8, 1978
> Region: Northeast
> Affected area: 174,950 square miles
> Population affected: 58.9 million
> Notable snowfall: 55 inches (Lincoln, RI)

ALSO READ: Most Dangerous Countries for Women

(Dahoov2 / Wikimedia Commons)

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22. The Knickerbocker Storm

<p><strong>> Duration:</strong> Jan. 26, 1922 - Jan. 30, 1922<br/> <strong>> Region:</strong> Southeast<br/> <strong>> Affected area:</strong> 150,041 square miles<br/> <strong>> Population affected:</strong> 30.1 million<br/> <strong>> Notable snowfall:</strong> 28 inches (Washington, D.C.)</p>

> Duration: Jan. 26, 1922 - Jan. 30, 1922
> Region: Southeast
> Affected area: 150,041 square miles
> Population affected: 30.1 million
> Notable snowfall: 28 inches (Washington, D.C.)

(noaaphotolib / Flickr)

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21. The Blizzard of 1971

<p><strong>> Duration:</strong> Feb. 19, 1971 - Feb. 24, 1971<br/> <strong>> Region:</strong> South<br/> <strong>> Affected area:</strong> 261,324 square miles<br/> <strong>> Population affected:</strong> 10.5 million<br/> <strong>> Notable snowfall:</strong> N/A</p><p><strong><a style="color:#008000" href="https://247wallst.com/special-report/2018/08/24/worst-states-for-women/?utm_source=tribune&utm_medium=referral&utm_campaign=tribune&utm_content=worst-states-for-women&wsrlui=85035893">ALSO READ: Worst States for Women</a></strong></p>

> Duration: Feb. 19, 1971 - Feb. 24, 1971
> Region: South
> Affected area: 261,324 square miles
> Population affected: 10.5 million
> Notable snowfall: N/A

ALSO READ: Worst States for Women

(inkknife_2000 / Wikimedia Commons)

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20. The 2009 Christmas Blizzard

<p><strong>> Duration:</strong> Dec. 22, 2009 - Dec. 29, 2009<br/> <strong>> Region:</strong> Northern Rockies and Plains<br/> <strong>> Affected area:</strong> 466,690 square miles<br/> <strong>> Population affected:</strong> 4.8 million<br/> <strong>> Notable snowfall:</strong> 15.7 inches (Osceola, NE)</p>

> Duration: Dec. 22, 2009 - Dec. 29, 2009
> Region: Northern Rockies and Plains
> Affected area: 466,690 square miles
> Population affected: 4.8 million
> Notable snowfall: 15.7 inches (Osceola, NE)

(Staff Sgt. Stacy Moless / U.S. Air Force)

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19. The Blizzard of 1966

<p><strong>> Duration:</strong> Feb. 28, 1966 - Mar. 6, 1966<br/> <strong>> Region:</strong> Northern Rockies and Plains<br/> <strong>> Affected area:</strong> 466,796 square miles<br/> <strong>> Population affected:</strong> 4.8 million<br/> <strong>> Notable snowfall:</strong> 30.5 inches (Devils Lake, ND)</p><p><strong><a style="color:#008000" href="https://247wallst.com/special-report/2018/08/24/teams-with-the-most-hall-of-famers/?utm_source=tribune&utm_medium=referral&utm_campaign=tribune&utm_content=teams-with-the-most-hall-of-famers&wsrlui=85035894">ALSO READ: Teams With the Most Hall of Famers</a></strong></p>

> Duration: Feb. 28, 1966 - Mar. 6, 1966
> Region: Northern Rockies and Plains
> Affected area: 466,796 square miles
> Population affected: 4.8 million
> Notable snowfall: 30.5 inches (Devils Lake, ND)

ALSO READ: Teams With the Most Hall of Famers

(Public Domain / Wikimedia Commons)

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18. The Blizzard of 1920

<p><strong>> Duration:</strong> Apr. 15, 1920 - Apr. 19, 1920<br/> <strong>> Region:</strong> Northern Rockies and Plains<br/> <strong>> Affected area:</strong> 350,813 square miles<br/> <strong>> Population affected:</strong> 2.4 million<br/> <strong>> Notable snowfall:</strong> 28.3 inches (Denver, CO)</p>

> Duration: Apr. 15, 1920 - Apr. 19, 1920
> Region: Northern Rockies and Plains
> Affected area: 350,813 square miles
> Population affected: 2.4 million
> Notable snowfall: 28.3 inches (Denver, CO)

(Wikimedia Commons)

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17. The Historic Texas Snowstorm

