105-650: Northam is a town in the Wheatbelt region of Western Australia , situated at the confluence of the Avon and Mortlock Rivers . It is the largest town and regional centre in the Avon Valley region of the Central Wheatbelt. It is located approximately 97 kilometres (60 miles) north east of Perth , the capital city of Western Australia . At the time of the 2021 census , Northam had a population of 6,679. The area around Northam
210-572: 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
315-651: 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
420-481: 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
525-471: A diverse ecosystem, reduced when clearing began in the 1890s with the removal of plant species such as eucalypt woodlands and mallee , is now home to around 11% of Australia's critically endangered plants. A number of nationally threatened birds reside in the Wheatbelt, including the endangered Carnaby's black cockatoo and the vulnerable malleefowl . The Wheatbelt encompasses a range of ecosystems and, as
630-404: 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 ,
735-500: 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
840-505: 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
945-458: A range of other agricultural and pastoral products. With a range of climate and economic changes in the region, considerable effort is made by government at all levels to cope with the decline of some communities, and create opportunities for ventures that keep population in the region. Cultural change with population changes in many localities has been identified by local museums and historical societies, including online documentation. Also
1050-613: A result, there are a range of industries operating in the region. In the Interim Biogeographic Regionalisation for Australia there are a number of subdivisions such as the Avon Wheatbelt (AVW), and a further breakdown of Avon Wheatbelt P1 (AW1) and Avon Wheatbelt P2 (AW2), Jarrah Forest , Geraldton Sandplains and Mallee regions. Near the coast, the region receives relatively high rainfall and mild temperatures, and its 150 kilometres (93 mi) of coastline
1155-445: 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
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#17328800557061260-562: 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
1365-421: 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
1470-1072: A vernacular term for the area converted to agriculture during colonisation. It partially surrounds the Perth metropolitan area , extending north from Perth to the Mid West region, and east to the Goldfields–Esperance region. It is bordered to the south by the South West and Great Southern regions, and to the west by the Indian Ocean , the Perth metropolitan area, and the Peel region. Altogether, it has an area of 154,862 square kilometres (59,793 sq mi) (including islands). The region has 42 local government authorities, with an estimated population of 75,000 residents. The Wheatbelt accounts for approximately three per cent of Western Australia's population. The area, once
1575-683: 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
1680-461: 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
1785-596: 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
1890-597: Is a major railway junction, and serves as the commercial centre for much of the western Wheatbelt . The dual gauge Eastern Railway terminates here and becomes the standard gauge Eastern Goldfields Railway . Narrow gauge radiates both south of the town to York and beyond ( Great Southern Railway ), and north to Goomalling , another rural railway junction. Northam railway station is served by Transwa 's AvonLink , MerredinLink and Prospector rural train services, and Great Southern Rail's Indian Pacific to Sydney . The original station on Fitzgerald Street
1995-436: Is a significant tourist area. In contrast, the eastern fringe is very arid, and is mainly used for pastoral farming of sheep. Mining of gold , nickel and iron ore also occurs. The remainder of the region is highly suited to agriculture , and is the source of nearly two thirds of the state's wheat production, half of its wool production, and the majority of its lamb and mutton , oranges , honey , cut flowers and
2100-435: 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
2205-647: Is held annually on a Friday and Saturday in mid-September. It is an agricultural show similar to others held in the area, such as the York Show and the Toodyay Show. The Kep Ultra running race is held each year on the Western Australia Day long weekend in early June. The race starts in Northam and includes 100 km and 75 km events finishing at Mundaring Weir . During World War I , Wilberforce, an area on
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#17328800557062310-630: Is home to several iconic Western Australian events and activities. The Avon Descent is an annual, two-day white water river race that begins in Northam, and travels 124 km down the Avon River, into the Swan River before finishing in Bayswater . It occurs each year in August, and allows both power craft and peddle craft. The Northam Motorsport Festival occurs annually between the months of March and April and
2415-474: 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)
2520-556: 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
2625-525: 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
