103-621: The Light River ( Kaurna : Yarralinka ), commonly called the River Light , is a seasonal and significant river in the Mid North region of the Australian state of South Australia named for early surveyor William Light . The River Light has given its name to the region of the state spanning the mid and lower part of the watercourse, which doesn't dry up over summer. The County of Light (cadastral land division) lies either side of
206-519: A dialect of the Kadli language, along with Ngadjuri , Narungga , and Nukunu , and "Nantuwara", with kadli meaning "dog" in these varieties. However this name has not gained wide acceptance and is not recorded as a language in the AIATSIS AUSTLANG database. Luise Hercus and J. Simpson (2002, 2006) classify Kaurna as within the subgroup of Thura-Yura languages . The name "Kaurna"
309-576: A lightning storm , is a storm characterized by the presence of lightning and its acoustic effect on the Earth's atmosphere , known as thunder . Relatively weak thunderstorms are sometimes called thundershowers . Thunderstorms occur in a type of cloud known as a cumulonimbus . They are usually accompanied by strong winds and often produce heavy rain and sometimes snow , sleet , or hail , but some thunderstorms produce little precipitation or no precipitation at all. Thunderstorms may line up in
412-668: A thunderstorm in the large catchment can engender a severe flash flood . In the pioneering era, before bridges were built, these often caused drowning fatalities. Kaurna language Kaurna ( / ˈ ɡ ɑːr n ə / or / ˈ ɡ aʊ n ə / ) is a Pama-Nyungan language historically spoken by the Kaurna peoples of the Adelaide Plains of South Australia . The Kaurna peoples are made up of various tribal clan groups, each with their own parnkarra district of land and local dialect. These dialects were historically spoken in
515-570: A Kaurna language program was introduced into Kaurna Plains School in 1992. Elizabeth City High School and Elizabeth West Adult Campus introduced the teaching of the language in 1994, and other schools have followed suit. TAFE courses to train Kaurna language teachers were developed by Mary-Anne Gale. Kaurna linguistics courses have been taught at the University of Adelaide since 1997. and both Kaurna and non-Kaurna have been studying and speaking
618-651: A T0 for extremely weak tornadoes to T11 for the most powerful known tornadoes. Doppler radar data, photogrammetry , and ground swirl patterns (cycloidal marks) may also be analyzed to determine intensity and award a rating. Waterspouts have similar characteristics as tornadoes, characterized by a spiraling funnel-shaped wind current that form over bodies of water, connecting to large cumulonimbus clouds. Waterspouts are generally classified as forms of tornadoes, or more specifically, non- supercelled tornadoes that develop over large bodies of water. These spiralling columns of air frequently develop within tropical areas close to
721-481: A deviation in their course at a right angle to the wind shear direction. Thunderstorms result from the rapid upward movement of warm, moist air, sometimes along a front . However, some kind of cloud forcing , whether it is a front, shortwave trough, or another system is needed for the air to rapidly accelerate upward. As the warm, moist air moves upward, it cools, condenses , and forms a cumulonimbus cloud that can reach heights of over 20 kilometres (12 mi). As
824-416: A federal government grant, is under way to revise the spellings. Amery has been overseeing much of the work. It is intended that the final version will be released in print and in electronic form, including a phone app . In 2021, a printed Kaurna dictionary was published, as well as a Ngarrindjeri one. Amery and his wife, Ngarrindjeri linguist Mary-Anne Gale, have helped to drive the project. There has been
927-547: A growing number of Kaurna speakers in the 21st century. The first students of courses specially tailored to the teaching of Aboriginal language , run by Tauondi Aboriginal College in Port Adelaide , enabling those who have learnt the language to pass on their skills to communities, graduated in July 2021. With the teachers and students often in the older age group, by July 2022 two of the first graduates had died. There
1030-404: A high frequency for cloud-to-ground lightning, like Florida, lightning causes several fatalities per year, most commonly to people working outside. Acid rain is also a frequent risk produced by lightning. Distilled water has a neutral pH of 7. "Clean" or unpolluted rain has a slightly acidic pH of about 5.2, because carbon dioxide and water in the air react together to form carbonic acid ,
1133-500: A local thunderstorm. During a thunderstorm, pollen grains can absorb moisture and then burst into much smaller fragments with these fragments being easily dispersed by wind. While larger pollen grains are usually filtered by hairs in the nose, the smaller pollen fragments are able to pass through and enter the lungs, triggering the asthma attack. Most thunderstorms come and go fairly uneventfully; however, any thunderstorm can become severe , and all thunderstorms, by definition, present
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#17327912169011236-514: A prominent feature and tracking it from scan to scan. A back-building thunderstorm, commonly referred to as a training thunderstorm , is a thunderstorm in which new development takes place on the upwind side (usually the west or southwest side in the Northern Hemisphere ), such that the storm seems to remain stationary or propagate in a backward direction. Though the storm often appears stationary on radar, or even moving upwind, this
1339-445: A series or become a rainband , known as a squall line . Strong or severe thunderstorms include some of the most dangerous weather phenomena, including large hail, strong winds, and tornadoes . Some of the most persistent severe thunderstorms, known as supercells , rotate as do cyclones. While most thunderstorms move with the mean wind flow through the layer of the troposphere that they occupy, vertical wind shear sometimes causes
