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Climate Of Oklahoma City
Oklahoma City lies in a temperate humid subtropical climate (Köppen: Cfa), with frequent variations in weather daily and seasonally, except during the consistently hot and humid summer months. Consistent winds, usually from the south or south-southeast during the summer, help temper the hotter weather. Consistent northerly winds during the winter can intensify cold periods. Oklahoma City's climate transitions toward semi-arid further to the west, toward humid continental to the north, and toward humid subtropical to the east and southeast. The normal annual mean temperature is ; the coolest year was 1895 with a mean of , while the warmest 2012 at . Precipitation averages annually, falling on an average 84 days, with the warmer months receiving more; annual precipitation has historically ranged from in 1901 to in 2007. The sun shines about 69% of the time, with monthly percent possible sunshine ranging from 60% in December to 80% in July. Winter Winters are typically cool, rela ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oklahoma City
Oklahoma City (), officially the City of Oklahoma City, and often shortened to OKC, is the capital and largest city of the U.S. state of Oklahoma. The county seat of Oklahoma County, it ranks 20th among United States cities in population, and is the 8th largest city in the Southern United States. The population grew following the 2010 census and reached 687,725 in the 2020 census. The Oklahoma City metropolitan area had a population of 1,396,445, and the Oklahoma City– Shawnee Combined Statistical Area had a population of 1,469,124, making it Oklahoma's largest municipality and metropolitan area by population. Oklahoma City's city limits extend somewhat into Canadian, Cleveland, and Pottawatomie counties, though much of those areas outside the core Oklahoma County area are suburban tracts or protected rural zones (watershed). The city is the eighth-largest in the United States by area including consolidated city-counties; it is the second-largest, after Houston, not i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1999 Oklahoma Tornado Outbreak
The 1999 Oklahoma tornado outbreak was a significant tornado outbreak that affected much of the Central and parts of the Eastern United States, with the highest record-breaking wind speeds of . During this week-long event, 154 tornadoes touched down (including one in Canada). More than half of them were on May 3 and 4 when activity reached its peak over Oklahoma, Kansas, Nebraska, Texas, and Arkansas. The most significant tornado first touched down southwest of Chickasha, Oklahoma, and became an F5 before dissipating near Midwest City. The tornado tore through southern and eastern parts of Oklahoma City and its suburbs of Bridge Creek, Moore, Del City, Tinker Air Force Base and Midwest City, killing 36 people, destroying more than 8,000 homes, and causing $1.5 billion in damage. With a total of 72 tornadoes, it was the most prolific tornado outbreak in Oklahoma history, although not the deadliest. Meteorological synopsis The outbreak was caused by a vigorous upper-level ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ultraviolet Index
The ultraviolet index, or UV index, is an international standard measurement of the strength of the sunburn-producing ultraviolet (UV) radiation at a particular place and time. It is primarily used in daily and hourly forecasts aimed at the general public. The UV index is designed as an open-ended linear scale, directly proportional to the intensity of UV radiation that causes human skin to sunburn. Using the Fitzpatrick scale, a light-skinned individual would experience sunburn in about 30 minutes at UV index 6, without sunscreen. That same individual would experience sunburn in only 15 minutes if the UV index was at 12. The purpose of the UV index is to help people effectively protect themselves from UV radiation, which has health benefits in moderation but in excess causes sunburn, skin aging, DNA damage, skin cancer, immunosuppression, and eye damage, such as cataracts. The scale was developed by Canadian scientists in 1992, and then adopted and standardized by the UN's Wo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2013 El Reno Tornado
During the early evening of Friday, May 31, 2013, a very large and powerful tornado occurred over rural areas of Central Oklahoma. This rain-wrapped, multiple-vortex tornado was the widest tornado ever recorded and was part of a larger weather system that produced dozens of tornadoes over the preceding days. The tornado initially touched down at 6:03 p.m. Central Daylight Time (2303 UTC) about west-southwest of El Reno, rapidly growing in size and becoming more violent as it tracked through central portions of Canadian County. Remaining over mostly open terrain, the tornado did not impact many structures; however, measurements from mobile weather radars revealed extreme winds up to within the vortex. These are among the highest observed wind speeds on Earth, just slightly lower than the wind speeds of the 1999 Bridge Creek–Moore tornado. As it crossed U.S. 81, it had grown to a record-breaking width of , beating the previous width record held by the 200 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tornado Outbreak Of May 26–31, 2013
A prolonged and widespread tornado outbreak sequence affected a large portion of the United States in late-May 2013. The outbreak was the result of a slow-moving but powerful storm system that produced several strong tornadoes across the Great Plains states, especially in Kansas and Oklahoma. Other strong tornadoes caused severe damage in Nebraska, Missouri, Illinois, and Michigan. The outbreak extended as far east as Upstate New York. 27 fatalities were reported in total, with nine resulting from tornadoes (eight in Oklahoma and one in Arkansas). By far the most significant tornado of the outbreak was an extremely large EF3 tornado that struck areas near the town of El Reno, Oklahoma on May 31. With a maximum width of , it was the largest tornado on record. The second highest wind speeds recorded on Earth, around , were also observed in this tornado. The twister was responsible for eight deaths, including famous storm chaser Tim Samaras, his son Paul, and Carl Young as a result ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2013 Moore Tornado
