Warmer temperatures cause more water to evaporate into the air and allow that air to hold more water. This sets the stage for heavier downpours. At the same time, global temperatures influence the way heat and moisture move around the planet, meaning drier conditions will occur in some regions of the world.
Warmer oceans increase the amount of water that evaporates into the air. When more moisture-laden air moves over land or converges into a storm system, it can produce more intense precipitation—for example, heavier rain and snow storms.
Heavy rain — when the precipitation rate is > 7.6 mm (0.30 in) per hour, or between 10 mm (0.39 in) and 50 mm (2.0 in) per hour. Violent rain — when the precipitation rate is > 50 mm (2.0 in) per hour.
Severe flooding is caused by atmospheric conditions that lead to heavy rain or the rapid melting of snow and ice. Geography can also make an area more likely to flood. For example, areas near rivers and cities are often at risk for flash floods. A flood is an overflow of water onto land that is normally dry.
In South East Queensland, rainfall is driven by the strength and moisture content of onshore easterly winds, which are often connected to blocking anti- cyclones (high pressure systems) in the Tasman Sea.
Primarily, it's because of troughs, or low-pressure areas in the atmosphere, which typically stretch along a line or axis as the monsoon withdraws. “Very interestingly, this trough axis is hanging around Bengaluru for many days,” says Prof.
cloudburst, a sudden, very heavy rainfall, usually local in nature and of brief duration. Most so-called cloudbursts occur in connection with thunderstorms.
It's mostly caused by heavy rainfall, but can also be caused by king tides, storm surge, snowmelt and dam releases. In inland parts of Queensland, New South Wales and Western Australia, riverine flooding can affect thousands of square kilometres for weeks or even months at a time.
Heavy rainfall can lead to numerous hazards, for example: flooding, including risk to human life, damage to buildings and infrastructure, and loss of crops and livestock. landslides, which can threaten human life, disrupt transport and communications, and cause damage to buildings and infrastructure.
Thunderstorms typically produce heavy rain for a brief period, anywhere from 30 minutes to an hour.
Floods are the most frequent type of natural disaster and occur when an overflow of water submerges land that is usually dry. Floods are often caused by heavy rainfall, rapid snowmelt or a storm surge from a tropical cyclone or tsunami in coastal areas.
It's understood that blood rain occurs when relatively high concentrations of red coloured dust or particles get mixed into rain, giving it a red appearance as it falls. Blood rain is not actually a meteorological or scientific term - instead it's a colloquial phrase which can be found going a fair way back in history.
Torrential Rain is any amount of rain that is considered especially heavy. The proclamation that rains are torrential simply means the amount of rain is abundant, had a fast on-set, or lasts for a long period of time.
Daytime temperatures were up to 2 degrees below average, and night-time temperatures were within 1 degree of average. It was the wettest spring at Observatory Hill since 1995, and 2022 has been the wettest year there since records began in 1858.
Extreme precipitation events have increased in frequency and intensity in the U.S. and across many regions of the world since the 1950s. These events are defined as instances in which the amount of rain or snow experienced in a location substantially exceeds what is normal.
Climate change is causing heavier rains
The study reports “consistent shifts from lower to higher daily precipitation intensities, particularly in the central and eastern United States.” The authors compared rainfall over two periods — 1951 to 1980 and 1991 to 2020 — to see how patterns evolved.
What causes rain? Clouds are made of water droplets. Within a cloud, water droplets condense onto one another, causing the droplets to grow. When these water droplets get too heavy to stay suspended in the cloud, they fall to Earth as rain.
Some places get much more rain than others. This can be because of the amount of water nearby, the direction of the wind, and how close they are to mountains.
In a 2009 essay, Washington state native Jenni Whalen laid out Seattle's six types of rain: drizzle, mist, sprinkles, “normal rain,” downpours and thunderstorms.