1442-488: A sketch grammar , hundreds of phrases and sentences along with English translations, traditional songlines , and textual illustrations of differences among dialects. They also created Kaurna translations of six German hymns as well as the Ten Commandments . Other Europeans such as William Wyatt , William Williams , William Cawthorne and Matthew Moorhouse were interested in the people and learnt some of
1545-569: A storm arises quickly and unexpectedly. Preparing the home by removing dead or rotting limbs and trees, which can be blown over in high winds, can also significantly reduce the risk of property damage and personal injury. The National Weather Service (NWS) in the United States recommends several precautions that people should take if thunderstorms are likely to occur: While safety and preparedness often overlap, "thunderstorm safety" generally refers to what people should do during and after
1648-421: A storm. The American Red Cross recommends that people follow these precautions if a storm is imminent or in progress: The NWS stopped recommending the "lightning crouch" in 2008 as it does not provide a significant level of protection and will not significantly lower the risk of being killed or injured from a nearby lightning strike. Thunderstorms occur throughout the world, even in the polar regions, with
1751-683: A weak acid (pH 5.6 in distilled water), but unpolluted rain also contains other chemicals. Nitric oxide present during thunderstorm phenomena, caused by the oxidation of atmospheric nitrogen, can result in the production of acid rain, if nitric oxide forms compounds with the water molecules in precipitation, thus creating acid rain. Acid rain can damage infrastructures containing calcite or certain other solid chemical compounds. In ecosystems, acid rain can dissolve plant tissues of vegetations and increase acidification process in bodies of water and in soil , resulting in deaths of marine and terrestrial organisms. Any thunderstorm that produces hail that reaches
1854-465: Is a polar molecule that can carry a charge, so it is capable of creating the charge separation needed to produce lightning). These electrical discharges can be up to a thousand times more powerful than lightning on the Earth. The water clouds can form thunderstorms driven by the heat rising from the interior. The clouds of Venus may also be capable of producing lightning ; some observations suggest that
1957-596: Is a complex of thunderstorms that becomes organized on a scale larger than the individual thunderstorms but smaller than extratropical cyclones , and normally persists for several hours or more. A mesoscale convective system's overall cloud and precipitation pattern may be round or linear in shape, and include weather systems such as tropical cyclones , squall lines , lake-effect snow events, polar lows , and mesoscale convective complexes (MCCs), and they generally form near weather fronts . Most mesoscale convective systems develop overnight and continue their lifespan through
2060-413: Is a need for more funding and more teachers. Kaurna Warra Pintyanthi (meaning "creating Kaurna language") is a group developing and promoting the recovery of the Kaurna language. It was established in 2002 by two Kaurna elders , Lewis Yerloburka O'Brien and Alitya Wallara Rigney , and linguist Robert Amery . The group now includes other Kaurna people, teachers, linguists and language enthusiasts. It
2163-537: Is a table of some of these cases. Kaurna has 3 numbers: singular , dual (-rla, -dla) and plural (-rna). Efforts to reintroduce Kaurna names, beginning in 1980 with the naming of Warriappendi School, in 1980 by Auntie Leila Rankine , have been made within the public domain. Since the Adelaide City Council drew up a Reconciliation Vision Statement in 1997, they committed to a dual naming project, working with Kaurna Warra Pintyanthi, to cover
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#17327912169012266-435: Is an illusion. The storm is really a multi-cell storm with new, more vigorous cells that form on the upwind side, replacing older cells that continue to drift downwind. When this happens, catastrophic flooding is possible. In Rapid City, South Dakota , in 1972, an unusual alignment of winds at various levels of the atmosphere combined to produce a continuously training set of cells that dropped an enormous quantity of rain upon
2369-537: Is available on the Council website. Between 1980 and 2012, around 1000 entities were assigned Kaurna names, including people, pets, organisations, buildings, parks, walking trails, an allele (a hereditary gene or chromosome), brand names, and the Kari Munaintya tram and Tindo solar bus. Some place names are known from historical sources, but not officially used as yet, such as Patpangga ( Rapid Bay ) "in
2472-474: Is issued if a thunderstorm becomes severe, or will soon turn severe. In Canada, a rainfall rate greater than 50 millimetres (2 in) in one hour, or 75 millimetres (3 in) in three hours, is also used to indicate severe thunderstorms. Severe thunderstorms can occur from any type of storm cell. However, multicell , supercell , and squall lines represent the most common forms of thunderstorms that produce severe weather. A mesoscale convective system (MCS)
2575-556: Is known, then the total energy of a thunderstorm can be calculated. In a typical thunderstorm, approximately 5×10 kg of water vapor are lifted, and the amount of energy released when this condenses is 10 joules . This is on the same order of magnitude of energy released within a tropical cyclone, and more energy than that released during the atomic bomb blast at Hiroshima, Japan in 1945 . The Fermi Gamma-ray Burst Monitor results show that gamma rays and antimatter particles ( positrons ) can be generated in powerful thunderstorms. It
2678-525: Is little wind shear , the storm will rapidly enter the dissipating stage and 'rain itself out', but, if there is sufficient change in wind speed or direction, the downdraft will be separated from the updraft, and the storm may become a supercell , where the mature stage can sustain itself for several hours. In the dissipation stage, the thunderstorm is dominated by the downdraft. If atmospheric conditions do not support super cellular development, this stage occurs rather quickly, approximately 20–30 minutes into