2730-421: Is located on Duke Street. It was the first primary school of the area and has approximately over 300 students. West Northam Primary School is located on Habgood Street and has approximately 140 students. Avon Vale Primary School opened in 1954. It is located on Hutt Street and has approximately 140 students. Northam Senior High School is the public high school for the area. It is one of the oldest high schools in
2835-422: 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
2940-468: 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
3045-741: 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
3150-412: 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
3255-411: 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
Northam, Western Australia - Misplaced Pages Continue
3360-569: Is the main regional centre for the Central Wheatbelt region, and as such many local and state government departments choose to operate out of the town. Services Australia operates a Centrelink office in the town. Northam has a number of tourist attractions, including hot air ballooning , wineries, cafes and restaurants, museums, hotels and motels. Northam is connected to Perth via coach services N3 and N5, and rail services Prospector and MerredinLink provided by Transwa . Northam
3465-586: 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
3570-650: Is the spiritual successor to the historical Northam Flying 50s event. It is a free event which incorporates three activities, the Mount Ommanney Hillclimb, the SCBC Motokhana and the iconic Northam Flying 50s, an event in which the main streets of Northam are used as a circuit in which classic cars may complete time trials and race. There also is a classic car show, and several other small promotions and specials put on by community members. The show attracts around 5,000 spectators annually. The Northam Farmer's Show
3675-437: 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
3780-571: The Avon River . It has been periodically flooded, and man-made banks protect the town from inundation. The Avon is a name commonly used by organisations, newspapers and sporting groups. The river is spanned by a pedestrian suspension bridge ; at 117 metres (384 ft), it is the longest such bridge in Australia. Burlong Pool a pool just south of the town was known as the Burlong swimming pool, and in
3885-464: The Avon Yard . Northam has three public primary schools, a public high school, and a TAFE campus. It also has a private Catholic school, St Josephs which conducts classes from Kindergarten to Year 12, across two campuses. The original Northam Primary School was established in 1890, making it one of the states oldest primary schools. The current school opened in 1978 replacing the original structure, it
3990-653: The CBH grain receival points (grain silos ), which are primarily located in the Wheatbelt region. Six main highways radiating out from Perth serve the Wheatbelt: Brand Highway (north-west to Geraldton ), Great Northern Highway (north-east to Wyndham ), Great Eastern Highway (east to Kalgoorlie ), Great Southern Highway (east to York , then south to Cranbrook ), Brookton Highway (east-south-east to Brookton ), and Albany Highway (south-east to Albany ). A network of main roads connects towns within
4095-661: 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
4200-490: 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
4305-438: 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
Northam, Western Australia - Misplaced Pages Continue
4410-628: 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
4515-517: 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
4620-526: The Town of Northam handling the affairs of the town, and the Shire of Northam which also manages other towns, such as Bakers Hill and Wundowie . After 53 years of debates and failed attempts, the two councils finally merged as of the 1 July 2007 to form a conglomerate council, simply known as the Shire of Northam . The public sector is a large employer for residents of Northam and surrounding areas. The town of Northam
4725-537: 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
4830-437: 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
4935-418: 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
5040-504: 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
5145-456: The 1890s the location of the source of water for the Goldfields water trains. Northam has a hot-summer mediterranean climate ( Köppen : Csa ) with hot, dry summers and mild, rainy winters. A severe thunderstorm lashed the town and surrounding areas on 27 January 2011 resulting in roofs being ripped off, trees being uprooted and power lines being brought down. About 50 houses were damaged in
5250-475: 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
5355-585: The 1940s and 1950s in Northam there were extensive camps for displaced persons and immigrants from continental Europe . The Northam Migrant Accommodation Centre closed in September 1951. It had been the first place of residence in Western Australia for approximately 15,000 immigrants from the Baltic states , Hungary , Poland , Czechoslovakia , Italy , Yugoslavia , Ukraine , Belarus and Bulgaria . During
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#17328800557065460-481: 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
5565-510: The Great Southern, Goldfields-Esperance and Mid West regions that are dominantly grain growing areas. There are numerous subdivisions of the Wheatbelt, and in most cases the separation is by local government areas. The Wheatbelt Development Commission (WDC) breaks the region up into five sub-regions with four offices: Most of the Wheatbelt is included in the larger Australia's Golden Outback. Due to their proximity to Perth, however,