<p><strong>> Duration:</strong> Dec. 19, 1929 - Dec. 24, 1929<br/> <strong>> Region:</strong> South<br/> <strong>> Affected area:</strong> 380,488 square miles<br/> <strong>> Population affected:</strong> 31.2 million<br/> <strong>> Notable snowfall:</strong> 26 inches (Hillsboro, TX)</p><p><strong><a style="color:#008000" href="https://247wallst.com/special-report/2018/08/24/25-companies-with-over-40-consecutive-years-of-dividend-hikes/?utm_source=tribune&utm_medium=referral&utm_campaign=tribune&utm_content=25-companies-with-over-40-consecutive-years-of-dividend-hikes&wsrlui=85035895">ALSO READ: 25 Companies With Over 40 Consecutive Years of Dividend Hikes</a></strong></p>

> Duration: Dec. 19, 1929 - Dec. 24, 1929
> Region: South
> Affected area: 380,488 square miles
> Population affected: 31.2 million
> Notable snowfall: 26 inches (Hillsboro, TX)

ALSO READ: 25 Companies With Over 40 Consecutive Years of Dividend Hikes

(Huron County Museum)

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16. The Blizzard of 1943

<p><strong>> Duration:</strong> Jan. 19, 1943 - Jan. 26, 1943<br/> <strong>> Region:</strong> Northern Rockies and Plains<br/> <strong>> Affected area:</strong> 358,424 square miles<br/> <strong>> Population affected:</strong> 3.1 million<br/> <strong>> Notable snowfall:</strong> 14.4 inches (Portland, OR)</p>

> Duration: Jan. 19, 1943 - Jan. 26, 1943
> Region: Northern Rockies and Plains
> Affected area: 358,424 square miles
> Population affected: 3.1 million
> Notable snowfall: 14.4 inches (Portland, OR)

(Seattle Municipal Archives / Wikimedia Commons)

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15. The Groundhog Day Blizzard

<p><strong>> Duration:</strong> Feb. 1, 2011 - Feb. 4, 2011<br/> <strong>> Region:</strong> Ohio Valley<br/> <strong>> Affected area:</strong> 241,595 square miles<br/> <strong>> Population affected:</strong> 41.3 million<br/> <strong>> Notable snowfall:</strong> 23.5 inches (Racine, WI)</p><p><strong><a style="color:#008000" href="https://247wallst.com/special-report/2018/08/23/least-fashionable-cities-in-america/?utm_source=tribune&utm_medium=referral&utm_campaign=tribune&utm_content=least-fashionable-cities-in-america&wsrlui=85035896">ALSO READ: Least Fashionable Cities in America</a></strong></p>

> Duration: Feb. 1, 2011 - Feb. 4, 2011
> Region: Ohio Valley
> Affected area: 241,595 square miles
> Population affected: 41.3 million
> Notable snowfall: 23.5 inches (Racine, WI)

ALSO READ: Least Fashionable Cities in America

(shamanic-shift / Flickr)

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14. The Blizzard of 1993

<p><strong>> Duration:</strong> Nov. 21, 1993 - Nov. 29, 1993<br/> <strong>> Region:</strong> Northern Rockies and Plains<br/> <strong>> Affected area:</strong> 468,083 square miles<br/> <strong>> Population affected:</strong> 4.8 million<br/> <strong>> Notable snowfall:</strong> NA</p>

> Duration: Nov. 21, 1993 - Nov. 29, 1993
> Region: Northern Rockies and Plains
> Affected area: 468,083 square miles
> Population affected: 4.8 million
> Notable snowfall: NA

(woodley wonderworks / Wikimedia Commons)

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13. The Post-Thanksgiving Day Storm of 1985

<p><strong>> Duration:</strong> Nov. 28, 1985 - Dec. 2, 1985<br/> <strong>> Region:</strong> Upper Midwest<br/> <strong>> Affected area:</strong> 251,618 square miles<br/> <strong>> Population affected:</strong> 23.9 million<br/> <strong>> Notable snowfall:</strong> 30 inches (Marquette, WI)</p><p><strong><a style="color:#008000" href="https://247wallst.com/special-report/2018/08/23/largest-industry-in-each-state-5/?utm_source=tribune&utm_medium=referral&utm_campaign=tribune&utm_content=largest-industry-in-each-state-5&wsrlui=85035897">ALSO READ: Largest Industry in Each State</a></strong></p>

> Duration: Nov. 28, 1985 - Dec. 2, 1985
> Region: Upper Midwest
> Affected area: 251,618 square miles
> Population affected: 23.9 million
> Notable snowfall: 30 inches (Marquette, WI)