2781-422: Is mainly inflicted by downburst winds, large hailstones, and flash flooding caused by heavy precipitation . Stronger thunderstorm cells are capable of producing tornadoes and waterspouts . There are three types of thunderstorms: single-cell , multi-cell , and supercell . Supercell thunderstorms are the strongest and most severe. Mesoscale convective systems formed by favorable vertical wind shear within
2884-404: Is managed by the Kaurna people. Kaurna had not been spoken as a native language since the Kaurna people had been pushed out of their traditional lands since the colonisation of South Australia in the 19th century, with the population in decline due to various factors. Ivaritji ( c. 1849 – 1929) was the last known speaker, but it was probably last only widely spoken in the early 1860s. In
2987-468: Is more of a factor with thunderstorms with heavy precipitation (HP) than with thunderstorms with low precipitation (LP). When thunderstorms merge, which is most likely when numerous thunderstorms exist in proximity to each other, the motion of the stronger thunderstorm normally dictates the future motion of the merged cell. The stronger the mean wind, the less likely other processes will be involved in storm motion. On weather radar , storms are tracked by using
3090-741: Is not falling through the updraft) with a strong, rotating updraft (a " mesocyclone "). These storms normally have such powerful updrafts that the top of the supercell storm cloud (or anvil) can break through the troposphere and reach into the lower levels of the stratosphere . Supercell storms can be 24 kilometres (15 mi) wide. Research has shown that at least 90 percent of supercells cause severe weather . These storms can produce destructive tornadoes , extremely large hailstones (10 centimetres or 4 inches diameter), straight-line winds in excess of 130 km/h (81 mph), and flash floods . In fact, research has shown that most tornadoes occur from this type of thunderstorm. Supercells are generally
3193-412: Is one of the most significant thunderstorm hazards to aircraft. When hail stones exceed 13 millimetres (0.5 in) in diameter, planes can be seriously damaged within seconds. The hailstones accumulating on the ground can also be hazardous to landing aircraft. Wheat, corn, soybeans, and tobacco are the most sensitive crops to hail damage. Hail is one of Canada's most costly hazards. Hailstorms have been
Light River (South Australia) - Misplaced Pages Continue
3296-411: Is suggested that the antimatter positrons are formed in terrestrial gamma-ray flashes (TGF). TGFs are brief bursts occurring inside thunderstorms and associated with lightning. The streams of positrons and electrons collide higher in the atmosphere to generate more gamma rays. About 500 TGFs may occur every day worldwide, but mostly go undetected. In more contemporary times, thunderstorms have taken on
3399-586: Is the most common type of thunderstorm development. Mature thunderstorms are found near the center of the cluster, while dissipating thunderstorms exist on their downwind side. Multicell storms form as clusters of storms but may then evolve into one or more squall lines . While each cell of the cluster may only last 20 minutes, the cluster itself may persist for hours at a time. They often arise from convective updrafts in or near mountain ranges and linear weather boundaries, such as strong cold fronts or troughs of low pressure. These type of storms are stronger than
3502-437: Is usually caused by the heavy liquid precipitation that accompanies it. Flash floods are most common in arid regions as well as densely populated urban environments, where few plants, and bodies of water are present to absorb and contain the extra water. Flash flooding can be hazardous to small infrastructure, such as bridges, and weakly constructed buildings. Plants and crops in agricultural areas can be destroyed and devastated by
3605-468: The Burra copper mines to Adelaide the upper reaches above Hamilton were commonly known by them as The Dirty Light , gaining this unflattering epithet from the deep mud they encountered in crossing it. This name then became ordinarily accepted for several decades thereafter, even by the government of the day. The lower reaches are normally quiet, with peaceful chains of ponds in summer. However, at any time
3708-666: The Doppler on Wheels , vehicles with mounted automated weather stations , weather balloons , and unmanned aircraft to investigate thunderstorms expected to produce severe weather. Lightning is detected remotely using sensors that detect cloud-to-ground lightning strokes with 95 percent accuracy in detection and within 250 metres (820 ft) of their point of origin. Thunderstorms strongly influenced many early civilizations. Greeks believed that they were battles waged by Zeus , who hurled lightning bolts forged by Hephaestus . Some American Indian tribes associated thunderstorms with
3811-490: The Earth's atmosphere . In the mature stage of a thunderstorm, the warmed air continues to rise until it reaches an area of warmer air and can rise no farther. Often this 'cap' is the tropopause . The air is instead forced to spread out, giving the storm a characteristic anvil shape. The resulting cloud is called cumulonimbus incus . The water droplets coalesce into larger and heavier droplets and freeze to become ice particles. As these fall, they melt to become rain. If
3914-438: The Earth's atmosphere . Weaker thunderstorms are steered by winds closer to the Earth's surface than stronger thunderstorms, as the weaker thunderstorms are not as tall. Organized, long-lived thunderstorm cells and complexes move at a right angle to the direction of the vertical wind shear vector. If the gust front, or leading edge of the outflow boundary, races ahead of the thunderstorm, its motion will accelerate in tandem. This