5670-524: The Northam area. On 18 October 2010 the Yongah Hill (YHIDC) centre was announced as being established at the former Northam Army Training Camp. It was not opened until early 2012, however, and, after it was downsized from the original 1500 expected occupancy, talk of expansion has been happening. It is run by Serco for the Department of Home Affairs . Australian Border Force officers are also present at
5775-456: The Spencers Brook to York Road was the area set up for the breeding and selection of horses to be transported to overseas theatres of war involving Australian horseman in particular the iconic 10th Light Horse Regiment . Wheatbelt, Western Australia The Wheatbelt is one of nine regions of Western Australia defined as administrative areas for the state's regional development, and
5880-496: The Wheatbelt to each other, the highways, and neighbouring regions, with local roads providing additional links and access to smaller townsites. Roads are often named after the towns they connect. The following list is the shires listed in the Wheatbelt as designated by the Wheatbelt Development Commission. Some shires in adjoining regions are traditionally considered part of the Wheatbelt – there are shires in
5985-589: 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
6090-758: 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
6195-402: 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
6300-501: 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
6405-407: The centre. In September 2018 a riot broke out at the centre and some buildings were set on fire, after a detainee was reportedly found in his cell injured after a suicide attempt. The detainee, who was a refugee, later died. Also in September 2018, a guard was alleged to have sexually assaulted a detainee. The town and hinterland of Northam are located in the Avon Valley - so named after the river
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#17328800557066510-431: 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
6615-497: 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
6720-637: 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
6825-437: The event for over a week with Northam competitors showing their dominance in the sport in the state. Three local riders who participated in this event (Dale Reynolds - then ranked 3WA for 18 Men's, Chris Marris - then ranked 1WA for 18 Men's, and Kyle Martin - then ranked 4WA for 18 Men's) have subsequently completed cross country rides from Adelaide to Perth demonstrating the interest in cycling in Northam. Steve Fossett became
6930-637: The first person to fly around the world alone, non-stop, in a hot air balloon when he launched from Northam on 19 June 2002, and returned to Australia on 3 July, landing in Queensland . In July 2016 Russian adventurer and balloon pilot Fedor Konyukhov took off from Northam airfield to attempt a solo nonstop round the world balloon flight. He completed his circumnavigation, covering 33,521 kilometres (20,829 mi), in 11 days, 4 hours and 20 minutes, beating Fossett's record by 52 hours. Between 1952 and 1956 several motor racing events were held using streets within
7035-656: The following shires are instead promoted as part of the Destination Perth region. The tourist precincts are included: Finally, the northwestern Shire of Dandaragan is promoted as part of Australia's Coral Coast region due to the presence of the larger seaside towns of Cervantes and Jurien Bay , which developed independently of wheat-growing. The Wheatbelt is separated into other designations at various times as well: 32°S 118°E / 32°S 118°E / -32; 118 Thunderstorm A thunderstorm , also known as an electrical storm or
7140-429: 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
7245-739: 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
7350-427: 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
7455-579: 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
7560-469: 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
7665-449: 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
7770-410: 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
7875-402: 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
7980-532: 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
8085-419: The literary tradition of writers including the wheatbelt in their writing included: Lesser known writers also have the wheatbelt environment in their writing such as Lilian Wooster Greaves . The Wheatbelt once had an extensive railway system , which transported bulk wheat grain. It has been reduced in part, while the main lines are being supported. Grain is transported on those lines to ports for export from
8190-609: 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
8295-449: 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
8400-485: The many European immigrants living at the Holden Camp a league was formed comprising nine teams from Northam and one from Wundowie. Many of the teams were based on ethnicity such as: Italian; Dutch; Polish; Hungarian; Romanian; Yugoslav; Austrian; German and Bulgarian. In recent years, Northam United FC was a men's team whilst Northam Springfield FC is a children's football club in its tenth season (2021). Springfield play in
8505-653: 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
8610-474: The nearby towns of York and Beverley , but the arrival of the railway made Northam the major departure point for prospectors and miners heading east towards the goldfields . The town has had three newspapers over the years, all now defunct, namely The Northam Advertiser , Northam Courier , and the Northam News . A number of older buildings have heritage significance and still serve the community. During
