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Cyclone Lua
Severe Tropical Cyclone Lua affected a sparsely populated region of Western Australia during mid-March 2012. Originating in a broad low pressure area that formed northwest of Australia by 8 March, the storm was plagued by inhibiting wind shear for the duration of its formative stages. However, it gradually organised, and received the name Lua on 13 March. The cyclone meandered for the first several days of its existence, caught between weak and competing steering currents. After the cyclone drifted northwestward, a building ridge (meteorology), ridge of high pressure to the north drove Lua southeastward toward the Pilbara region. Ultimately intensifying into an upper-end Tropical cyclone scales#Australia, Category 3 severe tropical cyclone with maximum sustained 10-minute winds of , Lua made landfall (meteorology), landfall near the remote community of Pardoo, about east of Port Hedland, Western Australia, Port Hedland. It steadily weakened as it progressed south over interior ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Western Australia
Western Australia (WA) is the westernmost state of Australia. It is bounded by the Indian Ocean to the north and west, the Southern Ocean to the south, the Northern Territory to the north-east, and South Australia to the south-east. Western Australia is Australia's largest state, with a land area of , and is also the List of country subdivisions by area, second-largest subdivision of any country on Earth. Western Australia has a diverse range of climates, including tropical conditions in the Kimberley (Western Australia), Kimberley, deserts in the interior (including the Great Sandy Desert, Little Sandy Desert, Gibson Desert, and Great Victoria Desert) and a Mediterranean climate on the south-west and southern coastal areas. the state has 2.965 million inhabitants—10.9 percent of the national total. Over 90 percent of the state's population live in the South-West Land Division, south-west corner and around 80 percent live in the state capital Perth, leaving the remainder ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RAAF Learmonth
RAAF Base Learmonth, also known as Learmonth Airport , is a joint use Royal Australian Air Force base and civil airport. It is located near the town of Exmouth on the north-west coast of Western Australia. RAAF Base Learmonth is one of the RAAF's three bare bases. It is maintained by the RAAF's 25 Squadron and a small caretaker staff during peacetime. The RAAF also operates the Learmonth Air Weapons Range which covers about and is located south-west of the airbase. History During World War II a little-known landing field was constructed on the western shore of Exmouth Gulf. It was code-named "Potshot" and maintained by No. 76 Operational Base Unit, in support of Operation Potshot. In the 1950s the landing field was further developed as a military base and named RAAF Learmonth in honour of Wing Commander Charles Learmonth DFC and Bar, who, while leading No. 14 Squadron, was killed in a flying accident off Rottnest Island, Western Australia on 6 January 1944. Starting i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yarrie Mine
The Yarrie mine is an iron ore mine located in the Pilbara region of Western Australia, 90 kilometres north-east of Marble Bar. The mine is majority-owned (85 percent)BHP Billiton Annual report 2010 BHP Billiton website, accessed: 6 December 2010 and operated by and is one of seven iron ore mines the company operates in the Pilbara. The company also operates two port facilities at , Nelson Point and Finucane Island, and over 1,000 kilometres of rail in the Pilbara. The Yarrie mine is part of the Mount Goldsworthy joint ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pardoo Station
Pardoo Station is a pastoral lease, formerly a sheep station, and now a cattle station approximately east of Port Hedland and north of Marble Bar, in the Pilbara region of Western Australia. Description The property used to be about in size. It is on the western end of the Great Sandy Desert where it meets the Indian Ocean at the southern end of the Eighty Mile Beach. Mount Goldsworthy, located on the south western side of the lease, is the site of the first iron ore mine in the Pilbara. The Pardoo iron ore mine is located in the region, and shares the station's name. The station was sold in late 2014 by the Rogers family to a Singaporean-based investor, Bruce Cheung, for 13.5 million. Cheung's company, the Pardoo Beef Corporation, appointed Eric Golangco as the general manager. At this time the property was running 5,700 head of cattle on . Centre-pivot irrigation is being used to produce extra hay for stock. The property also has of ocean frontage and has a 145-bay ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eye (cyclone)
The eye is a region of mostly calm weather at the center of a tropical cyclone. The eye of a storm is a roughly circular area, typically in diameter. It is surrounded by the eyewall, a ring of towering thunderstorms where the most severe weather and highest winds of the cyclone occur. The cyclone's lowest barometric pressure occurs in the eye and can be as much as 15 percent lower than the pressure outside the storm. In strong tropical cyclones, the eye is characterized by light winds and clear skies, surrounded on all sides by a towering, symmetric eyewall. In weaker tropical cyclones, the eye is less well defined and can be covered by the central dense overcast, an area of high, thick clouds that show up brightly on satellite imagery. Weaker or disorganized storms may also feature an eyewall that does not completely encircle the eye or have an eye that features heavy rain. In all storms, however, the eye is where the barometer reading is lowest. Structure A typical tropi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monsoon
A monsoon () is traditionally a seasonal reversing wind accompanied by corresponding changes in precipitation but is now used to describe seasonal changes in Atmosphere of Earth, atmospheric circulation and precipitation associated with annual latitudinal oscillation of the Intertropical Convergence Zone (ITCZ) between its limits to the north and south of the equator. Usually, the term monsoon is used to refer to the Wet season, rainy phase of a seasonally changing pattern, although technically there is also a dry phase. The term is also sometimes used to describe locally heavy but short-term rains. The major monsoon systems of the world consist of the Monsoon#Africa (West African and Southeast African), West African, Asian–Australian monsoon, Australian, the North American monsoon, North American, and South American monsoons. The term was first Glossary of the British Raj, used in English in British India and neighboring countries to refer to the big seasonal winds blowin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tropical Cyclone Formation Alert
