Hurricane Bertha (1990)
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Hurricane Bertha (1990)
Hurricane Bertha caused minor damage in the United States, Bermuda, and Atlantic Canada in July and August 1990. The third tropical cyclone, second named storm, and first hurricane of the 1990 Atlantic hurricane season, Bertha developed from a frontal low pressure area offshore of North Carolina on July 24. Initially subtropical, it slowly acquired tropical characteristics while tracked southeast and then southwestward. By early on July 27, the cyclone was re-classified as a tropical depression. Following its transition, the depression intensified and was upgraded to Tropical Storm Bertha on July 28. The storm then curved northeastward and rapidly strengthened. Bertha became a hurricane early on July 29, though it weakened back to a tropical storm later that day. On the following day, Bertha re-intensified into a hurricane and peaked as an Category 1 hurricane on July 31. Early on August 2, Bertha made landfall near Sydney, Nova Scotia ...
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Nova Scotia
Nova Scotia ( ; ; ) is one of the thirteen provinces and territories of Canada. It is one of the three Maritime provinces and one of the four Atlantic provinces. Nova Scotia is Latin for "New Scotland". Most of the population are native English-speakers, and the province's population is 969,383 according to the 2021 Census. It is the most populous of Canada's Atlantic provinces. It is the country's second-most densely populated province and second-smallest province by area, both after Prince Edward Island. Its area of includes Cape Breton Island and 3,800 other coastal islands. The Nova Scotia peninsula is connected to the rest of North America by the Isthmus of Chignecto, on which the province's land border with New Brunswick is located. The province borders the Bay of Fundy and Gulf of Maine to the west and the Atlantic Ocean to the south and east, and is separated from Prince Edward Island and the island of Newfoundland by the Northumberland and Cabot straits, ...
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Tropical Wave
A tropical wave (also called easterly wave, tropical easterly wave, and African easterly wave), in and around the Atlantic Ocean, is a type of atmospheric trough, an elongated area of relatively low air pressure, oriented north to south, which moves from east to west across the tropics, causing areas of cloudiness and thunderstorms. Tropical waves form in the easterly flow along the equatorial side of the subtropical ridge or belt of high air pressure which lies north and south of the Intertropical Convergence Zone (ITCZ). Tropical waves are generally carried westward by the prevailing easterly winds along the tropics and subtropics near the equator. They can lead to the formation of tropical cyclones in the north Atlantic and northeastern Pacific basins. A tropical wave study is aided by Hovmöller diagrams, a graph of meteorological data. West-moving waves can also form from the tail end of frontal zones in the subtropics and tropics, and may be referred to as easterly wa ...
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West Palm Beach, Florida
West Palm Beach is a city in and the county seat of Palm Beach County, Florida, United States. It is located immediately to the west of the adjacent Palm Beach, which is situated on a barrier island across the Lake Worth Lagoon. The population was 117,415 at the 2020 census. West Palm Beach is a principal city of the Miami metropolitan area, which was home to 6,138,333 people in 2020. It is the oldest incorporated municipality in the South Florida area, incorporated as a city two years before Miami in November 1894. West Palm Beach is located approximately north of Downtown Miami. History The beginning of the historic period in south Florida is marked by Juan Ponce de León's first contact with native people in 1513. Europeans found a thriving native population, which they categorized into separate tribes: the Mayaimi in the Lake Okeechobee Basin and the Jaega and Ais people in the East Okeechobee area and on the east coast north of the Tequesta. When the Span ...
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Rip Currents
A rip current, often simply called a rip (or misleadingly a ''rip tide''), is a specific kind of water current that can occur near beaches with breaking waves. A rip is a strong, localized, and narrow current of water which moves directly away from the shore, cutting through the lines of breaking waves like a river running out to sea. The current in a rip is strongest and fastest next to the surface of the water. Rip currents can be hazardous to people in the water. Swimmers who are caught in a rip current and who do not understand what is happening, or who may not have the necessary water skills, may panic, or they may exhaust themselves by trying to swim directly against the flow of water. Because of these factors, rip currents are the leading cause of rescues by lifeguards at beaches, and in the United States, they are the cause of an average of 46 deaths by drowning per year. A rip current is not the same thing as undertow, although some people use the term incorrectly whe ...
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Outer Banks
The Outer Banks (frequently abbreviated OBX) are a string of barrier islands and spits off the coast of North Carolina and southeastern Virginia, on the east coast of the United States. They line most of the North Carolina coastline, separating Currituck Sound, Albemarle Sound, and Pamlico Sound from the Atlantic Ocean. A major tourist destination, the Outer Banks are known for their wide expanse of open beachfront and the Cape Hatteras National Seashore. The seashore and surrounding ecosystem are important biodiversity zones, including beach grasses and shrubland that help maintain the form of the land. The Outer Banks were sites of early European settlement in the United States and remain important economic and cultural sites. Most notably the English Roanoke Colony vanished from Roanoke Island in 1587 and was the first location where an English person, Virginia Dare, was born in the Americas. The hundreds of shipwrecks along the Outer Banks have given the surrounding seas th ...