4017-578: The Gilbert River . The latter is a major tributary, merging into the Light River just below Hamley Bridge. The indigenous name for the river is Yarralinka . The upper half of the Light River lies within the traditional lands of the indigenous Ngadjuri people of the Mid North, while much of the lower half is within the territory of the Kaurna people of the Adelaide Plains . The river
4120-560: The Gulf St Vincent through a mangrove estuary . The river descends 447 metres (1,467 ft) over its 164-kilometre (102 mi) course. The Light River has an expansive catchment within mainly undulating hills, much cleared since European settlement for farming and grazing purposes. There are no geological features that would permit a significant dam or reservoir . The noteworthy tributaries, by descending elevation, are Tothill Creek, Julia Creek, Pine Creek, St Kitts Creek, and
4223-655: The Rocky Mountains as part of the North American Monsoon regime. In the Northeast , storms take on similar characteristics and patterns as the Midwest, but with less frequency and severity. During the summer, air-mass thunderstorms are an almost daily occurrence over central and southern parts of Florida. If the quantity of water that is condensed in and subsequently precipitated from a cloud
Light River (South Australia) - Misplaced Pages Continue
4326-529: The Thunderbird , who they believed was a servant of the Great Spirit . The Norse considered thunderstorms to occur when Thor went to fight Jötnar , with the thunder and lightning being the effect of his strikes with the hammer Mjölnir . Hinduism recognizes Indra as the god of rain and thunderstorms. Christian doctrine accepts that fierce storms are the work of God. These ideas were still within
4429-550: The United States rainfall climatology over the Great Plains since they bring the region about half of their annual warm season rainfall. The two major ways thunderstorms move are via advection of the wind and propagation along outflow boundaries towards sources of greater heat and moisture. Many thunderstorms move with the mean wind speed through the Earth's troposphere , the lowest 8 kilometres (5.0 mi) of
4532-668: The city centre and North Adelaide , including the five public squares and Adelaide park lands . Victoria Square , in the centre of Adelaide city, is now also known as Tarntanyangga , all 29 Parks around the city have been assigned a Kaurna name, and the River Torrens is now also named Karrawirra Parri . The renaming of 39 sites was finalised and endorsed by the council in 2012. Others include Piltawodli (now Pirltawardli ), " brushtail possum home"; Warriparringga ( Warriparinga ) "windy river place". The full list of square and park names, along with meanings and pronunciations,
4635-437: The equator , but are less common within areas of high latitude . Flash flooding is the process where a landscape, most notably an urban environment, is subjected to rapid floods. These rapid floods occur more quickly and are more localized than seasonal river flooding or areal flooding and are frequently (though not always) associated with intense rainfall. Flash flooding can frequently occur in slow-moving thunderstorms and
4738-418: The lifted index can be used to assist in determining potential upward vertical development of clouds. Generally, thunderstorms require three conditions in order to form: All thunderstorms, regardless of type, go through three stages: the developing stage , the mature stage , and the dissipation stage . The average thunderstorm has a 24 km (15 mi) diameter. Depending on the conditions present in
4841-504: The water vapor in that rising air condenses . When the moisture condenses, it releases energy known as latent heat of condensation, which allows the rising packet of air to cool less than the cooler surrounding air continuing the cloud's ascension. If enough instability is present in the atmosphere, this process will continue long enough for cumulonimbus clouds to form and produce lightning and thunder . Meteorological indices such as convective available potential energy (CAPE) and
4944-475: The 18th century. Beyond the Earth's atmosphere, thunderstorms have also been observed on the planets of Jupiter , Saturn , Neptune , and, probably, Venus . Warm air has a lower density than cool air, so warmer air rises upwards and cooler air will settle at the bottom (this effect can be seen with a hot air balloon ). Clouds form as relatively warmer air, carrying moisture, rises within cooler air. The moist air rises, and, as it does so, it cools and some of
5047-468: The 1980s, Kaurna people who had moved back into the Adelaide Plains area began to learn and use their language again. Robert Amery , head of Linguistics at the University of Adelaide , who has devoted much of his life and career to Indigenous languages, in particular Kaurna: "After more than 25 years of painstaking effort, there are now several Kaurna people who can conduct a conversation in Kaurna without resorting to English too quickly, and we are seeing
5150-481: The Earth's surface, occasionally causing strong winds that are commonly associated with thunderstorms. Thunderstorms can form and develop in any geographic location but most frequently within the mid-latitude , where warm, moist air from tropical latitudes collides with cooler air from polar latitudes. Thunderstorms are responsible for the development and formation of many severe weather phenomena, which can be potentially hazardous. Damage that results from thunderstorms
5253-634: The Kaurna people while the language was dormant. The Kaurna Warra Karrpanthi Aboriginal Corporation (KWK) was registered in 2013 to support the reclamation and promotion of the language of the Kaurna nation, including training and teaching. In 2022 a dictionary written by Rob Amery and co-authors Susie Greenwood and Jasmin Morley was published. It includes not only the words included on the handwritten lists made by Teichelmann and Schürmann 160 years earlier, but also 4,000 new words that were created in consultation with local elders and Kaurna speakers. The cover
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#17327912169015356-621: The Secondary Towns Association in London took out the River Light Special Survey on 3 December 1841, through their Adelaide agents John Morphett and John Hill . This speculative venture was doomed when the following year copper ore was discovered nearby, giving rise to Kapunda . Today, Victoria is a quiet farming locality. In the late 1840s and early 1850s when bullock teamsters carted ore from