On the afternoon of May 20, 2013, a large and extremely violent EF5 tornado ravaged through Moore, Oklahoma, and adjacent areas, with peak winds estimated at , killing 24 people (plus two indirect fatalities) and injuring 212 others. The tornado was part of a larger weather system that had produced several other tornadoes across the Great Plains over the previous two days, including five that struck portions of Central Oklahoma the day prior on May 19. The tornado touched down just northwest of Newcastle at 2:56 p.m. CDT (19:46 UTC), and stayed on the ground for 39 minutes over a path, crossing through a heavily populated section of Moore. The tornado was wide at its peak. It followed a roughly similar track to the deadlier 1999 Bridge Creek–Moore tornado, which was smaller in size but just as severe; however, very few homes and neither of the stricken schools in the area had purpose-built storm shelters in the intervening years since the earlier torna ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Enhanced Fujita Scale
The Enhanced Fujita scale (abbreviated as EF-Scale) rates tornado intensity based on the severity of the damage they cause. It is used in some countries, including the United States, Canada, China, and Mongolia. The Enhanced Fujita scale replaced the decommissioned Fujita scale that was introduced in 1971 by Ted Fujita. Operational use began in the United States on February 1, 2007, followed by Canada on April 1, 2013. It has also been proposed for use in France. 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 i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moore, Oklahoma
Moore is a city in Cleveland County, Oklahoma, United States, and is part of the Oklahoma City metropolitan area. The population was 62,793 at the 2020 census, making Moore the seventh-largest city in the state of Oklahoma. Located between Oklahoma City and Norman, the city has been the site of several devastating tornadoes, with those occurring in 1999 and 2013 receiving international attention. The 3 costliest tornadoes in Oklahoma history all occurred in Moore. History The Moore post office was established May 27, 1889, during the Land Run of 1889 and was named for Al Moore, an Atchison, Topeka and Santa Fe Railway employee. According to the town history he was a "conductor or a brakeman, lived in a boxcar at the camp and had difficulty receiving his mail. He painted his name – "Moore" – on a board and nailed it on the boxcar. When a postmaster was appointed, he continued to call the settlement Moore. When the town incorporated in 1893 the name was legalized." The city ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fujita Scale
The Fujita scale (F-Scale; ), or Fujita–Pearson scale (FPP scale), is a scale for rating tornado intensity, based primarily on the damage tornadoes inflict on human-built structures and vegetation. The official Fujita scale category is determined by meteorologists and engineers after a ground or aerial damage survey, or both; and depending on the circumstances, ground-swirl patterns (cycloidal marks), weather radar data, witness testimonies, media reports and damage imagery, as well as photogrammetry or videogrammetry if motion picture recording is available. The Fujita scale was replaced with the Enhanced Fujita scale (EF-Scale) in the United States in February 2007. In April 2013, Canada adopted the EF-Scale over the Fujita scale along with 31 "Specific Damage Indicators" used by Environment Canada (EC) in their ratings. Background The scale was introduced in 1971 by Ted Fujita of the University of Chicago, in collaboration with Allen Pearson, head of the National ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Derecho
A ''derecho'' (, from es, derecho, link=no , 'straight') is a widespread, long-lived, straight-line wind storm that is associated with a fast-moving group of severe thunderstorms known as a mesoscale convective system. Derechos can cause hurricanic and tornadic-force winds, heavy rains, and flash floods. In many cases, convection-induced winds take on a bow echo (backward "C") form of squall line, often forming beneath an area of diverging upper tropospheric winds, and in a region of both rich low-level moisture and warm-air advection. Derechos move rapidly in the direction of movement of their associated storms, similar to an outflow boundary (gust front), except that the wind remains sustained for a greater period of time (often increasing in strength after onset), and may exceed hurricane-force. A derecho-producing convective system may remain active for many hours and, occasionally, over multiple days. A warm-weather phenomenon, derechos occur mostly in summer, esp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Humid Subtropical Climate
A humid subtropical climate is a zone of climate characterized by hot and humid summers, and cool to mild winters. These climates normally lie on the southeast side of all continents (except Antarctica), generally between latitudes 25° and 40° and are located poleward from adjacent tropical climates. It is also known as warm temperate climate in some climate classifications. Under the Köppen climate classification, ''Cfa'' and ''Cwa'' climates are either described as humid subtropical climates or warm temperate climates. This climate features mean temperature in the coldest month between (or ) and and mean temperature in the warmest month or higher. However, while some climatologists have opted to describe this climate type as a "humid subtropical climate", Köppen himself never used this term. The humid subtropical climate classification was officially created under the Trewartha climate classification. In this classification, climates are termed humid subtropical when ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hail
Hail is a form of solid precipitation. It is distinct from ice pellets (American English "sleet"), though the two are often confused. It consists of balls or irregular lumps of ice, each of which is called a hailstone. Ice pellets generally fall in cold weather, while hail growth is greatly inhibited during low surface temperatures. Unlike other forms of water ice precipitation, such as graupel (which is made of rime ice), ice pellets (which are smaller and translucent), and snow (which consists of tiny, delicately crystalline flakes or needles), hailstones usually measure between and in diameter. The METAR reporting code for hail or greater is GR, while smaller hailstones and graupel are coded GS. Hail is possible within most thunderstorms (as it is produced by cumulonimbus), as well as within of the parent storm. Hail formation requires environments of strong, upward motion of air within the parent thunderstorm (similar to tornadoes) and lowered heights of the freezing l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
