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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 tr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tornadoes Of 1999
This page documents the tornadoes and tornado outbreaks of 1999, primarily (but not entirely) in the United States. Most tornadoes form in the U.S., although some events may take place internationally, particularly in parts of neighboring southern Canada during the Northern Hemisphere's summer season, as well as Europe. One particular event, the Bridge Creek-Moore, Oklahoma F5 tornado, produced the highest wind speed ever recorded on Earth, which was . Statistics United States During 1999, a total of 1,339 tornadoes touched down across the United States, ranking it as the eighth-most active year since reliable records began to be kept in 1950; at the time, 1999 was the fourth-most active year on record. The year began with the most active January on record, featuring 216 tornadoes. Culminating with the largest outbreak in the month, with over 100 tornadoes touching down on January 21 and 22 (surpassing the previous daily record of 39 on January 10, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anadarko, Oklahoma
Anadarko is a city in Caddo County, Oklahoma, United States. The city is fifty miles southwest of Oklahoma City. The population was 5,745 at the 2020 census. It is the county seat of Caddo County. History Anadarko got its name when its post office was established in 1873. The designation came from the Nadaco Native Americans, a branch of the Caddo Nation, and the "A" was added due to a clerical error.Carolyn Riffel and Betty Bell, "Anadarko." ''Encyclopedia of Oklahoma History and Culture''. Accessed April 17, 2015. In 1871, the Wichita Agency was reestablished on the north bank of the after bein ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bridge Creek, Oklahoma
Bridge Creek is a town in Grady County, Oklahoma, United States. As of the 2010 census, the town population was 336. History Bridge Creek was incorporated as a town in 2000. The town proper and the unincorporated areas that its limits enclose are part of a rapidly growing area of northern McClain and Grady counties known as the "Tri-City Area" with Newcastle, Tuttle and Blanchard. Bridge Creek was one of several communities hardest hit by an F5 tornado in the deadly May 3, 1999, tornado outbreak. At least 12 people died in the Bridge Creek area. Doppler radar measured wind speeds of in this tornado when it was near Bridge Creek. This is the highest wind speed ever recorded on Earth. The town was hit again by an EF3 tornado on May 6, 2015, 16 years and 3 days after the 1999 tornado. Homes were destroyed or heavily damaged. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Storm Prediction Center
The Storm Prediction Center (SPC) is a US government agency A government or state agency, sometimes an appointed commission, is a permanent or semi-permanent organization in the machinery of government that is responsible for the oversight and administration of specific functions, such as an administrati ... that is part of the National Centers for Environmental Prediction (NCEP), operating under the control of the National Weather Service (NWS), which in turn is part of the National Oceanic and Atmospheric Administration (NOAA) of the United States Department of Commerce (DoC). Headquartered at the National Weather Center in Norman, Oklahoma, Norman, Oklahoma, the Storm Prediction Center is tasked with forecasting the risk of severe thunderstorms and tornadoes in the contiguous United States. It issues #Convective outlooks, convective outlooks, #Mesoscale discussions, mesoscale discussions, and #Weather watches, watches as a part of this process. Convective outlooks are issu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dew Point
The dew point is the temperature to which air must be cooled to become saturated with water vapor, assuming constant air pressure and water content. When cooled below the dew point, moisture capacity is reduced and airborne water vapor will condense to form liquid water known as dew. When this occurs via contact with a colder surface, dew will form on that surface. The dew point is affected by humidity. When there is more moisture in the air, the dew point is higher. When the temperature is below the freezing point of water, the dew point is called the frost point, as frost is formed via deposition rather than condensation. In liquids, the analog to the dew point is the cloud point. Humidity If all the other factors influencing humidity remain constant, at ground level the relative humidity rises as the temperature falls; this is because less vapor is needed to saturate the air. In normal conditions, the dew point temperature will not be greater than the air temperature, sinc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Central Time Zone
The North American Central Time Zone (CT) is a time zone in parts of Canada, the United States, Mexico, Central America, some Caribbean Islands, and part of the Eastern Pacific Ocean. Central Standard Time (CST) is six hours behind Coordinated Universal Time (UTC). During summer, most of the zone uses daylight saving time (DST), and changes to Central Daylight Time (CDT) which is five hours behind UTC. The largest city in the Central Time Zone is Mexico City; the Mexico City metropolitan area is the largest metropolitan area in the zone and in North America. Regions using (North American) Central Time Canada The province of Manitoba is the only province or territory in Canada that observes Central Time in all areas. The following Canadian provinces and territories observe Central Time in the areas noted, while their other areas observe Eastern Time: * Nunavut (territory): western areas (most of Kivalliq Region and part of Qikiqtaaluk Region) * Ontario (province): a port ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Childress, Texas
