Utah

Utah is a state in the western United States. It became the 45th state admitted to the Union on January 4, 1896. Utah is the 13th-largest, the 31st-most populous, and the 10th-least-densely populated of the 50 United States. Utah has a population of nearly 3 million (Census estimate for July 1, 2015), approximately 80% of whom live along the Wasatch Front, centering on the state capital Salt Lake City. Utah is bordered by Colorado to the east, Wyoming to the northeast, Idaho to the north, Arizona to the south, and Nevada to the west. It also touches a corner of New Mexico in the southeast.

Approximately 62% of Utahns are reported to be members of The Church of Jesus Christ of Latter-day Saints or LDS (Mormons), which greatly influences Utah culture and daily life (although only 41.6% are active members of the faith). The LDS Church’s world headquarters is located in Salt Lake City. Utah is the only state with a majority population belonging to a single church.

The state is a center of transportation, education, information technology and research, government services, mining, and a major tourist destination for outdoor recreation. In 2013, the U.S. Census Bureau estimated that Utah had the second fastest-growing population of any state. St. George was the fastest–growing metropolitan area in the United States from 2000 to 2005. Utah also has the 14th highest median average income and the least income inequality of any U.S. state. A 2012 Gallup national survey found Utah overall to be the “best state to live in” based on 13 forward-looking measurements including various economic, lifestyle, and health-related outlook metrics.

Geography

Utah is known for its natural diversity and is home to features ranging from arid deserts with sand dunes to thriving pine forests in mountain valleys. It is a rugged and geographically diverse state that is located at the convergence of three distinct geological regions: the Rocky Mountains, the Great Basin, and the Colorado Plateau.

Utah is one of the Four Corners states, and is bordered by Idaho in the north, Wyoming in the north and east; by Colorado in the east; at a single point by New Mexico to the southeast; by Arizona in the south; and by Nevada in the west. It covers an area of 84,899 sq mi (219,890 km²). The state is one of only three U.S. states (with Colorado and Wyoming) that have only lines of latitude and longitude for boundaries.

One of Utah’s defining characteristics is the variety of its terrain. Running down the middle of the northern third of the state is the Wasatch Range, which rises to heights of almost 12,000 ft (3,700 m) above sea level. Utah is home to world-renowned ski resorts, made popular by the light, fluffy snow, and winter storms which regularly dump 1 to 3 feet of overnight snow accumulation. In the northeastern section of the state, running east to west, are the Uinta Mountains, which rise to heights of over 13,000 feet (4,000 m). The highest point in the state, Kings Peak, at 13,528 feet (4,123 m), lies within the Uinta Mountains.

At the western base of the Wasatch Range is the Wasatch Front, a series of valleys and basins that are home to the most populous parts of the state. It stretches approximately from Brigham City at the north end to Nephi at the south end. Approximately 75 percent of the population of the state live in this corridor, and population growth is rapid.

Western Utah is mostly arid desert with a basin and range topography. Small mountain ranges and rugged terrain punctuate the landscape. The Bonneville Salt Flats are an exception, being comparatively flat as a result of once forming the bed of ancient Lake Bonneville. Great Salt Lake, Utah Lake, Sevier Lake, and Rush Lake are all remnants of this ancient freshwater lake, which once covered most of the eastern Great Basin. West of the Great Salt Lake, stretching to the Nevada border, lies the arid Great Salt Lake Desert. One exception to this aridity is Snake Valley, which is (relatively) lush due to large springs and wetlands fed from groundwater derived from snow melt in the Snake Range, Deep Creek Range, and other tall mountains to the west of Snake Valley. Great Basin National Park is just over the Nevada state line in the southern Snake Range. One of western Utah’s most impressive, but least visited attractions is Notch Peak, the tallest limestone cliff in North America, located west of Delta.

Much of the scenic southern and southeastern landscape (specifically the Colorado Plateau region) is sandstone, specifically Kayenta sandstone and Navajo sandstone. The Colorado River and its tributaries wind their way through the sandstone, creating some of the world’s most striking and wild terrain (the area around the confluence of the Colorado and Green Rivers was the last to be mapped in the lower 48 United States). Wind and rain have also sculpted the soft sandstone over millions of years. Canyons, gullies, arches, pinnacles, buttes, bluffs, and mesas are the common sight throughout south-central and southeast Utah.

