Upper Great Lakes Severe Weather Outbreak Of August 23, 1998
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Upper Great Lakes Severe Weather Outbreak Of August 23, 1998
The Upper Great Lakes severe weather outbreak of August 23, 1998 was a severe weather outbreak that affected parts of Wisconsin, and the Upper Peninsula of Michigan. The outbreak occurred on August 23, 1998, and caused millions of dollars in damage to the region. One fatality is attributed to this severe weather event, when a severe thunderstorm knocked a tree onto a camper killing its sole occupant. A supercell spawned a F3 tornado that ripped across Door County causing $6.5 million in damages. It was the 8th most costly tornado in Wisconsin history injuring two people, destroying multiple structures and disrupting the regional economy and tourism. Two storms moved through the Fox Valley producing a minimal F0 tornado, but devastating amounts of hail. Damages from the hail were estimated to be around $5 million and damaged many structures and vehicles. Wisconsin Governor Tommy Thompson requested a Presidential Disaster Declaration from President Bill Clinton for the disaster, but ...
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Supercell
A supercell is a thunderstorm characterized by the presence of a mesocyclone: a deep, persistently rotating updraft. Due to this, these storms are sometimes referred to as rotating thunderstorms. Of the four classifications of thunderstorms (supercell, squall line, multi-cell, and single-cell), supercells are the overall least common and have the potential to be the most severe. Supercells are often isolated from other thunderstorms, and can dominate the local weather up to away. They tend to last 2–4 hours. Supercells are often put into three classification types: classic (Normal precipitation level), low-precipitation (LP), and high-precipitation (HP). LP supercells are usually found in climates that are more arid, such as the high plains of the United States, and HP supercells are most often found in moist climates. Supercells can occur anywhere in the world under the right pre-existing weather conditions, but they are most common in the Great Plains of the United State ...
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Cumulus Cloud
Cumulus clouds are clouds which have flat bases and are often described as "puffy", "cotton-like" or "fluffy" in appearance. Their name derives from the Latin ''cumulo-'', meaning ''heap'' or ''pile''. Cumulus clouds are low-level clouds, generally less than in altitude unless they are the more vertical cumulus congestus form. Cumulus clouds may appear by themselves, in lines, or in clusters. Cumulus clouds are often precursors of other types of clouds, such as cumulonimbus, when influenced by weather factors such as instability, moisture, and temperature gradient. Normally, cumulus clouds produce little or no precipitation, but they can grow into the precipitation-bearing congests or cumulonimbus clouds. Cumulus clouds can be formed from water vapour, supercooled water droplets, or ice crystals, depending upon the ambient temperature. They come in many distinct subforms and generally cool the earth by reflecting the incoming solar radiation. Cumulus clouds are part of the larg ...
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Tornado Warning
A tornado warning ( SAME code: TOR) is a severe weather warning product issued by regional offices of weather forecasting agencies throughout the world to alert the public when a tornado has been reported or indicated by weather radar within the parent severe thunderstorm. It can be issued after a tornado, funnel cloud and rotation in the clouds has been witnessed by the public, storm chasers, emergency management or law enforcement, and indicates that residents in the affected areas should take immediate safety precautions. A warning should not be confused with a tornado watch, issued in the United States by the Storm Prediction Center (SPC) and in other countries by applicable regional forecasting agencies or national severe weather guidance centers, which only indicates that conditions are favorable for the formation of tornadoes. Although a tornado warning is generally a higher alert level than a tornado watch, in the U.S., it can be surpassed by a higher-level alert—struct ...
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Menasha, Wisconsin
Menasha () is a city in Calumet and Winnebago counties in the U.S. state of Wisconsin. The population was 18,268 at the 2020 census. Of this, 15,144 were in Winnebago County, and 2,209 were in Calumet County. The city is located mostly in Winnebago County; only a small portion is in the Town of Harrison in Calumet County. Doty Island is located partially in Menasha. The city's name comes from the Winnebago word meaning "thorn" or "island". In the Menominee language, it is known as ''Menāēhsaeh'', meaning "little island". Menasha is home to the Barlow Planetarium and Weis Earth Science Museum, both housed at the University of Wisconsin-Oshkosh, Fox Cities Campus. Geography Menasha is located at (44.2129, −88.4362). According to the United States Census Bureau, the city has a total area of , of which, is land and is water. Demographics Menasha is a city in the Fox Cities, Appleton–Oshkosh–Neenah CSA, a Combined Statistical Area which includes the Appleton (Calumet ...
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Appleton, Wisconsin
Appleton ( mez, Ahkōnemeh) is a city in Outagamie, Calumet, and Winnebago counties in the U.S. state of Wisconsin. One of the Fox Cities, it is situated on the Fox River, southwest of Green Bay and north of Milwaukee. Appleton is the county seat of Outagamie County. As of the 2020 Census it had a population of 75,644, making it the sixth largest city in Wisconsin. Appleton is a part of the Fox Cities metropolitan area, the third largest in the state behind Milwaukee and Madison. Appleton serves as the heart of the Fox River Valley, which is home to Lawrence University, the Fox Cities Exhibition Center, Fox Cities Performing Arts Center, Fox River Mall, Neuroscience Group Field at Fox Cities Stadium, Appleton International Airport, and the Valley's two major hospitals: St. Elizabeth Hospital and ThedaCare Regional Medical Center–Appleton. It also hosts regional events such as Octoberfest and the Mile of Music. History Native American history The territory wh ...
