Leslie Massey
Australia is a country known for its diverse landscapes, unique wildlife, and long coastline. With its varying climate, Australia experiences a range of weather conditions, including wind. The country is influenced by different wind patterns, such as westerlies in the southern regions and easterlies or trade winds in the northern parts. Australia also encounters tropical cyclones, particularly between December and April, which can bring strong winds and heavy rainfall. The country's vast coastline and outdoor attractions, including surfing and windsurfing spots, showcase the presence of wind. Additionally, the Mallee and upper Wimmera regions in Victoria are known for their warm temperatures, partly due to hot winds blowing from nearby deserts. Australia's weather varies from wet summers in the tropical north to dry winters, with clear skies and milder conditions.
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What You'll Learn
Westerly winds in the south, easterlies in the north
Australia is dominated by westerly winds in the southern parts of the continent and easterly winds in the northern parts. The westerly winds are known as the "prevailing westerlies", which blow from the west to the east in the middle latitudes between 30 and 60 degrees latitude. They originate from the high-pressure areas in the horse latitudes (approximately 30 degrees) and move towards the poles, influencing the path of extratropical cyclones. The westerlies are particularly strong in the Southern Hemisphere due to the vast oceanic expanse and the absence of land in certain areas, which slows the winds down.
The Roaring Forties, between 40 and 50 degrees south latitude, are known for their strong westerly winds. These winds play a crucial role in transporting warm, equatorial waters and winds to the western coasts of continents, particularly in the southern hemisphere. The westerlies are also responsible for the wet climate in coastal Western North America, from Northern Washington to Alaska, during the winter.
In contrast, the northern parts of Australia experience easterly winds, specifically the trade winds. These winds are the prevailing pattern of easterly surface winds found in the tropics near the Earth's equator, equatorward of the subtropical ridge. They blow predominantly from the southeast in the Southern Hemisphere and play a role in guiding the path of tropical cyclones.
The tropical areas of northern Australia experience a wet summer due to the monsoon, with humid north-westerly winds bringing showers and thunderstorms. This is followed by the dry season, which brings clear skies and milder conditions.
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Tropical cyclones
Australia is a country dominated by westerlies in its southern parts and easterlies (trade winds) in the north. The southern parts of Australia get the usual westerly winds and rain-bearing cold fronts that come when high-pressure systems move towards northern Australia during the winter. The northwest cloudbands provide up to 80% of the annual rainfall for northwestern Australia and up to 40% for southwestern Australia.
The tropical areas of northern Australia have a wet summer due to the monsoon. During "the wet", typically from October to April, humid north-westerly winds bring showers and thunderstorms. Occasionally, tropical cyclones can bring heavy rainfall to tropical coastal regions, which can also reach inland.
Cyclones can bring destructive winds, heavy rain, and flooding, creating storm surges along the coast and causing inundation in low-lying areas. The worst cyclones in Australia have caused billions of dollars of damage and many deaths. The strongest cyclone in Australia to date was 2006's Cyclone Monica, with gusts topping 350 km/h (220 mph).
While the number of tropical cyclone days is projected to decrease in the Australian region, a greater proportion is expected to be of higher intensity. Heatwaves are also likely to occur more often and with greater intensity in future decades.
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Humid north-westerlies bring thunderstorms
Australia is a country of diverse weather patterns, from its scorching hot deserts to its snow-capped mountains. With its large landmass and lengthy coastline, Australia is subject to a range of wind patterns and weather systems. The southern parts of the continent are dominated by westerly winds, while the north experiences easterly trade winds.
The tropical areas of northern Australia experience a wet summer due to the monsoon season, typically from October to April. During this time, humid north-westerly winds bring showers and thunderstorms. These winds can occasionally develop into tropical cyclones, bringing destructive winds, heavy rainfall, and flooding to the coastal regions, with impacts reaching inland. The regions between Broome and Exmouth are the most prone to cyclones. These weather events can cause billions of dollars of damage and, sadly, many deaths.
Thunderstorms are relatively common across Australia, with an annual average of 15 to 20 thunderstorms. The country also experiences around 60 tornadoes per year. The summer daytime temperatures in the tropical north range from 32 to 40 °C (90 to 104 °F), with winter temperatures between 18 and 23 °C (64 to 73 °F).
The southern parts of Australia experience rain-bearing cold fronts when high-pressure systems move towards the north during the winter. Cold snaps can bring frost inland, although temperatures near the coast remain mild year-round. The Australian northwest cloudbands provide a significant proportion of the annual rainfall for northwestern and southwestern Australia.