Climate

Joshua Trees, yucca plants, and jumping cholla cactus occupy the far southwest corner of the state in the Mojave Desert

Utah features a dry, semi-arid to desert climate, although its many mountains feature a large variety of climates, with the highest points in the Uinta Mountains being above the timberline. The dry weather is a result of the state’s location in the rain shadow of the Sierra Nevada in California. The eastern half of the state lies in the rain shadow of the Wasatch Mountains. The primary source of precipitation for the state is the Pacific Ocean, with the state usually lying in the path of large Pacific storms from October to May. In summer, the state, especially southern and eastern Utah, lies in the path of monsoon moisture from the Gulf of California.

Most of the lowland areas receive less than 12 inches (305 mm) of precipitation annually, although the I-15 corridor, including the densely populated Wasatch Front, receives approximately 15 inches (381 mm). The Great Salt Lake Desert is the driest area of the state, with less than 5 inches (127 mm). Snowfall is common in all but the far southern valleys. Although St. George only receives about 3 inches (8 cm) per year, Salt Lake City sees about 60 inches (152 cm), enhanced by the lake-effect snow from the Great Salt Lake, which increases snowfall totals to the south, southeast, and east of the lake.

Some areas of the Wasatch Range in the path of the lake-effect receive up to 500 inches (1,270 cm) per year. The consistently deep powder snow led Utah’s ski industry to adopt the slogan “the Greatest Snow on Earth” in the 1980s. In the winter, temperature inversions are a common phenomenon across Utah’s low basins and valleys, leading to thick haze and fog that can sometimes last for weeks at a time, especially in the Uintah Basin. Although at other times of year its air quality is good, winter inversions give Salt Lake City some of the worst wintertime pollution in the country.

Previous studies have indicated a widespread decline in snowpack over Utah accompanied by a decline in the snow–precipitation ratio while anecdotal evidence claims have been put forward that measured changes in Utah’s snowpack are spurious and do not reflect actual change. A 2012 study found that the proportion of winter (January–March) precipitation falling as snow has decreased by 9% during the last half century, a combined result from a significant increase in rainfall and a minor decrease in snowfall. Meanwhile, observed snow depth across Utah has decreased and is accompanied by consistent decreases in snow cover and surface albedo. Weather systems with the potential to produce precipitation in Utah have decreased in number with those producing snowfall decreasing at a considerably greater rate.

Utah’s temperatures are extreme, with cold temperatures in winter due to its elevation, and very hot summers statewide (with the exception of mountain areas and high mountain valleys). Utah is usually protected from major blasts of cold air by mountains lying north and east of the state, although major Arctic blasts can occasionally reach the state. Average January high temperatures range from around 30 °F (−1 °C) in some northern valleys to almost 55 °F (13 °C) in St. George.

Temperatures dropping below 0 °F (−18 °C) should be expected on occasion in most areas of the state most years, although some areas see it often (for example, the town of Randolph averages about 50 days per year with temperatures dropping that low). In July, average highs range from about 85 to 100 °F (29 to 38 °C). However, the low humidity and high elevation typically leads to large temperature variations, leading to cool nights most summer days. The record high temperature in Utah was 118 °F (48 °C), recorded south of St. George on July 4, 2007, and the record low was −69 °F (−56 °C), recorded at Peter Sinks in the Bear River Mountains of northern Utah on February 1, 1985. However, the record low for an inhabited location is −49 °F (−45 °C) at Woodruff on December 12, 1932.

Utah, like most of the western United States, has few days of thunderstorms. On average there are fewer than 40 days of thunderstorm activity during the year, although these storms can be briefly intense when they do occur. They are most likely to occur during monsoon season from about mid-July through mid-September, especially in southern and eastern Utah. Dry lightning strikes and the general dry weather often spark wildfires in summer, while intense thunderstorms can lead to flash flooding, especially in the rugged terrain of southern Utah. Although spring is the wettest season in northern Utah, late summer is the wettest period for much of the south and east of the state. Tornadoes are uncommon in Utah, with an average of two striking the state yearly, rarely higher than EF1 intensity.

One exception of note, however, was the unprecedented F2 Salt Lake City Tornado that moved directly across downtown Salt Lake City on August 11, 1999, killing 1 person, injuring 60 others, and causing approximately $170 million in damage. The only other reported tornado fatality in Utah’s history was a 7-year-old girl who was killed while camping in Summit County on July 6, 1884. The last tornado of above (E)F0 intensity occurred on September 8, 2002, when an F2 tornado hit Manti. On August 11, 1993, an F3 tornado hit the Uinta Mountains north of Duchesne at an elevation of 10,500 feet (3,200 m), causing some damage to a Boy Scouts campsite. This is the strongest tornado ever recorded in Utah.