ALSO READ: Largest Industry in Each State

(gremlin / Getty Images)

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12. The Blizzard of 1988

<p><strong>> Duration:</strong> Jan. 5, 1988 - Jan. 9, 1988<br/> <strong>> Region:</strong> South<br/> <strong>> Affected area:</strong> 369,821 square miles<br/> <strong>> Population affected:</strong> 22.3 million<br/> <strong>> Notable snowfall:</strong> 20 inches (Macon County, NC)</p>

> Duration: Jan. 5, 1988 - Jan. 9, 1988
> Region: South
> Affected area: 369,821 square miles
> Population affected: 22.3 million
> Notable snowfall: 20 inches (Macon County, NC)

(Rick Beacham / National Oceanic and Atmospheric Administration)

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11. The Blizzard of 1927, Southeastern United States

<p><strong>> Duration:</strong> Feb. 27, 1927 - Mar. 3, 1927<br/> <strong>> Region:</strong> Southeast<br/> <strong>> Affected area:</strong> 142,285 square miles<br/> <strong>> Population affected:</strong> 26.5 million<br/> <strong>> Notable snowfall:</strong> 30-40 inches (Wilson, NC)</p><p><strong><a style="color:#008000" href="https://247wallst.com/special-report/2018/08/23/towns-in-every-state-where-you-cant-get-to-the-hospital-in-time/?utm_source=tribune&utm_medium=referral&utm_campaign=tribune&utm_content=towns-in-every-state-where-you-cant-get-to-the-hospital-in-time&wsrlui=85035898">ALSO READ: Towns in Every State Where You May Not Get to the Hospital in Time</a></strong></p>

> Duration: Feb. 27, 1927 - Mar. 3, 1927
> Region: Southeast
> Affected area: 142,285 square miles
> Population affected: 26.5 million
> Notable snowfall: 30-40 inches (Wilson, NC)

ALSO READ: Towns in Every State Where You May Not Get to the Hospital in Time

(Public Domain)

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8. The Blizzard of 1996

<p><strong>> Duration:</strong> Jan. 6, 1996 - Jan. 9, 1996<br/> <strong>> Region:</strong> Southeast, Northeast<br/> <strong>> Affected area:</strong> 331,486 square miles<br/> <strong>> Population affected:</strong> 89.5 million<br/> <strong>> Notable snowfall:</strong> 26.6 inches (Baltimore, MD)</p>

> Duration: Jan. 6, 1996 - Jan. 9, 1996
> Region: Southeast, Northeast
> Affected area: 331,486 square miles
> Population affected: 89.5 million
> Notable snowfall: 26.6 inches (Baltimore, MD)

(kubina / Flickr)

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7. The Great Cold Outbreak of 1985

<p><strong>> Duration:</strong> Feb. 7, 1985 - Feb. 15, 1985<br/> <strong>> Region:</strong> Upper Midwest<br/> <strong>> Affected area:</strong> 252,012 square miles<br/> <strong>> Population affected:</strong> 23.9 million<br/> <strong>> Notable snowfall:</strong> N/A</p><p><strong><a style="color:#008000" href="https://247wallst.com/special-report/2018/08/23/names-that-are-disappearing-the-fastest/?utm_source=tribune&utm_medium=referral&utm_campaign=tribune&utm_content=names-that-are-disappearing-the-fastest&wsrlui=850358910">ALSO READ: Names That Are Disappearing the Fastest</a></strong></p>

> Duration: Feb. 7, 1985 - Feb. 15, 1985
> Region: Upper Midwest
> Affected area: 252,012 square miles
> Population affected: 23.9 million
> Notable snowfall: N/A

ALSO READ: Names That Are Disappearing the Fastest

(Wikimedia Commons)

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6. The Halloween Blizzard of 1991

<p><strong>> Duration:</strong> Oct. 31, 1991 - Nov. 4, 1991<br/> <strong>> Region:</strong> Upper Midwest<br/> <strong>> Affected area:</strong> 251,176 square miles<br/> <strong>> Population affected:</strong> 23.5 million<br/> <strong>> Notable snowfall:</strong> 28 inches (Twin Cities, MN)</p>

> Duration: Oct. 31, 1991 - Nov. 4, 1991
> Region: Upper Midwest
> Affected area: 251,176 square miles
> Population affected: 23.5 million
> Notable snowfall: 28 inches (Twin Cities, MN)

(curtrog / Getty Images)