The diverse weather conditions in Australia provide a range of outdoor activities for locals and tourists alike. The country boasts beautiful beaches for swimming, sunbathing, and surfing, as well as hiking trails through its varied landscapes, including the Australian Alps and the rainforests of the Daintree.
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Snowfall in the southeast
Australia is dominated by westerlies in the southern parts of the continent and easterlies (trade winds) in the north. The southern parts of Australia get the usual westerly winds and rain-bearing cold fronts when high-pressure systems move towards northern Australia during the winter.
The Snowy Mountains, the Australian Alps, and various parts of Tasmania offer the most reliable snowfall, making them popular destinations for winter sports enthusiasts. The Victorian Alps in the eastern and central regions constitute the coldest climate in Victoria, with average maximum temperatures of less than 9 °C (48 °F) in winter and below 0 °C (32 °F) in the highest parts of the ranges.
While snowfall is rare in Adelaide and much of South Australia, it does occasionally occur in elevated areas like the Adelaide Hills and the Mid-North region during the winter months. Mount Lofty may experience a light dusting of snow, but it is rare and usually melts quickly due to the region's temperate climate and mild winters.
The Australian snow season typically runs from June to September, with the highest 24-hour snowfall on record occurring in Crohamhurst on February 3, 1893, with 907 millimeters (35.7 inches).
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Outdoor activities affected by wind
Australia is a country with diverse natural landscapes, an array of wildlife, and a long coastline. It offers a plethora of outdoor activities for locals and tourists alike. However, the wind patterns and weather conditions in Australia can sometimes affect these outdoor activities.
The southern parts of Australia typically experience westerly winds and rain-bearing cold fronts during the winter months. These winds can bring cooler temperatures and higher wind speeds, which may not be ideal for certain outdoor pursuits. For example, high wind speeds can create unsafe conditions for beach-going activities such as swimming and sunbathing. Strong winds can also make hiking more challenging, particularly in mountainous or exposed areas, where the wind chill factor can make it feel much colder than it actually is.
During the summer, the tropical areas of northern Australia experience a wet season due to humid north-westerly winds. These winds bring showers and thunderstorms, which can impact outdoor plans. Water-based activities, such as kayaking, paddle boarding, and windsurfing, may be affected by strong winds and choppy waters. Additionally, hiking trails can become muddy and slippery after heavy rainfall, making the terrain more difficult to navigate.
Australia is also prone to tropical cyclones, which primarily occur between December and April. These cyclones can bring destructive winds, heavy rainfall, and flooding, causing disruptions to outdoor activities. The regions between Broome and Exmouth are particularly vulnerable to cyclones, and these extreme weather events have historically caused significant damage and loss of life.
On the other hand, wind can be a beneficial factor for certain outdoor activities. For instance, windsurfing and sailing enthusiasts may welcome stronger winds, as they provide the necessary conditions for their sports. Additionally, a gentle breeze during hot summer days can make outdoor activities more pleasant by providing a cooling effect.
Overall, while the wind and weather conditions in Australia can sometimes pose challenges for outdoor activities, they also offer opportunities for adaptation and enjoyment of diverse pursuits in this vast and naturally rich country.
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Frequently asked questions
Australia is a large country with diverse weather patterns, so it experiences a range of wind speeds. The southern parts of the continent are dominated by westerlies, while the northern parts experience easterly trade winds. The southern parts of Australia get the usual westerly winds and rain-bearing cold fronts during winter. The country is also affected by tropical cyclones, which can bring destructive winds and occur primarily between December and April.
The Mallee and upper Wimmera in Victoria are known for their warm temperatures and hot winds blowing in from nearby deserts. Victoria's highest maximum temperature of 48.8°C (119.8°F) was recorded in Hopetoun during a heatwave in 2009.
Australia experiences about 60 tornadoes per year, with the earliest recorded tornado occurring in 1795. The country is also susceptible to tropical cyclones, which can bring destructive winds, heavy rain, and flooding. The strongest Australian cyclone on record was Cyclone Monica in 2006, with gusts exceeding 350 km/h (220 mph).
Australia's diverse landscapes and long coastline offer a range of outdoor activities, including beach-going, hiking, and water sports. The wind conditions can impact activities like surfing, windsurfing, and sailing. The wind, along with other weather factors, also contributes to extreme conditions such as bushfires, floods, and cyclones, which can pose hazards for outdoor enthusiasts.