A Tropical Cyclone Formation Alert (TCFA) is a bulletin released by the U.S. Navy-operated Joint Typhoon Warning Center in Honolulu, Hawaii or the Fleet Weather Center in Norfolk, Virginia, warning of the possibility of a tropical cyclone forming from a tropical disturbance that has been monitored. Such alerts are generally always issued when it is fairly certain that a tropical cyclone will form and are not always released before cyclogenesis, particularly if the cyclone appears suddenly. The TCFA consists of several different checks that are performed by the on-duty meteorologist of the system and its surroundings. If the condition being checked is met, a certain number of points are given to the system. Parts of the TCFA Section 1 The first section of the TCFA contains information on the area of the alert as well as the estimated center of the circulation. The estimated maximum sustained winds are provided as well. Section 2 The second section generally contains more specif ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Joint Typhoon Warning Center
The Joint Typhoon Warning Center (JTWC) is a joint United States Navy – United States Air Force command in Pearl Harbor, Hawaii. The JTWC is responsible for the issuing of tropical cyclone warnings in the North-West Pacific Ocean, South Pacific Ocean, and Indian Ocean for all branches of the U.S. Department of Defense and other U.S. government agencies. Their warnings are intended primarily for the protection of U.S. military ships and aircraft, as well as military installations jointly operated with other countries around the world. Its U.S. Navy components are aligned with the Naval Meteorology and Oceanography Command. History The origins of the Joint Typhoon Warning Center (JTWC) can be traced back to June 1945, when the Fleet Weather Center/Typhoon Tracking Center was established on the island of Guam, after multiple typhoons, including Typhoon Cobra of December 1944 and Typhoon Connie in June 1945, had caused a significant loss of men and ships. At this time th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Universal Coordinated Time
Coordinated Universal Time (UTC) is the primary time standard globally used to regulate clocks and time. It establishes a reference for the current time, forming the basis for civil time and time zones. UTC facilitates international communication, navigation, scientific research, and commerce. UTC has been widely embraced by most countries and is the effective successor to Greenwich Mean Time (GMT) in everyday usage and common applications. In specialised domains such as scientific research, navigation, and timekeeping, other standards such as UT1 and International Atomic Time (TAI) are also used alongside UTC. UTC is based on TAI (International Atomic Time, abbreviated from its French name, ''temps atomique international''), which is a weighted average of hundreds of atomic clocks worldwide. UTC is within about one second of mean solar time at 0° longitude, the currently used prime meridian, and is not adjusted for daylight saving time. The coordination of time and frequ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Karratha, Western Australia
Karratha is a city in the Pilbara region of Western Australia, adjoining the port of Dampier. It is located in the traditional lands and waters of the Ngarluma people, for whom it has been ( or 'country') for tens of thousands of years. Located about east-southeast of the site of three nuclear weapons tests by the British (Operation Hurricane in 1952 and Operation Mosaic in 1956), it was established in 1968 to accommodate the processing and exportation workforce of the Hamersley Iron mining company and, in the 1980s, the petroleum and liquefied natural gas operations of the Woodside-operated North West Shelf Venture located on Murujuga. As of the , Karratha had an urban population of 17,013. The city's name comes from the cattle station of the same name, which derives from a word in a local Aboriginal language meaning "good country" or "soft earth". More recently, Ngarluma people have indicated the name may actually relate to an early interpretation of , stemming from t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rainband
A rainband is a cloud and precipitation structure associated with an area of rainfall which is significantly elongated. Rainbands in tropical cyclones can be either stratiform or convective and are curved in shape. They consist of showers and thunderstorms, and along with the eyewall and the eye, they make up a tropical cyclone. The extent of rainbands around a tropical cyclone can help determine the cyclone's intensity. Rainbands spawned near and ahead of cold fronts can be squall lines which are able to produce tornadoes. Rainbands associated with cold fronts can be warped by mountain barriers perpendicular to the front's orientation due to the formation of a low-level barrier jet. Bands of thunderstorms can form with sea breeze and land breeze boundaries, if enough moisture is present. If sea breeze rainbands become active enough just ahead of a cold front, they can mask the location of the cold front itself. Banding within the comma head precipitation pattern of an extratrop ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Convection (meteorology)
Atmospheric convection is the vertical transport of heat and moisture in the atmosphere. It occurs when warmer, less dense air rises, while cooler, denser air sinks. This process is driven by Air parcel, parcel-environment instability, meaning that a "parcel" of air is warmer and less dense than the surrounding environment at the same altitude. This difference in temperature and density (and sometimes humidity) causes the parcel to rise, a process known as buoyancy. This rising air, along with the compensating sinking air, leads to mixing, which in turn expands the height of the planetary boundary layer (PBL), the lowest part of the atmosphere directly influenced by the Earth's surface. This expansion contributes to increased Wind, winds, cumulus cloud development, and decreased surface Dew point, dew points (the temperature below which condensation occurs). Convection plays a crucial role in weather patterns, influencing cloud formation, wind, and the development of Thunderstor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