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5. The Blizzard of 1921

<p><strong>> Duration:</strong> Feb. 18, 1921 - Feb. 22, 1921<br/> <strong>> Region:</strong> South<br/> <strong>> Affected area:</strong> 256,548 square miles<br/> <strong>> Population affected:</strong> 16.7 million<br/> <strong>> Notable snowfall:</strong> N/A</p><p><strong><a style="color:#008000" href="https://247wallst.com/special-report/2018/08/22/most-common-last-names-in-the-us-2/?utm_source=tribune&utm_medium=referral&utm_campaign=tribune&utm_content=most-common-last-names-in-the-us-2&wsrlui=850358911">ALSO READ: Most Common Last Names in the US</a></strong></p>

> Duration: Feb. 18, 1921 - Feb. 22, 1921
> Region: South
> Affected area: 256,548 square miles
> Population affected: 16.7 million
> Notable snowfall: N/A

ALSO READ: Most Common Last Names in the US

(Harris &amp Ewing / Wikimedia Commons)

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4. The 100-Hour Snowstorm of February 1969

<p><strong>> Duration:</strong> Feb. 22, 1969 - Feb. 28, 1969<br/> <strong>> Region:</strong> Northeast<br/> <strong>> Affected area:</strong> 174,950 square miles<br/> <strong>> Population affected:</strong> 58.9 million<br/> <strong>> Notable snowfall:</strong> 77 inches (Coos County, NH)</p>

> Duration: Feb. 22, 1969 - Feb. 28, 1969
> Region: Northeast
> Affected area: 174,950 square miles
> Population affected: 58.9 million
> Notable snowfall: 77 inches (Coos County, NH)

(Wikimedia Commons)

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3. The Blizzard of 1927, Northern Rockies

<p><strong>> Duration:</strong> Apr. 10, 1927 - Apr. 15, 1927<br/> <strong>> Region:</strong> Northern Rockies and Plains<br/> <strong>> Affected area:</strong> 335,119 square miles<br/> <strong>> Population affected:</strong> 2.1 million<br/> <strong>> Notable snowfall:</strong> N/A</p><p><strong><a style="color:#008000" href="https://247wallst.com/special-report/2018/08/22/terrifying-movies-based-on-true-events/?utm_source=tribune&utm_medium=referral&utm_campaign=tribune&utm_content=terrifying-movies-based-on-true-events&wsrlui=850358912">ALSO READ: Terrifying Movies Based on True Events</a></strong></p>

> Duration: Apr. 10, 1927 - Apr. 15, 1927
> Region: Northern Rockies and Plains
> Affected area: 335,119 square miles
> Population affected: 2.1 million
> Notable snowfall: N/A

ALSO READ: Terrifying Movies Based on True Events

(NOAA / Wikimedia Commons)

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2. The Great Appalachian Storm of 1950

<p><strong>> Duration:</strong> Nov. 22, 1950 - Nov. 30, 1950<br/> <strong>> Region:</strong> Ohio Valley<br/> <strong>> Affected area:</strong> 308,845 square miles<br/> <strong>> Population affected:</strong> 49.2 million<br/> <strong>> Notable snowfall:</strong> 57 inches (Central Appalachia)</p>

> Duration: Nov. 22, 1950 - Nov. 30, 1950
> Region: Ohio Valley
> Affected area: 308,845 square miles
> Population affected: 49.2 million
> Notable snowfall: 57 inches (Central Appalachia)

(Courtesy of Boston Public Library, Leslie Jones Collection)

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1. The White Hurricane

<p><strong>> Duration:</strong> Jan. 23, 1978 - Jan. 28, 1978<br/> <strong>> Region:</strong> Upper Midwest<br/> <strong>> Affected area:</strong> 233,580 square miles<br/> <strong>> Population affected:</strong> 23.6 million<br/> <strong>> Notable snowfall:</strong> 12.9 inches (Dayton, OH)</p><p><strong><a style="color:#008000" href="https://247wallst.com/special-report/2018/08/21/25-most-expensive-cities-to-move-to/?utm_source=tribune&utm_medium=referral&utm_campaign=tribune&utm_content=25-most-expensive-cities-to-move-to&wsrlui=850358913">ALSO READ: 25 Most Expensive Cities to Move To</a></strong></p>

> Duration: Jan. 23, 1978 - Jan. 28, 1978
> Region: Upper Midwest
> Affected area: 233,580 square miles
> Population affected: 23.6 million
> Notable snowfall: 12.9 inches (Dayton, OH)

ALSO READ: 25 Most Expensive Cities to Move To

(City of Boston Archives / Flickr)

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