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2023 Jersey Tornado
Just before midnight on Wednesday, November 1, 2023, a tornado impacted the Isle of Jersey in the Channel Islands, a crown dependency of the United Kingdom. Associated with powerful extratropical cyclone Storm Ciaran, the tornado was subsequently rated T6 on the TORRO scale or IF3 on the International Fujita Scale, which is broadly analogous to the Enhanced Fujita Scale commonly used in the United States, making it the strongest tornado to hit the British Isles since the Birmingham Tornado in 2005. Meteorological synopsis The tornado was associated with a broader storm system, Storm Ciaran, an extremely powerful extratropical cyclone named by the UK's Met Office on the October 29, 2023. Red weather warnings for non-tornadic wind gusts in excess of 100 mph were already in force for the Channel Islands with schools closed and people told to stay at home. By 18:00 GMT, the leading edge of the storms precipitation in the form of a warm front had reached Jersey, bringing ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jersey
Jersey ( ; ), officially the Bailiwick of Jersey, is an autonomous and self-governing island territory of the British Islands. Although as a British Crown Dependency it is not a sovereign state, it has its own distinguishing civil and government institutions, so qualifies as a small nation or island country. Located in Northwestern Europe, off the coast of north-west France, it is the largest of the Channel Islands and is from Normandy's Cotentin Peninsula. The Bailiwick consists of the main island of Jersey and some surrounding uninhabited islands and rocks including Les Dirouilles, Les Écréhous, Les Minquiers, and Les Pierres de Lecq. Jersey was part of the Duchy of Normandy, whose dukes became kings of England from 1066. After Normandy was lost by the kings of England in the 13th century, and the ducal title surrendered to France, Jersey remained loyal to the English Crown, though it never became part of the Kingdom of England. At the end of the Napoleonic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cold Front
A cold front is the leading edge of a cooler mass of air at ground level that replaces a warmer mass of air and lies within a pronounced surface Trough (meteorology), trough of Low-pressure area, low pressure. It often forms behind an extratropical cyclone (to the west in the Northern Hemisphere, to the east in the Southern Hemisphere, Southern), at the leading edge of its cold air Advection#Meteorology, advection pattern—known as the cyclone's dry "conveyor belt" flow. Temperature differences across the boundary can exceed from one side to the other. When enough moisture is present, rain can occur along the boundary. If there is significant Convective instability, instability along the boundary, a Squall line, narrow line of thunderstorms can form along the frontal zone. If instability is weak, a broad shield of rain can move in behind the Weather front, front, and evaporative cooling of the rain can increase the temperature difference across the front. Cold fronts are stronger ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
St Clement, Jersey
St Clement (Jèrriais: ''Saint Cliément'') is one of the twelve parishes of Jersey in the Channel Islands. Its parish hall is around south-east of St Helier. The parish has a population of 9,221 and is the second most densely populated. Located on the south-east coast of the island, stretching from Le Dicq in the west to near La Rocque in the east, it is the smallest parish, with a surface area of just 2,440 vergées (4 km2). The parish is largely suburbanised, with a large spread of post-war low-density housing development. There is no easily definable centre to the parish. The parish hall, schools and church are located in different areas. The parish is also home to a number of sports facilities, such as FB Fields and St Clement's Golf Club. Toponymy In pre-Norman times, the area now known as St Clement was known as ''Petravilla'' or ''Pierreville''. This is named for Peter, a monk who gave his lands in St Clement to the Mont Saint-Michel abbey. The modern parish de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Forward-flank Downdraft
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 States ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Weather Radar
A weather radar, also called weather surveillance radar (WSR) and Doppler weather radar, is a type of radar used to locate precipitation (meteorology), precipitation, calculate its motion, and estimate its type (rain, snow, hail etc.). Modern weather radars are mostly pulse-Doppler radars, capable of detecting the motion of rain droplets in addition to the intensity of the precipitation. Both types of data can be analyzed to determine the structure of storms and their potential to cause severe weather. During Radar in World War II, World War II, radar operators discovered that weather was causing echoes on their screens, masking potential enemy targets. Techniques were developed to filter them, but scientists began to study the phenomenon. Soon after the war, military surplus, surplus radars were used to detect precipitation. Since then, weather radar has evolved and is used by national weather services, research departments in universities, and in television stations' weather d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hook Echo
A hook echo is a pendant or hook-shaped weather radar signature as part of some supercell thunderstorms. It is found in the lower portions of a storm as air and precipitation flow into a mesocyclone, resulting in a curved feature of reflectivity. The echo is produced by rain, hail, or debris being wrapped around the supercell. It is one of the classic hallmarks of tornado-producing supercells. The National Weather Service may consider the presence of a hook echo coinciding with a tornado vortex signature as sufficient to justify issuing a tornado warning. History Because of the unpredictable and potentially catastrophic nature of tornadoes, the possibility of detecting tornadoes via radar was discussed in the meteorological community in the earliest days of meteorological radar.Huff, F.A., H.W. Hiser, and S.G. Bigler, 1954Study of an Illinois tornado using radar, synoptic weather and field survey data Report of Investigation 22, Champaign, IL, pp. 73 The first association betwe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parishes Of Jersey