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Oconto County, Wisconsin
Oconto County is a county in the U.S. state of Wisconsin. As of the 2020 census, the population was 38,965. Its county seat is Oconto. The county was established in 1851. Oconto County is part of the Green Bay, WI Metropolitan Statistical Area and the Green Bay- Shawano, WI Combined Statistical Area. History First visited by French explorers in the 17th century, Oconto County is among the oldest settlements in Wisconsin. Father Claude-Jean Allouez of the Roman Catholic Jesuit order said the first Mass in Oconto. Among the first settlers was Joseph Tourtilott, who explored much of the Oconto River watershed. Oconto County was created in 1851 and organized in 1854. Geography According to the U.S. Census Bureau, the county has a total area of , of which is land and (13%) is water. Adjacent counties * Marinette County - northeast * Door County - southeast, border is in Green Bay * Brown County - south * Shawano County - southwest * Menominee County - west * Langlade ...
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Marinette County, Wisconsin
Marinette County is a county in the U.S. state of Wisconsin. As of the 2020 census, the population was 41,872. Its county seat is Marinette. Marinette County is part of the Marinette, WI– MI Micropolitan Statistical Area. Geography According to the U.S. Census Bureau, the county has a total area of , of which is land and (9.7%) is water. It is the third-largest county in Wisconsin by land area and fifth-largest by total area. Part of Marinette County borders Lake Michigan, and this area is home to endemic plants. Adjacent counties * Dickinson County, Michigan - north * Menominee County, Michigan - northeast * Door County - east and southeast, border is in Green Bay * Oconto County - southwest * Forest County - west * Florence County - northwest Major highways * U.S. 8 * U.S. 41 * U.S. 141 * Highway 64 * Highway 180 Railroads *Canadian National *Escanaba and Lake Superior Railroad *Watco Buses *List of intercity bus stops in Wisconsin Airport Crivitz M ...
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Forest County, Wisconsin
Forest County is a county (United States), county in the U.S. state of Wisconsin. As of the 2020 United States Census, 2020 census, the population was 9,179. Its county seat is Crandon, Wisconsin, Crandon. The Forest County Potawatomi Community and the Sokaogon Chippewa Community have reservations in Forest County. History Forest County was created by the Wisconsin State Legislature in 1885 from portions of neighboring Langlade and Oconto counties. The county was named for the forests contained within its limits. Geography According to the United States Census Bureau, U.S. Census Bureau, the county has a total area of , of which is land and (3.1%) is water. Adjacent counties * Florence County, Wisconsin, Florence County - northeast * Marinette County, Wisconsin, Marinette County - east * Oconto County, Wisconsin, Oconto County - southeast * Langlade County, Wisconsin, Langlade County - southwest * Oneida County, Wisconsin, Oneida County - west * Vilas County, Wisconsin, Vilas ...
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Mesoscale Meteorology
Mesoscale meteorology is the study of weather systems smaller than synoptic scale systems but larger than Microscale meteorology, microscale and storm-scale cumulus systems. Horizontal dimensions generally range from around 5 kilometers to several hundred kilometers. Examples of mesoscale weather systems are sea breezes, squall lines, and mesoscale convective complexes. Vertical velocity often equals or exceeds horizontal velocities in mesoscale meteorological systems due to nonhydrostatic processes such as buoyant acceleration of a rising thermal or acceleration through a narrow mountain pass. Subclasses Mesoscale Meteorology is divided into these subclasses: * Meso-alpha 200–2000 km scale of phenomena like fronts, squall lines, mesoscale convective systems (MCS), tropical cyclones at the edge of synoptic scale * Meso-beta 20–200 km scale of phenomena like sea breezes, lake effect snow storms * Meso-gamma 2–20 km scale of phenomena like thunderstorm convectio ...
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Fox Cities
The Fox Cities of Northeastern Wisconsin are the cities, towns and villages along the Fox River as it flows from Lake Winnebago northward into Green Bay. The Fox Cities communities, as defined by its Chamber of Commerce and Convention and Visitors Bureau, include: * Calumet County * Outagamie County * Winnebago County * The cities of Appleton (pop. 74,526), Kaukauna (16,246), Menasha (18,268), Neenah (26,062), and Oshkosh (67,004). * The villages of Combined Locks (pop. 3,588), Fox Crossing (19,029), Harrison (11,532), Hortonville (2,767), Kimberly (6,803), Little Chute (11,564), Sherwood (2,985), and Greenville (10,309) * The towns of Buchanan (pop. 6,755), Clayton (3,951), Freedom (5,842), Grand Chute (20,919), Greenville, Kaukauna (1,238), Neenah (3,237), Vandenbroek (1,474). Major points of interest include the Fox Cities Exhibition Center, Community First Champion Center, Fox Cities Performing Arts Center, High Cliff State Park, and Neuroscience Group F ...
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Mesocyclone
A mesocyclone is a meso-gamma mesoscale (or storm scale) region of rotation (vortex), typically around in diameter, most often noticed on radar within thunderstorms. In the northern hemisphere it is usually located in the right rear flank (back edge with respect to direction of movement) of a supercell, or often on the eastern, or leading, flank of a high-precipitation variety of supercell. The area overlaid by a mesocyclone’s circulation may be several miles (km) wide, but substantially larger than any tornado that may develop within it, and it is within mesocyclones that intense tornadoes form. Description Mesocyclones are medium-scale vortices of rising and converging air that circulate around a vertical axis. They are most often associated with a local region of low-pressure. Their rotation is (usually) in the same direction as low pressure systems in a given hemisphere: counter-clockwise in the northern, and clockwise in the southern hemisphere, with the only occasio ...
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