8715-530: 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
8820-526: 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
8925-580: The peak immigration period, Northam had the largest immigrant receiving facilities within the State and the third largest in Australia. By 1950, the camp housed 4,000 people and two new blocks of huts were built to accommodate them all. By May 1954, 23,000 migrants had passed through the Northam Camp once the Accommodation Centre had closed. A significant number of these post-war arrivals eventually settled in
9030-498: 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
9135-426: 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
9240-489: 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
9345-503: 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
9450-526: 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
9555-555: The state, opening in 1921. The main building is heritage listed, though the campus has had renovations and further additions added to it in 1986, 1996 and 2015 It has approximately 715 students. In Semester 2, 2020 the school became an Independent Public School. It has several specialized programs to meet the diverse needs of its students, such as the Big Picture Program, Clontarf Foundation , Wirrpanda Foundation, Deadly Sista Girlz and others. The school not only intakes students from
9660-443: 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
9765-592: 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
9870-473: The town as a result of the storm but no injuries were reported. A flash flood occurred in the town and surrounding areas on 2 March 2021, with 40 millimetres of rainfall occurring in just half an hour. This resulted in many houses being damaged, as well as the Jubilee oval flooding, leaving silt all over the busy road of Peel Terrace. Originally, the town and surrounding area was split into two municipalities,
9975-645: The town of Northam, but also Year 10-12 students from the surrounding District High Schools, including the surrounding towns of Toodyay , York , Beverley , Goomalling and others. It also has a college for students that board that are from remote communities, Northam Residential College. Saint Josephs is a private Catholic school, with two campuses in Northam. It has approximately 600 students and teaches from Kindergarten to Year 12. The primary school campus, located on Lance Street, teaches students Kindergarten to Year 6. The high school campus, located on Wellington Street East, teaches students Year 7 to Year 12. This campus
10080-501: The town. The first circuit used was on the south side of the Avon River, but this was considered too dangerous, so a new circuit was built in 1956 on the north side of the river. Thoroughbred horse racing is held at Northam Racecourse by the Northam Race Club. The track held its first race in 1863 and has about 22 race meetings during the year. The town is also home to harness racing and greyhound racing . The town of Northam
10185-453: 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
10290-552: 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
10395-464: 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
10500-539: 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
10605-454: 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
10710-669: The winter against their rivals Toodyay Junior Soccer Club. Northam has some very committed sporting teams. Australian rules football is an obsession with many of the people of Western Australia. Northam has two teams that play in the Avon Football Association competition, Federals and Railways. Field and indoor hockey , cricket , and netball also attract significant numbers of players and spectators. Individual sports such as tennis and cycling including BMX are also popular. The BMX State Championships were held in Northam in 2003 with 3,000 competitors and spectators attending
10815-463: Was first explored in 1830 by a party of colonists led by Ensign Robert Dale , and subsequently founded in 1833. It was named by Governor Stirling , probably after a village of the same name in Devon , England . Almost immediately it became a point of departure for explorers and settlers who were interested in the lands which lay to the east. This initial importance declined with the growing importance of
10920-842: Was opened in 1889 by the Sisters of Saint Joseph of the Apparition, while the Marist Brothers opened the Saint Pauls school in 1948 and 1971 before merging the schools together. Northam has a TAFE campus, previously known as the C. Y. O'Connor Institute . It has since been merged with other regional TAFEs and trades under Central Regional TAFE. Northam is also home to the Muresk Institute , one of Western Australia's leading tertiary educators for agriculture. Association Football (Soccer) has been played in Northam since just after World War Two. Due to
11025-507: Was opened in 1900 and closed in 1966 when the new Eastern Railway route became operational. The layout of the pre-1966 narrow gauge railway also had a busy junction at East Northam; this was removed on the completion of the new standard gauge railway. The Western Australian Government Railways originally created it as the Avon Marshalling Yard , and more recent operators in the yards such as Australian Railroad Group have named it
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