The parishes of Jersey (Jèrriais, Jerriais: ) are the civil and religious Administrative division, administrative districts of Jersey in the Channel Islands. There are twelve in total; all have access to the sea and share a name with their ancient parish churches. The parishes and the roles within their structures are ancient; some of the parishes perhaps date to the fifth century AD. They are governed by principles and customs that form part of the Norman customary law from which Jersey law originates. As such, many of the parish roles and structures have often been ill-defined. The main role of the modern parish is similar to local government structures in other countries, with the parishes having powers over waste collection, law enforcement and roads maintenance. These responsibilities are mostly shared with the States of Jersey, States. History Names Eleven of the twelve parishes are named for the saint of their parish church. The remaining parish's church does not h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
St Helier
St Helier (; Jèrriais: ; ) is the Capital city, capital of Jersey, the largest of the Channel Islands in the English Channel. It is the most populous of the twelve parishes of Jersey, with a population of 35,822, over one-third of the island's total population. The town of St Helier is the largest settlement and only town of Jersey. The town consists of the built-up areas of St Helier, including First Tower, and parts of the parishes of Saint Saviour, Jersey, St Saviour and Saint Clement, Jersey, St Clement, with further suburbs in surrounding parishes. The greater part of the parish of St Helier is rural. It covers a surface area of , being 9% of the total land area of the island (this includes Land reclamation, reclaimed land area of or 200 hectare, ha). The town sits by the coast in the southeastern corner of the parish. Within it lies the main commercial district and the principal harbour of the island. As the capital, it also hosts the island's government, parlia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
English Channel
The English Channel, also known as the Channel, is an arm of the Atlantic Ocean that separates Southern England from northern France. It links to the southern part of the North Sea by the Strait of Dover at its northeastern end. It is the busiest Sea lane, shipping area in the world. It is about long and varies in width from at its widest to at its narrowest in the Strait of Dover."English Channel". ''The Columbia Encyclopedia'', 2004. It is the smallest of the shallow seas around the continental shelf of Europe, covering an area of some . The Channel aided the United Kingdom in becoming a naval superpower, serving as a natural defence against invasions, such as in the Napoleonic Wars and in the World War II, Second World War. The northern, English coast of the Channel is more populous than the southern, French coast. The major languages spoken in this region are English language, English and French language, French. Names Roman historiography, Roman sources as (or , ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lightning
Lightning is a natural phenomenon consisting of electrostatic discharges occurring through the atmosphere between two electrically charged regions. One or both regions are within the atmosphere, with the second region sometimes occurring on the land, ground. Following the lightning, the regions become partially or wholly electrically neutralized. Lightning involves a near-instantaneous release of energy on a scale averaging between 200 megajoules and 7 gigajoules. The air around the lightning flash rapidly heats to temperatures of about . There is an emission of electromagnetic radiation across a wide range of wavelengths, some visible as a bright flash. Lightning also causes thunder, a sound from the shock wave which develops as heated gases in the vicinity of the discharge experience a sudden increase in pressure. The most common occurrence of a lightning event is known as a thunderstorm, though they can also commonly occur in other types of energetic weather systems, such ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cloud-to-ground Lightning
Lightning is a natural phenomenon consisting of electrostatic discharges occurring through the atmosphere between two electrically charged regions. One or both regions are within the atmosphere, with the second region sometimes occurring on the ground. Following the lightning, the regions become partially or wholly electrically neutralized. Lightning involves a near-instantaneous release of energy on a scale averaging between 200 megajoules and 7 gigajoules. The air around the lightning flash rapidly heats to temperatures of about . There is an emission of electromagnetic radiation across a wide range of wavelengths, some visible as a bright flash. Lightning also causes thunder, a sound from the shock wave which develops as heated gases in the vicinity of the discharge experience a sudden increase in pressure. The most common occurrence of a lightning event is known as a thunderstorm, though they can also commonly occur in other types of energetic weather systems, such as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saint-Brieuc
Saint-Brieuc (, Breton language, Breton: ''Sant-Brieg'' , Gallo language, Gallo: ''Saent-Berioec'') is a city in the Côtes-d'Armor Departments of France, department in Brittany (administrative region), Brittany in northwestern France. History Saint-Brieuc is named after a Wales, Welsh monk, Saint Brioc, Brioc, who Christianised the region in the 5th century and established an oratory there. Évêché de Saint-Brieuc, Bro Sant-Brieg/Pays de Saint-Brieuc, one of the nine traditional bishoprics of Brittany, which were used as administrative areas before the French Revolution, was named after Saint-Brieuc. It also dates from the Middle Ages when the ‘pays de Saint Brieuc’, or Penteur, was established by Duke Arthur II of Brittany as one of his eight ‘battles’ or administrative regions. Geography The town is located by the English Channel, on the Bay of Saint-Brieuc. Two rivers flow through Saint-Brieuc: the Goued/Gouët and the Gouedig/Gouédic. Other towns of notable siz ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
