Arkansas is a state located in the southern region of the United States. Its name is an Algonquin name of the Quapaw Indians. Arkansas shares a border with six states (clockwise: N: Missouri; E: Tennessee, Mississippi; S: Louisiana; W: Texas, Oklahoma) with its eastern border largely defined by the Mississippi River. Its diverse geography ranges from the mountainous regions of the Ozarks and the Ouachita Mountains, which make up the U.S. Interior Highlands, to the eastern lowlands along the Mississippi River. The capital and most populous city is Little Rock, located in the central portion of the state.
The Mississippi River forms most of Arkansas's eastern border, except in Clay and Greene counties where the St. Francis River forms the western boundary of the Missouri Bootheel, and in dozens of places where the current channel of the Mississippi has meandered from where it had last been legally specified. Arkansas shares its southern border with Louisiana, its northern border with Missouri, its eastern border with Tennessee and Mississippi, and its western border with Texas and Oklahoma.
Arkansas is a land of mountains and valleys, thick forests and fertile plains. The so-called Lowlands are better known by names of their two regions, the Delta and the Grand Prairie. The Arkansas Delta is a flat landscape of rich alluvial soils formed by repeated flooding of the adjacent Mississippi. Farther away from the river, in the southeast portion of the state, the Grand Prairie consists of a more undulating landscape. Both are fertile agricultural areas.
The Delta region is bisected by an unusual geological formation known as Crowley's Ridge. A narrow band of rolling hills, Crowley's Ridge rises from 250 to 500 feet (150 m) above the surrounding alluvial plain and underlies many of the major towns of eastern Arkansas.
Northwest Arkansas is part of the Ozark Plateau including the Boston Mountains, to the south are the Ouachita Mountains and these regions are divided by the Arkansas River; the southern and eastern parts of Arkansas are called the Lowlands. These mountain ranges are part of the U.S. Interior Highlands region, the only major mountainous region between the Rocky Mountains and the Appalachian Mountains. The highest point in the state is Mount Magazine in the Ozark Mountains; it rises to 2,753 feet (839 m) above sea level.
Arkansas is home to many caves, such as Blanchard Springs Caverns. More than 43,000 Native American living, hunting and tool making sites, many of them Pre-Columbian burial mounds and rock shelters, have been catalogued by the State Archeologist. Arkansas is currently the only U.S. state in which diamonds are mined—although by members of the public with primitive digging tools for a small daily fee, not by commercial interests. (near Murfreesboro).
Arkansas is home to a dozen Wilderness Areas totaling around 150,000 acres (610 km2). These areas are set aside for outdoor recreation and are open to hunting, fishing, hiking, and primitive camping. No mechanized vehicles are allowed in these areas, some of which are rarely visited and can provide a good experience of feeling as if you are the only person to have ever stepped foot there.
Arkansas generally has a humid subtropical climate, which borders on humid continental in some northern highland areas. While not bordering the Gulf of Mexico, Arkansas is still close enough to this warm, large body of water for it to influence the weather in the state. Generally, Arkansas has hot, humid summers and cold, slightly drier winters. In Little Rock, the daily high temperatures average around 90 °F (32 °C) with lows around 70 °F (21 °C) in the month of July. In January highs average around 49 °F (9 °C) and lows around 30 °F (−1 °C). In Siloam Springs in the northwest part of the state, the average high and low temperatures in July are 89 °F (32 °C) and 67 °F (19 °C) and in January the average high and lows are 44 °F (7 °C) and 23 °F (−5 °C). Annual precipitation throughout the state averages between about 40 and 60 inches (1,000 and 1,500 mm); somewhat wetter in the south and drier in the northern part of the state. Snowfall is common, moreso in the north half of the state, which usually gets several snowfalls each winter. This is not only due to its closer proximity to the plains states, but also to the higher elevations found throughout the Ozark and Ouachita mountains. The half of the state south of Little Rock gets less snow, and is more apt to see ice storms, however, sleet and freezing rain are expected throughout the state during the winter months, and can significantly impact travel and day to day life.
Arkansas is known for extreme weather. A typical year will see thunderstorms, tornadoes, hail, snow and ice storms. Between both the Great Plains and the Gulf States, Arkansas receives around 60 days of thunderstorms. A few of the most destructive tornadoes in U.S. history have struck the state. While being sufficiently away from the coast to be safe from a direct hit from a hurricane, Arkansas can often get the remnants of a tropical system which dumps tremendous amounts of rain in a short time and often spawns smaller tornadoes. High water pouring down the White River caused historic flooding in cities along its path in eastern Arkansas.
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