5459-546: The area bounded by Crystal Brook and Clare in the north, Cape Jervis in the south, and just over the Mount Lofty Ranges . Kaurna ceased to be spoken on an everyday basis in the 19th century and the last known native speaker, Ivaritji , died in 1929. Language revival efforts began in the 1980s, with the language now frequently used for ceremonial purposes, such as dual naming and welcome to country ceremonies. Robert M. W. Dixon (2002) classified Kaurna as
5562-589: The atmosphere, each of these three stages take an average of 30 minutes. The first stage of a thunderstorm is the cumulus stage or developing stage. During this stage, masses of moisture are lifted upwards into the atmosphere. The trigger for this lift can be solar illumination , where the heating of the ground produces thermals , or where two winds converge forcing air upwards, or where winds blow over terrain of increasing elevation. The moisture carried upward cools into liquid drops of water due to lower temperatures at high altitude, which appear as cumulus clouds. As
5665-764: The back edge of the rain shield associated with mature squall lines, a wake low can form, which is a mesoscale low pressure area that forms behind the mesoscale high pressure system normally present under the rain canopy, which are sometimes associated with a heat burst . This kind of storm is also known as "Wind of the Stony Lake" ( simplified Chinese : 石湖风 ; traditional Chinese : 石湖風 ; shi2 hu2 feng1) in southern China. Supercell storms are large, usually severe , quasi-steady-state storms that form in an environment where wind speed or wind direction varies with height (" wind shear "), and they have separate downdrafts and updrafts (i.e., where its associated precipitation
5768-402: The bulk of the occurrences from May through September. Cheyenne, Wyoming , is North America's most hail-prone city with an average of nine to ten hailstorms per season. In South America, areas prone to hail are cities like Bogotá, Colombia. Hail can cause serious damage, notably to automobiles , aircraft, skylights, glass-roofed structures, livestock, and most commonly, farmers' crops . Hail
5871-510: The cause of costly and deadly events throughout history. One of the earliest recorded incidents occurred around the 9th century in Roopkund , Uttarakhand, India. The largest hailstone in terms of maximum circumference and length ever recorded in the United States fell in 2003 in Aurora, Nebraska , United States. A tornado is a violent, rotating column of air in contact with both the surface of
5974-405: The colonists as "King John"), was one of Lutheran missionaries Christian Teichelmann and Clamor Schürmann 's main sources. Encounter Bay Bob , as his name suggests, came from Encounter Bay (Victor Harbor) and was most likely a fully initiated elder Ramindjeri man. Thus "Meyunna" is probably an endonym and would linguistically be preferable as the name for this language group, as suggested in
6077-431: The danger of lightning . Thunderstorm preparedness and safety refers to taking steps before, during, and after a thunderstorm to minimize injury and damage. Preparedness refers to precautions that should be taken before a thunderstorm. Some preparedness takes the form of general readiness (as a thunderstorm can occur at any time of the day or year). Preparing a family emergency plan, for example, can save valuable time if
6180-497: The development of organized convection. This term technically applies to a single thunderstorm with one main updraft. Also known as air-mass thunderstorms , these are the typical summer thunderstorms in many temperate locales. They also occur in the cool unstable air that often follows the passage of a cold front from the sea during winter. Within a cluster of thunderstorms, the term "cell" refers to each separate principal updraft. Thunderstorm cells occasionally form in isolation, as
6283-637: The earth and a cumulonimbus cloud (otherwise known as a thundercloud) or, in rare cases, the base of a cumulus cloud . Tornadoes come in many sizes but are typically in the form of a visible condensation funnel , whose narrow end touches the earth and is often encircled by a cloud of debris and dust . Most tornadoes have wind speeds between 40 and 110 mph (64 and 177 km/h), are approximately 75 metres (246 ft) across, and travel several kilometers (a few miles) before dissipating. Some attain wind speeds of more than 300 mph (480 km/h), stretch more than 1,600 metres (1 mi) across, and stay on
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#17327912169016386-490: The exception of ⟨rd⟩ /ɾ/ . Pre-stopped consonants are preceded by ⟨d⟩ . Below are the consonants of Kaurna (Amery, R & Simpson, J 2013 ). Kaurna places primary stress on the first syllable. Kaurna has relatively free word order . Kaurna uses a range of suffixed case markers to convey information including subjects, objects, spacio-temporal state and other such information. These sometimes have variations in pronunciation and spelling. Below
6489-459: The first semi-native speakers of Kaurna emerging". Kaurna is now frequently used to give Welcomes to Country . Sustained efforts to revive the language in from 1989 included the writing of several Kaurna songs originally written in the Ngarrindjeri , Narungga and Kaurna languages. A second songbook, Kaurna Paltinna , was published in 1999. Following one-off workshops in 1990 and 1991,
6592-618: The first wordlist of the language, containing 168 words, after calling in at the Gulf St Vincent en route to Western Australia in 1826, before the colony of South Australia had been established. His sources were listed as Harry and Sally. Schürmann and Teichelmann, who ran a school at Piltawodli , gained most of their knowledge of the language from three respected elders : Mullawirraburka ("King John" / "Onkaparinga Jack"), Kadlitpinna ("Captain Jack") and Ityamaiitpinna ("[King Rodney"). The two missionaries recorded around about 3000 words,
