United States

Articles and information related to the geography of the United States

Hurricane Ida just before landfall on the Louisiana coast on Aug. 29, 2021. NOAA.

How Did Ida Turn Into Such a Strong Hurricane?

Geo Contributor

Oceanographer Nick Shay explains how eddies, part of whatโ€™s known as the Loop Current, help storms rapidly intensify into monster hurricanes.

[Map of California shown as an island], Joan Vinckeboon, ca. 1650.

California as an Island

Caitlin Dempsey

Well into the 17th and 18th centuries, cartographers created maps of the region showing California separated from the mainland by a strait.

Satellite image showing the McKay Creek fire (left) and the Sparks Lake fire (right) on June 20, 2021 in British Columbia, Canada.

2021 Wildfires in the U.S. and Canada

Caitlin Dempsey

Climate change is causing wildfires to burn longer and more frequently in some northern latitudes.

Radar image showing the North American Monsoon over the interior Southwest.

North American Monsoon

Julian Marks

The North American Monsoon is a pattern of increased rainfall that occurs across much of the southwestern USA and northern Mexico, often commencing in July and ending in September.ย 

A bison cow with her calf. Photo: Jesse Achtenberg, U.S. Fish and Wildlife Service. Public domain

Geography of American Bison

Caitlin Dempsey

Learn about the American Bison, which once roamed North America in large herds.

Fact sheet with Landsat image for the state of Hawaii.

States in Order of Admission to the United States of America

Caitlin Dempsey

Learn the order in which each state was admitted to the United States as well as some geography facts.

Aerial view of the Shawnee Reservoir in Oklahoma.

Geography of Oklahoma

Marques Hayes

Oklahoma has a diverse geography.

McKinley Lake near Cordova, Alaska

Geography of U.S. Lakes

Elizabeth Borneman

Within its borders, the United States is home to a vast wealth of lakes.

Miners Castle, Lake Superior.

Geography of Lake Superior

Marques Hayes

Lake Superior is the world's largest freshwater lake.

Ghost Forest in North Carolinaโ€™s marshy Albemarle-Pamlico Peninsula. Image: Landsat 8, NASA, November 25, 2019.

Climate Change and the Expansion of Ghost Forests

Elizabeth Borneman

Along the geography of the East Coast of the United States, large swathes of forest are declining at increasing rates.

View of Lake Tahoe from Emerald Bay. Photo: NASA/JPL.

Largest Alpine Lake in North America

Caitlin Dempsey

Located in the Sierra Nevada mountain range, Lake Tahoe is a freshwater lake that straddles the border between California and Nevada.

Photo showing golf ball and baseball sized hail.

Geography of Hailstorms in the United States

Caitlin Dempsey

While hail can form anywhere in the United States experiencing a thunderstorm, geography influences where hailstorms are more likely to occur.

Map of drought conditions in the United States on March 23, 2021.

Half of the United States Will Continue to be Affected by Drought for Spring 2021

Caitlin Dempsey

Drought conditions in much of the United States are forecasted to continue for spring 2021.

Katmai Calder, Katmai National Park and Preserve, NPS, public domain.

The United States Ranks Third for Historically Active Volcanoes

Caitlin Dempsey

The United States ranks behind Indonesia and Japan for historically active volcanoes based on written records.

Tourist watch steam vent from Steamboat Geyser on Setpmber 4, 2014, the day after it erupted. Photo: Neal Herbert/NPS, public domain.

World’s Largest Active Geyser

Caitlin Dempsey

Located in the Norris Geyser Basin in Yellowstone National Park is Steamboat Geyser, the world's largest active geyser.

Plentiful rains leads to superblooms where the desert becomes blanketed with wildflowers. Photo: Death Valley, NPS, spring 2005.

Geography Facts About Death Valley

Caitlin Dempsey

Learn some interesting geography facts in this article about Death Valley.

Badwater Basin, Death Valley National Park. Photo: NPS, public domain.

The Lowest Point in Every U.S. State

Caitlin Dempsey

This article takes a look at the lowest elevation point in every state in the U.S.

Geography of Thanksgiving

Caitlin Dempsey

Each November, families in the United States gather to celebrate Thanksgiving.

A road sign on Interstate 19 just south of Tucson taken April 18, 2005. Photo: NicAgent, Wikimedia.

The Only Metric Highway in the United States

Caitlin Dempsey

Currently, only three countries in the world have not adopted the metric system as the standard: The United States, Myanmar, and Liberia.

Attu Island, Alaska, July 4, 2000. Source: NASA Terra Satellite, public domain.

This Island is the Westernmost Point of the United States

Caitlin Dempsey

Located towards the end of the Aleutian Island chain, this Alaskan island is the westernmost spot in the United States.

These Maps Show How Early Spring Arrived in Parts of the United States

Caitlin Dempsey

Spring arrived up to three to four weeks early in parts of the contiguous United States in 2020.

The National Weather Service in Miami recently issued a "falling iguana" warning during a cold spell.

Why Do Iguanas Drop From Trees When It’s Cold in Florida?

Caitlin Dempsey

Occasionally, the temperature in southern Florida approaches freezing, leading to falling iguanas.

Hoodoos at Bryce Canyon National Park. Photo: Bryce Canyon NPS, Public domain.

The World’s Highest Concentration of Hoodoos

Caitlin Dempsey

Hoodoos are tall, thin rock spires that occur all around the world.

How New York City is Protecting Its Subway System Against Flooding

Caitlin Dempsey

A flex-gate is a highly flexible covering that can be quickly deployed to protect a subway's entrance and underground structures in the event of a flood.

Hurricane Michael is the Fourth Category 5 Storm to Hit the United States

Caitlin Dempsey

Hurricane Michael was determined to be the fourth Category 5 storm to make landfall in the United States.

Geography of International Travel by U.S. Presidents

Caitlin Dempsey

So where have U.S. presidents traveled? ย This article explores the geography of international travel by sitting U.S. presidents.