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Tornado Outbreak Of April 21–23, 2020
On April 22, 2020, an outbreak of discrete supercell thunderstorms across portions of Oklahoma, Texas, and Louisiana led to widespread severe weather, including multiple strong tornadoes. Two people were killed by a high-end EF2 that struck the town of Madill, Oklahoma, and three more were killed by an EF3 wedge tornado that moved through Onalaska, Texas. Dozens of others were injured as well. The event came to fruition as a Trough (meteorology), trough progressed eastward across the United States, interacting with a moist and unstable environment. Tornado activity continued into Arkansas, Louisiana, Mississippi, Alabama, Florida, and Georgia (U.S. state), Georgia overnight into the day on April 23. Isolated tornado activity also occurred during the overnight hours on April 21. Meteorological synopsis On April 19, the Storm Prediction Center outlined portions of the U.S. Southern Plains with a 15% area of severe weather within 25 miles of any point. A Slight risk was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Onalaska, Texas
Onalaska is a city in Polk County, Texas, United States. Situated on a peninsula between the main channel and one arm of Lake Livingston, the population was 3,020 at the 2020 census. First settled in the 1840s, Onalaska became a prominent company town in the early 20th century as the site of the Carlisle Lumber Company’s East Texas operations. After the sawmill closed in 1925, the town declined until the construction of Lake Livingston in the late 1960s spurred new growth through tourism, retirement development, and real estate. Today, Onalaska is known for its recreational access to Lake Livingston and its historic roots as a planned industrial settlement. History Early settlement The area that would become Onalaska was first settled in 1840, primarily as a small farming community in what is now Polk County. The region remained sparsely populated and agriculturally focused until the early 20th century. Company-town era (1904–1928) In 1904, the Carlisle Lumber Compa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dry Line
A dry line (also called a dew point line, or Marfa front, after Marfa, Texas) is a line across a continent that separates moist air and dry air. One of the most prominent examples of such a separation occurs in central North America, especially Texas, Oklahoma, and Kansas, where the moist air from the Gulf of Mexico meets dry air from the desert south-western states. The dry line is an important factor in severe weather frequency in the Great Plains of North America. It typically lies north-south across the High Plains (United States), High Plains states in the warm sector of an extratropical cyclone and stretches into the Canadian Prairies during the spring and early summer. The dry line is also important for severe convective storms in other regions of the world, such as northern India and Southern Africa. In general, thunderstorms and other forms of severe weather occur on the moist side of the dryline. Characteristics Near the surface, warm dry air is denser than warm mois ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pauls Valley, Oklahoma
Pauls Valley is a city in and the county seat of Garvin County, Oklahoma, United States. The population was 5,992 at the 2020 census, a decline of 3.2 percent from the figure of 6,187 in 2010. It was settled by and named for Smith Paul, a North Carolina native who married a Chickasaw woman and became a citizen of the Chickasaw Nation before the Civil War. The town economy is largely based on agriculture and oil production. History The area that eventually became the city of Pauls Valley was one of the earliest European-American settlements in what was then known as Indian Territory. Smith Paul, born in 1809 in New Bern, North Carolina, discovered the fertile bottom land which is now Pauls Valley while a member of a wagon train traveling to California. Paul described the land as "a section where the bottom land was rich and blue stem grass grew so high that a man on horseback was almost hidden in its foliage." The Tri-Party Treaty of January 1, 1837, ceded this part of what is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stephens County, Oklahoma
Stephens County is a County (United States), county located in the U.S. state of Oklahoma. As of the 2020 United States census, 2020 census, its population was 42,848. Its county seat is Duncan, Oklahoma, Duncan. The county was created at statehood, partly from the Chickasaw Nation in Indian Territory and partly from Comanche County, Oklahoma, Comanche County in Oklahoma Territory. It was named for Texas politician John Hall Stephens.Wilson, Linda D. ''Encyclopedia of Oklahoma History and Culture''. "Stephens County." Retrieved September 21, 2013. Stephens County comprises the Duncan, OK micropolitan statistical area. History Stephens County was created at statehood from portions of both Oklahoma Territory and India ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marlow, Oklahoma
Marlow is a city in Stephens County, Oklahoma, United States. The population was 4,385 at the time of the 2020 Census. Marlow is located 10 miles north of Duncan, Oklahoma, and 30 miles east of Lawton, Oklahoma. History The site that would become Marlow was first settled by Dr. Williamson Marlow, the father of the five Marlow brothers, when he and his wife, Martha Jane, moved from Missouri to the Wildhorse Creek area in Oklahoma in 1880. William Rathmell's 1892 book ''Life of the Marlows'' detailed the history of the brothers' escapades and set a narrative for the city's legacy. Marlow brothers Born along the Chisholm Trail and on the banks of Wildhorse Creek, the legend of the Marlow family and the five Marlow brothers has been proven to be more fact than fiction. Dr. Williamson Marlow and his wife, Martha Jane, a relative of Daniel Boone, first established a homestead in this area during the early 1880s. The site of the original Marlow family home is reported to have be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grady County, Oklahoma