6695-429: The force exerted by downburst winds. Downburst winds are usually formed in areas when high pressure air systems of downdrafts begin to sink and displace the air masses below it, due to their higher density. When these downdrafts reach the surface, they spread out and turn into the destructive straight-horizontal winds. Thunderstorm asthma is the triggering of an asthma attack by environmental conditions directly caused by
6798-739: The force of raging water. Automobiles parked within affected areas can also be displaced. Soil erosion can occur as well, exposing risks of landslide phenomena. Downburst winds can produce numerous hazards to landscapes experiencing thunderstorms. Downburst winds are generally very powerful, and are often mistaken for wind speeds produced by tornadoes, due to the concentrated amount of force exerted by their straight-horizontal characteristic. Downburst winds can be hazardous to unstable, incomplete, or weakly constructed infrastructures and buildings. Agricultural crops, and other plants in nearby environments can be uprooted and damaged. Aircraft engaged in takeoff or landing can crash. Automobiles can be displaced by
6901-427: The form of strong straight-line winds can be expected in areas where the squall line itself is in the shape of a bow echo , within the portion of the line that bows out the most. Tornadoes can be found along waves within a line echo wave pattern , or LEWP, where mesoscale low pressure areas are present. Some bow echoes in the summer are called derechos , and move quite fast through large sections of territory. On
7004-589: The greatest frequency in tropical rainforest areas, where they may occur nearly daily. At any given time, approximately 2,000 thunderstorms are occurring on Earth. Kampala and Tororo in Uganda have each been mentioned as the most thunderous places on Earth, a claim also made for Singapore and Bogor on the Indonesian island of Java . Other cities known for frequent storm activity include Darwin , Caracas, Manila and Mumbai . Thunderstorms are associated with
7107-478: The ground for more than 100 kilometres (dozens of miles). The Fujita scale and the Enhanced Fujita Scale rate tornadoes by damage caused. An EF0 tornado, the weakest category, damages trees but does not cause significant damage to structures. An EF5 tornado, the strongest category, rips buildings off their foundations and can deform large skyscrapers. The similar TORRO scale ranges from
7210-449: The ground is known as a hailstorm. Thunderclouds that are capable of producing hailstones are often seen obtaining green coloration. Hail is more common along mountain ranges because mountains force horizontal winds upwards (known as orographic lifting ), thereby intensifying the updrafts within thunderstorms and making hail more likely. One of the more common regions for large hail is across mountainous northern India, which reported one of
7313-410: The highest hail-related death tolls on record in 1888. China also experiences significant hailstorms. Across Europe, Croatia experiences frequent occurrences of hail. In North America, hail is most common in the area where Colorado , Nebraska , and Wyoming meet, known as "Hail Alley". Hail in this region occurs between the months of March and October during the afternoon and evening hours, with
7416-402: The instability and relative wind conditions at different layers of the atmosphere (" wind shear "). Single-cell thunderstorms form in environments of low vertical wind shear and last only 20–30 minutes. Organized thunderstorms and thunderstorm clusters/lines can have longer life cycles as they form in environments of significant vertical wind shear, normally greater than 25 knots (13 m/s) in
7519-404: The language. The records, including an extensive vocabulary and grammar, compiled by Teichelmann and Schürmann in the 1840s have proven valuable in projects to reconstruct the language. The Kaurna Learners' Guide ( Kulurdu Marni Ngathaitya ) was published in 2013, and Kaurna radio shows have been broadcast since 2012. The Kaurna Dictionary Project at the University of Adelaide , funded by
7622-726: The language; several wrote about the "Adelaide Tribe" in their memoirs. Williams created a list of 377 Kaurna words, published in the Southern Australian on 15 May 1839 and republished in The South Australian Colonist on 14 July 1840. His work entitled A vocabulary of the language of the Aborigines of the Adelaide district, and other friendly tribes, of the Province of South Australia
7725-532: The life of the thunderstorm. The downdraft will push down out of the thunderstorm, hit the ground and spread out. This phenomenon is known as a downburst . The cool air carried to the ground by the downdraft cuts off the inflow of the thunderstorm, the updraft disappears and the thunderstorm will dissipate. Thunderstorms in an atmosphere with virtually no vertical wind shear weaken as soon as they send out an outflow boundary in all directions, which then quickly cuts off its inflow of relatively warm, moist air, and kills
7828-609: The lowest 6 kilometres (3.7 mi) of the troposphere , which aids the development of stronger updrafts as well as various forms of severe weather. The supercell is the strongest of the thunderstorms, most commonly associated with large hail, high winds, and tornado formation. Precipitable water values of greater than 31.8 millimetres (1.25 in) favor the development of organized thunderstorm complexes. Those with heavy rainfall normally have precipitable water values greater than 36.9 millimetres (1.45 in). Upstream values of CAPE of greater than 800 J/kg are usually required for
7931-453: The mainstream as late as the 18th century. Martin Luther was out walking when a thunderstorm began, causing him to pray to God for being saved and promising to become a monk. Thunderstorms, evidenced by flashes of lightning , on Jupiter have been detected and are associated with clouds where water may exist as both a liquid and ice, suggesting a mechanism similar to that on Earth. (Water