Childress ( ) (established 1887; incorporated 1890) is a city in Childress County, Texas, United States. The population was 6,905 at the 2010 census. It is the county seat of Childress County. The city and county were named in honor of George Campbell Childress, a native of Nashville, Tennessee, who was the principal author of the Texas Declaration of Independence. The county and city were incorporated more than four decades after Childress's death. In December 2015, the ''Seattle Post-Intelligencer'' voted Childress ninth among the ten "most conservative" cities in the United States in regard to political contributions. Other West Texas communities in the most conservative lineup are Hereford (No. 1), Monahans (No. 5), and Dalhart in Dallam County in the far northwestern Texas Panhandle (No. 8). Princeton in Collin County north of Dallas ranked No. 2. In contrast, Vashon Island, Washington was named the "most liberal" city in the nation in terms of political donations. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gage, Oklahoma
Gage is a town in Ellis County, Oklahoma, United States. The population was 442 at the 2010 census. History Located in the central part of Ellis County on SH-46, thirteen miles north of the county seat, Arnett, and on SH-15, twenty-one miles southwest of Woodward, Gage developed primarily because of transportation access. The military road from Fort Supply to Fort Elliott/Mobeetie, Texas, passed near the future town, and two miles to the northwest a stage stop existed at the confluence of Little Wolf Creek and Wolf Creek. In 1887 the Southern Kansas Railway (later part of the Atchison, Topeka and Santa Fe Railway) had constructed a line across northwestern Oklahoma from Kansas to the Texas Panhandle. A station called Gage, named for Chicago railroad financier Lyman J. Gage, was established in July near Wolf Creek. Once the domain of various Plains Indian groups, by that time this region had become part of the Cherokee Outlet, opened to settlement by a land run in September ... [...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 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. 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 moist air of lesser or similar temperature, and thus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Great Plains
The Great Plains (french: Grandes Plaines), sometimes simply "the Plains", is a broad expanse of flatland in North America. It is located west of the Mississippi River and east of the Rocky Mountains, much of it covered in prairie, steppe, and grassland. It is the southern and main part of the Interior Plains, which also include the tallgrass prairie between the Great Lakes and Appalachian Plateau, and the Taiga Plains and Boreal Plains ecozones in Northern Canada. The term Western Plains is used to describe the ecoregion of the Great Plains, or alternatively the western portion of the Great Plains. The Great Plains lies across both Central United States and Western Canada, encompassing: * The entirety of the U.S. states of Kansas, Nebraska, North Dakota and South Dakota; * Parts of the U.S. states of Colorado, Iowa, Minnesota, Missouri, Montana, New Mexico, Oklahoma, Texas and Wyoming; * The southern portions of the Canadian provinces of Alberta, Saskatchewan and Manitoba. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trough (meteorology)
A trough is an elongated region of relatively low atmospheric pressure without a closed isobaric contour that would define it as a low pressure area. Since low pressure implies a low height on a pressure surface, troughs and ridges refer to features in an identical sense as those on a topographic map. Troughs may be at the surface, or aloft. Near-surface troughs sometimes mark a weather front associated with clouds, showers, and a wind direction shift. Upper-level troughs in the jet stream (as shown in diagram) reflect cyclonic filaments of vorticity. Their motion induces upper-level wind divergence, lifting and cooling the air ahead (downstream) of the trough and helping to produce cloudy and rain conditions there. Unlike fronts, there is not a universal symbol for a trough on a surface weather analysis chart. The weather charts in some countries or regions mark troughs by a line. In the United States, a trough may be marked as a dashed line or bold line. In the UK, Hong Kong ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meteorological Setup Of The 1999 Oklahoma Tornado Outbreak
Meteorology is a branch of the atmospheric sciences (which include atmospheric chemistry and physics) with a major focus on weather forecasting. The study of meteorology dates back millennia, though significant progress in meteorology did not begin until the 18th century. The 19th century saw modest progress in the field after weather observation networks were formed across broad regions. Prior attempts at prediction of weather depended on historical data. It was not until after the elucidation of the laws of physics, and more particularly in the latter half of the 20th century the development of the computer (allowing for the automated solution of a great many modelling equations) that significant breakthroughs in weather forecasting were achieved. An important branch of weather forecasting is marine weather forecasting as it relates to maritime and coastal safety, in which weather effects also include atmospheric interactions with large bodies of water. Meteorological pheno ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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