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Coastal Erosion
Coastal erosion is the loss or displacement of land, or the long-term removal of sediment and rocks along the coastline due to the action of waves, currents, tides, wind-driven water, waterborne ice, or other impacts of storms. The landward retreat of the shoreline can be measured and described over a temporal scale of tides, seasons, and other short-term cyclic processes. Coastal erosion may be caused by hydraulic action, abrasion, impact and corrosion by wind and water, and other forces, natural or unnatural. On non-rocky coasts, coastal erosion results in rock formations in areas where the coastline contains rock layers or fracture zones with varying resistance to erosion. Softer areas become eroded much faster than harder ones, which typically result in landforms such as tunnels, bridges, columns, and pillars. Over time the coast generally evens out. The softer areas fill up with sediment eroded from hard areas, and rock formations are eroded away. Also erosion commonly ...
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Canadian Hurricane Centre
The Canadian Hurricane Centre (CHC; french: Centre canadien de prévision des ouragans) is an organisation that monitors and warns of the threat of tropical cyclones such as hurricanes and tropical storms. CHC is a division of the Meteorological Service of Canada, which is in turn an agency of Environment Canada. Founded in 1987, CHC provides guidance to MSC's weather centres in eastern and Atlantic Canada, and is based in Dartmouth, Nova Scotia. CHC frequently consults with its United States counterpart, the National Hurricane Center in Miami, to coordinate the tracks and positions of storms that pose a threat to Canada. History 1985's Hurricane Gloria and its less-than-expected damage prompted Environment Canada to create the CHC due to confusion between information received from the US National Hurricane Centre and US media and on-the-ground information and observations. Its first hurricane warnings were issued in 2008 for Hurricane Kyle, which struck near Yarmouth, Nova Scoti ...
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Hurricane Bertha (1990)
Hurricane Bertha caused minor damage in the United States, Bermuda, and Atlantic Canada in July and August 1990. The third tropical cyclone, second named storm, and first hurricane of the 1990 Atlantic hurricane season, Bertha developed from a frontal low pressure area offshore of North Carolina on July 24. Initially subtropical, it slowly acquired tropical characteristics while tracked southeast and then southwestward. By early on July 27, the cyclone was re-classified as a tropical depression. Following its transition, the depression intensified and was upgraded to Tropical Storm Bertha on July 28. The storm then curved northeastward and rapidly strengthened. Bertha became a hurricane early on July 29, though it weakened back to a tropical storm later that day. On the following day, Bertha re-intensified into a hurricane and peaked as an Category 1 hurricane on July 31. Early on August 2, Bertha made landfall near Sydney, Nova Scotia ...
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Gulf Of Saint Lawrence
, image = Baie de la Tour.jpg , alt = , caption = Gulf of St. Lawrence from Anticosti National Park, Quebec , image_bathymetry = Golfe Saint-Laurent Depths fr.svg , alt_bathymetry = Bathymetry of the Gulf of St. Lawrence , caption_bathymetry = Bathymetry of the Gulf of St. Lawrence , location = , group = , coordinates = , type = Gulf , etymology = , part_of = , inflow = , rivers = , outflow = , oceans = , catchment = , basin_countries = CanadaSaint Pierre and Miquelon (France) , agency = , designation = , date-built = , engineer = , date-flooded = , length = , width = , area = , depth = , max-depth = , volume = , residence_time = , salinity ...
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National Hurricane Center
The National Hurricane Center (NHC) is the division of the United States' NOAA/National Weather Service responsible for tracking and predicting tropical weather systems between the Prime Meridian and the 140th meridian west poleward to the 30th parallel north in the northeast Pacific Ocean and the 31st parallel north in the northern Atlantic Ocean. The agency, which is co-located with the Miami branch of the National Weather Service, is situated on the campus of Florida International University in Westchester, Florida. The NHC's Tropical Analysis and Forecast Branch (TAFB) routinely issues marine forecasts, in the form of graphics and high seas forecasts year round, with the Ocean Prediction Center having backup responsibility for this unit. The Technology and Science Branch (TSB) provides technical support for the center, which includes new infusions of technology from abroad. The Chief, Aerial Reconnaissance Coordination, All Hurricanes (CARCAH) unit tasks planes, for r ...
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Anticyclone
An anticyclone is a weather phenomenon defined as a large-scale circulation of winds around a central region of high atmospheric pressure, clockwise in the Northern Hemisphere and counterclockwise in the Southern Hemisphere as viewed from above (opposite to a cyclone). Effects of surface-based anticyclones include clearing skies as well as cooler, drier air. Fog can also form overnight within a region of higher pressure. Mid-tropospheric systems, such as the subtropical ridge, deflect tropical cyclones around their periphery and cause a temperature inversion inhibiting free convection near their center, building up surface-based haze under their base. Anticyclones aloft can form within warm-core lows such as tropical cyclones, due to descending cool air from the backside of upper troughs such as polar highs, or from large-scale sinking such as a subtropical ridge. The evolution of an anticyclone depends upon variables such as its size, intensity, and extent of moist con ...
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Wind Shear
Wind shear (or windshear), sometimes referred to as wind gradient, is a difference in wind speed and/or direction over a relatively short distance in the atmosphere. Atmospheric wind shear is normally described as either vertical or horizontal wind shear. Vertical wind shear is a change in wind speed or direction with a change in altitude. Horizontal wind shear is a change in wind speed with a change in lateral position for a given altitude. Wind shear is a microscale meteorological phenomenon occurring over a very small distance, but it can be associated with mesoscale or synoptic scale weather features such as squall lines and cold fronts. It is commonly observed near microbursts and downbursts caused by thunderstorms, fronts, areas of locally higher low-level winds referred to as low-level jets, near mountains, radiation inversions that occur due to clear skies and calm winds, buildings, wind turbines, and sailboats. Wind shear has significant effects on the control of a ...
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