8034-663: The mid-1990s. However, they are now universally known as the Kaurna people. Library of Congress Subject Headings gives the following variant names (all followed by "language"): Adelaide; Coorna; Gauna; Gaurna; Gawurna; Kaura; Kawurna. The Endangered Languages Project names the following alternatives: Kaura, Coorna, Koornawarra, Nganawara, Kurumidlanta, Milipitingara, Widninga, Winnaynie, Meyu, Winaini, Winnay-nie, Wakanuwan, Adelaide tribe, Warra, Warrah, Karnuwarra, Jaitjawar:a, Padnaindi, Padnayndie, Medaindi, Medain-die, Merildekald, Merelde, Gaurna, Nantuwara, Nantuwaru, Meljurna, Midlanta. French explorer Joseph Paul Gaimard recorded
8137-675: The most powerful thunderstorms over the United States occur in the Midwest and the Southern states . These storms can produce large hail and powerful tornadoes. Thunderstorms are relatively uncommon along much of the West Coast of the United States , but they occur with greater frequency in the inland areas, particularly the Sacramento and San Joaquin Valleys of California. In spring and summer, they occur nearly daily in certain areas of
8240-542: The next day. They tend to form when the surface temperature varies by more than 5 °C (9 °F) between day and night. The type that forms during the warm season over land has been noted across North America, Europe, and Asia, with a maximum in activity noted during the late afternoon and evening hours. Forms of MCS that develop in the tropics are found in use either the Intertropical Convergence Zone or monsoon troughs , generally within
8343-526: The occurrence of one thunderstorm can develop an outflow boundary that sets up new thunderstorm development. Such storms are rarely severe and are a result of local atmospheric instability; hence the term "air mass thunderstorm". When such storms have a brief period of severe weather associated with them, it is known as a pulse severe storm. Pulse severe storms are poorly organized and occur randomly in time and space, making them difficult to forecast. Single-cell thunderstorms normally last 20–30 minutes. This
8446-464: The original name for Adelaide. The annual Tarnanthi Festival of Contemporary Aboriginal and Torres Strait Islander Art takes its name from the Kaurna word meaning "to rise, come forth, spring up or appear". Many prominent South Australian place names are drawn from the Kaurna language: English-Kaurna hybridised placenames include: Possible Kaurna placenames include: Thunderstorm A thunderstorm , also known as an electrical storm or
8549-498: The phenomena of thunderstorms and have numerous hazards towards landscapes and populations. One of the more significant hazards lightning can pose is the wildfires they are capable of igniting. Under a regime of low precipitation (LP) thunderstorms, where little precipitation is present, rainfall cannot prevent fires from starting when vegetation is dry as lightning produces a concentrated amount of extreme heat. Direct damage caused by lightning strikes occurs on occasion. In areas with
8652-426: The rising air reaches its dew point temperature, water vapor condenses into water droplets or ice, reducing pressure locally within the thunderstorm cell. Any precipitation falls the long distance through the clouds towards the Earth's surface. As the droplets fall, they collide with other droplets and become larger. The falling droplets create a downdraft as it pulls cold air with it, and this cold air spreads out at
8755-557: The river for much of its course and gave rise to the name of three former local government bodies within the land division: the District Council of Light (1867–1892) , the District Council of Light (1977–1996) , and the present-day Light Regional Council , established in 1996. The locality of Lower Light spans the area where the river meets the coast in the Adelaide Plains and the Adelaide Plains Council
8858-497: The role of a scientific curiosity. Every spring, storm chasers head to the Great Plains of the United States and the Canadian Prairies to explore the scientific aspects of storms and tornadoes through use of videotaping. Radio pulses produced by cosmic rays are being used to study how electric charges develop within thunderstorms. More organized meteorological projects such as VORTEX2 use an array of sensors, such as
8961-508: The same area, resulting in devastating flash flooding . A similar event occurred in Boscastle , England, on 16 August 2004, and over Chennai on 1 December 2015. Each year, many people are killed or seriously injured by severe thunderstorms despite the advance warning . While severe thunderstorms are most common in the spring and summer, they can occur at just about any time of the year. Cloud-to-ground lightning frequently occurs within
9064-526: The single-cell storm, yet much weaker than the supercell storm. Hazards with the multicell cluster include moderate-sized hail, flash flooding, and weak tornadoes. A squall line is an elongated line of severe thunderstorms that can form along or ahead of a cold front . In the early 20th century, the term was used as a synonym for cold front . The squall line contains heavy precipitation , hail , frequent lightning , strong straight line winds, and possibly tornadoes and waterspouts . Severe weather in
9167-602: The south"; Pattawilyangga (Patawalonga, Glenelg ) "swamp gum foliage"; and Yertabulti ( Port Adelaide ). Public artworks, beginning in 1995 with the Yerrakartarta installation outside the Intercontinental Hotel on North Terrace, Adelaide , have also incorporated words, phrases and text drawn from the Kaurna language, and the universities and other organisations have also taken on Kaurna names. The Tandanya National Aboriginal Cultural Institute uses
9270-443: The strongest type of thunderstorm. In the United States, a thunderstorm is classed as severe if winds reach at least 93 kilometres per hour (58 mph), hail is 25 millimetres (1 in) in diameter or larger, or if funnel clouds or tornadoes are reported. Although a funnel cloud or tornado indicates a severe thunderstorm, a tornado warning is issued in place of a severe thunderstorm warning . A severe thunderstorm warning