Grady County is a county located in the U.S. state of Oklahoma. As of the 2020 census, the population was 54,795. Its county seat is Chickasha. It was named for Henry W. Grady, an editor of the ''Atlanta Constitution'' and southern orator.O'Dell, Larry. ''Encyclopedia of Oklahoma History and Culture'' - Grady County accessed March 6, 2015 Grady County is part of the . History Grady County was part of the land given to the |
Comanche County, Oklahoma
Comanche County is a County (United States), county located in the U.S. state of Oklahoma. As of the 2020 United States census, 2020 census, the population was 121,125, making it the fifth-most populous county in Oklahoma. Its county seat is Lawton, Oklahoma, Lawton. The county was created in 1901 as part of Oklahoma Territory. It was named for the Comanche tribal nation.Linda D. Wilson, "Comanche County." ''Encyclopedia of Oklahoma History and Culture''. Accessed September 18, 2011, Comanche County is included in the Lawton, OK Lawton metropolitan area, metropolitan statistical area. Built on former reservation lands of the Comanche, Kiowa, and Fort Sill Apache, Apache in Indian Territory, Comanche County was open for settlement on A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sterling, Oklahoma
Sterling is a town in Comanche County, Oklahoma, United States. The population was 668 at the time of the 2020 Census. It is part of the Lawton Metropolitan Statistical Area. Geography Sterling is at the intersection of State Highway 17 and the northern terminus of State Highway 65. According to the United States Census Bureau, the town has a total area of , all land. Demographics As of the census of 2010, there were 793 people, 308 households, and 216 families residing in the town. The population density was . There were 341 housing units at an average density of . The racial makeup of the town was 90.2% White, 11.6% Native American, 0.3% Black or African American, 0.0% Pacific Islander, 0.6% from other races, and 4.7% from two or more races. Hispanic or Latino of any race were 4.7% of the population. There were 308 households, out of which 34.4% had children under the age of 18 living with them, 53.2% were married couples living together, 13.0% had a female househ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Enhanced Fujita Scale
The Enhanced Fujita scale (abbreviated EF-Scale) is a scale that rates tornado intensity based on the severity of the damage a tornado causes. It is used in the United States and France, among other countries. The EF scale is also unofficially used in other countries, including China and Brazil. The rating of a tornado is determined by conducting a tornado damage survey. The scale has the same basic design as the original Fujita scale—six intensity categories from zero to five, representing increasing degrees of damage. It was revised to reflect better examinations of tornado damage surveys, in order to align wind speeds more closely with associated storm damage. Better standardizing and elucidating what was previously subjective and ambiguous, it also adds more types of structures and vegetation, expands degrees of damage, and better accounts for variables such as differences in construction quality. An "EF-Unknown" (EFU) category was later added for tornadoes that cannot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coordinated Universal Time
Coordinated Universal Time (UTC) is the primary time standard globally used to regulate clocks and time. It establishes a reference for the current time, forming the basis for civil time and time zones. UTC facilitates international communication, navigation, scientific research, and commerce. UTC has been widely embraced by most countries and is the effective successor to Greenwich Mean Time (GMT) in everyday usage and common applications. In specialised domains such as scientific research, navigation, and timekeeping, other standards such as Universal Time, UT1 and International Atomic Time (TAI) are also used alongside UTC. UTC is based on TAI (International Atomic Time, abbreviated from its French name, ''temps atomique international''), which is a weighted average of hundreds of atomic clocks worldwide. UTC is within about one second of mean solar time at 0° longitude, the currently used prime meridian, and is not adjusted for daylight saving time. The coordination of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Time Zone
A time zone is an area which observes a uniform standard time for legal, Commerce, commercial and social purposes. Time zones tend to follow the boundaries between Country, countries and their Administrative division, subdivisions instead of strictly following longitude, because it is convenient for areas in frequent communication to keep the same time. Each time zone is defined by a standard offset from Coordinated Universal Time (UTC). The offsets range from UTC−12:00 to UTC+14:00, and are usually a whole number of hours, but a few zones are offset by an additional 30 or 45 minutes, such as in Indian Standard Time, India and Nepal Time, Nepal. Some areas in a time zone may use a different offset for part of the year, typically one hour ahead during spring (season), spring and summer, a practice known as daylight saving time (DST). List of UTC offsets In the table below, the locations that use daylight saving time (DST) are listed in their UTC offset when DST is ' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gulf Coast
The Gulf Coast of the United States, also known as the Gulf South or the South Coast, is the coastline along the Southern United States where they meet the Gulf of Mexico. The coastal states that have a shoreline on the Gulf of Mexico are Texas, Louisiana, Mississippi, Alabama, and Florida, and these are known as the ''Gulf States''. The economy of the Gulf Coast area is dominated by industries related to energy, petrochemicals, fishing, aerospace, agriculture, and tourism. The large cities of the region are (from west to east) Brownsville, Texas, Brownsville, Corpus Christi, Texas, Corpus Christi, Houston, Galveston, Texas, Galveston, Beaumont, Texas, Beaumont, Lake Charles, Louisiana, Lake Charles, Lafayette, Louisiana, Lafayette, Baton Rouge, Louisiana, Baton Rouge, New Orleans, Gulfport, Mississippi, Gulfport, Biloxi, Mississippi, Biloxi, Mobile, Alabama, Mobile, Pensacola, Florida, Pensacola, Panama City, Florida, Panama City, St. Petersburg, Florida, St. Petersburg, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