Transportation

I-15 and I-80 are the main interstate highways in the state, where they intersect and briefly merge near downtown Salt Lake City. I-15 traverses the state north-to-south, entering from Arizona near St. George, paralleling the Wasatch Front, and crossing into Idaho near Portage. I-80 spans northern Utah east-to-west, entering from Nevada at Wendover, crossing the Wasatch Mountains east of Salt Lake City, and entering Wyoming near Evanston. I-84 West enters from Idaho near Snowville (from Boise) and merges with I-15 from Tremonton to Ogden, then heads southeast through the Wasatch Mountains before terminating at I-80 near Echo Junction.

I-70 splits from I-15 at Cove Fort in central Utah and heads east through mountains and rugged desert terrain, providing quick access to the many national parks and national monuments of southern Utah, and has been noted for its beauty. The 103-mile (163 km) stretch from Salina to Green River is the longest stretch of interstate in the country without services and, when completed in 1970, was the longest stretch of entirely new highway constructed in the U.S. since the Alaska Highway was completed in 1943.

TRAX, a light rail system in the Salt Lake Valley, consists of three lines. The Blue Line (formerly Salt Lake/Sandy Line) begins in the suburb of Draper and ends in Downtown Salt Lake City. The Red Line (Mid-Jordan/University Line) begins in the Daybreak Community of South Jordan, a southwestern valley suburb, and ends at the University of Utah. The Green Line begins in West Valley City, passes through downtown Salt Lake City, and ends at Salt Lake City International Airport.

The Utah Transit Authority (UTA), which operates TRAX, also operates a bus system that stretches across the Wasatch Front, west into Grantsville, and east into Park City. In addition, UTA provides winter service to the ski resorts east of Salt Lake City, Ogden, and Provo. Several bus companies also provide access to the ski resorts in winter, and local bus companies also serve the cities of Cedar City, Logan, Park City, and St. George. A commuter rail line known as FrontRunner, also operated by UTA, runs between Pleasant View and Provo via Salt Lake City. Amtrak’s California Zephyr, with one train in each direction daily, runs east-west through Utah with stops in Green River, Helper, Provo, and Salt Lake City.

Salt Lake City International Airport is the only international airport in the state and serves as one of the hubs for Delta Air Lines. The airport has consistently ranked first in on-time departures and had the fewest cancellations among U.S. airports. The airport has non-stop service to over 100 destinations throughout the United States, Canada, and Mexico, as well as to Paris. Canyonlands Field (near Moab), Cedar City Regional Airport, Ogden-Hinckley Airport, Provo Municipal Airport, St. George Regional Airport, and Vernal Regional Airport all provide limited commercial air service. An entirely new regional airport at St. George opened on January 12, 2011. SkyWest Airlines is also headquartered in St. George and maintains a hub at Salt Lake City.

Major Cities and Towns

Salt Lake City

Logan

Ogden

Park City

Provo

Sandy

St. George

Utah’s population is concentrated in two areas, the Wasatch Front in the north-central part of the state, with a population of over 2 million; and Washington County, in southwestern Utah, locally known as “Dixie”, with over 150,000 residents in the metropolitan area.

According to the 2010 Census, Utah was the second fastest-growing state (at 23.8 percent) in the United States between 2000 and 2010 (behind Nevada). St. George, in the southwest, is the second fastest-growing metropolitan area in the United States, trailing Greeley, Colorado.

The three fastest-growing counties from 2000 to 2010 were Wasatch County (54.7%), Washington County (52.9%), and Tooele County (42.9%). However, Utah County added the most people (148,028). Between 2000 and 2010, Saratoga Springs (1,673%), Herriman (1,330%), Eagle Mountain (893%), Cedar Hills (217%), South Willard (168%), Nibley (166%), Syracuse (159%), West Haven (158%), Lehi (149%), Washington (129%), and Stansbury Park (116%) all at least doubled in population. West Jordan (35,376), Lehi (28,379), St. George (23,234), South Jordan (20,981), West Valley City (20,584), and Herriman (20,262) all added at least 20,000 people.

• Until 2003, the Salt Lake City and Ogden-Clearfield metropolitan areas were considered as a single metropolitan area.