9373-592: The thunderstorm's further growth. The downdraft hitting the ground creates an outflow boundary . This can cause downbursts, a potential hazardous condition for aircraft to fly through, as a substantial change in wind speed and direction occurs, resulting in a decrease of airspeed and the subsequent reduction in lift for the aircraft. The stronger the outflow boundary is, the stronger the resultant vertical wind shear becomes. There are four main types of thunderstorms: single-cell, multi-cell, squall line (also called multi-cell line) and supercell. Which type forms depends on
9476-453: The tropics and subtropics can be responsible for the development of hurricanes . Dry thunderstorms , with no precipitation, can cause the outbreak of wildfires from the heat generated from the cloud-to-ground lightning that accompanies them. Several means are used to study thunderstorms: weather radar , weather stations , and video photography. Past civilizations held various myths concerning thunderstorms and their development as late as
9579-552: The updraft is strong enough, the droplets are held aloft long enough to become so large that they do not melt completely but fall as hail . While updrafts are still present, the falling rain drags the surrounding air with it, creating downdrafts as well. The simultaneous presence of both an updraft and a downdraft marks the mature stage of the storm and produces cumulonimbus clouds. During this stage, considerable internal turbulence can occur, which manifests as strong winds, severe lightning, and even tornadoes . Typically, if there
9682-464: The various monsoon seasons around the globe, and they populate the rainbands of tropical cyclones . In temperate regions, they are most frequent in spring and summer, although they can occur along or ahead of cold fronts at any time of year. They may also occur within a cooler air mass following the passage of a cold front over a relatively warmer body of water. Thunderstorms are rare in polar regions because of cold surface temperatures. Some of
9785-498: The vowel. Historically, Kaurna has had ⟨e⟩ and ⟨o⟩ used varyingly in older versions of its orthography, but these are not reflected in the phonology of the language. The consonant inventory of Kaurna is similar to that of other Pama-Nyungan languages (compare with Adnyamathanha , in the same Thura-Yura grouping). In the orthography, dental consonants are followed by ⟨h⟩ and palatals by ⟨y⟩ , and retroflex consonants are preceded by ⟨r⟩ , with
9888-539: The warm season between spring and fall. More intense systems form over land than over water. One exception is that of lake-effect snow bands, which form due to cold air moving across relatively warm bodies of water, and occurs from fall through spring. Polar lows are a second special class of MCS. They form at high latitudes during the cold season. Once the parent MCS dies, later thunderstorm development can occur in connection with its remnant mesoscale convective vortex (MCV). Mesoscale convective systems are important to
9991-454: The water vapor condenses into liquid, latent heat is released, which warms the air, causing it to become less dense than the surrounding, drier air. The air tends to rise in an updraft through the process of convection (hence the term convective precipitation ). This process creates a low-pressure zone within and beneath the forming thunderstorm. In a typical thunderstorm, approximately 500 million kilograms of water vapor are lifted into
10094-670: Was created from a series of workshops funded by a University of Adelaide grant in 2000, and is hosted by the department of linguistics at the University of Adelaide. KWP-run language classes through both the Kaurna Plains School and the university. KWP has created a uniform dialect of the language, making new words such as mukarntu ( mukamuka brain + karntu lightning), meaning "computer", and other words for things such as modern appliances, transportation, cuisine, and other common features of life that have changed for
10197-461: Was designed by Kaurna artist Katrina Karlapina Power. Entitled Kaurna Warrapiipa, Kaurna Dictionary , the dictionary contains translations both ways (Kaurna and English ). and is published by Wakefield Press . Kaurna has three different vowels with contrastive long and short lengths (a, i, u, a:, i:, u:), and three diphthongs (ai, au, ui). The three main vowels are represented by ⟨a⟩, ⟨i⟩ and ⟨u⟩ respectively, with long vowels indicated by doubling
10300-512: Was initially named Light from 1935 until 1937 after the river. The Light River rises on the northern slopes of the Mount Lofty Range below Waterloo and flows generally south through the localities of Steelton , Marrabel , Hamilton , and Hansborough . Here, about halfway through its course , the river flows westerly past Kapunda , Linwood , Hamley Bridge , Mallala , and Lower Light . The river reaches its mouth and enters
10403-616: Was later named after William Light , likely done by the exploration party of John Hill , William Wood, Charles Willis, and John Oakden , which left Adelaide on 1 March 1838 bound for the Murray River . Hill had accompanied William Light on his expedition of December 1837 when he encountered the Barossa Valley . The first township planned on the River Light was Victoria , located near present Hamilton. At great expense
10506-483: Was not widely used until popularised by South Australian Museum Ethnographer Norman B. Tindale in the 1920s. The term "Kaurna" was first recorded by Missionary Surgeon William Wyatt (1879: 24) for "Encounter Bay Bob's Tribe". At the same time he recorded "Meeyurna" for " Onkaparinga Jack 's Tribe". Kaurna most likely derives from kornar , the word for "people" in the neighbouring Ramindjeri/ Ngarrindjeri language . Mullawirraburka (Onkaparinga Jack, also known to
10609-498: Was self-published in 1839, to be sold in London as well as Adelaide. Others who recorded some knowledge of Kaurna included James Cronk, Walter Bromley , George Augustus Robinson , Hermann Koeler, Louis Piesse, Edward Stephens and James Chittleborough. In the 19th century, there was also a Kaurna-based pidgin used as a contact language. The former range of the language was mapped by Norman Tindale and later Robert Amery , and
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