Sometimes air goes up past the condensation level then falls back below the condensation level, then up, then below, again and again. This creates clouds that are stripy, often with lines between the clouds.
Robert Lawry/Author provided
Clouds formed by rising warm air currents are called 'convection clouds'. Because of all the rising air coming up, these clouds can be bumpy on top, sometimes looking like cotton wool or cauliflower.
It’s unlikely NSW will get the sustained rain needed to break the drought.
A new outlook from the Bureau of Meteorology forecasts a dry, warm spring – and not the sustained rain we need.
If you live in a place where the weather moves west to east, then an old proverb could help you predict the weather.
The "red sky" proverb has endured across cultures for centuries, and modern science can explain why this is so.
Brrr! It’s cold in here!
Winter is here, and many farmers are still waiting on their 'autumn break' of heavy rain. Unfortunately, it looks like it will be a dry, warm winter – although the snow season will likely be good.
The complex low weather system currently swirling over south-eastern Australia.
Bureau of Meteorology
Rapidly dropping temperatures, rain and wind are hitting south-eastern Australia, due to a perfect combination of warm seas and low-pressure systems.
Much of Australia is set for a hot April.
Record-breaking April heat is likely to continue for at least another month.
It’s more important to know whether there’ll be any weather than what the weather will be.
Photo by Loren Gu on Unsplash
The Bureau of Meteorology's climate outlook for April to June is 'neutral', but that doesn't mean we're flying blind, weather-wise.
The air doesn’t like to be under pressure just like us. The wind is the result of the air trying to escape from high pressure.
Mami Kempe / The Conversation
Wind is just air moving from one place where there is high pressure to another place where there is low pressure.
Only clouds that are tall with big water drops can make rain, but they also stop most of the light, which makes them look grey.
Marcella Cheng/The Conversation
To answer this question from Fiona, age 6, we need to know some things about clouds and light.
The storm intensified rapidly off the US east coast.
The US was hit by a 'bomb cyclone' last week, bringing icy cold and driving snow. These storms develop very rapidly, forming outside the tropics, typically on continental east coasts in winter.
Australia veered from very wet to very dry in a year of wide-ranging weather extremes.
AAP Image/Mal Fairclough
Last year saw plenty of warm weather around the country, but other notable events included dry months in the southeast, some very cold winter nights, and record-warm dry season days in the north.
Frost affected many crops across WA during September 2016.
WA Department of Primary Industry and Regional Development
We already know that climate change makes heatwaves hotter and longer. But a new series of research papers asks whether there is also a climate fingerprint on frosty spells and bouts of wet weather.
Knowing about hailstones in advance would be preferable.
AAP Image/Dan Peled
New "dual-pol" weather radars promise to spot large hailstones forming inside thunderstorms, giving people a heads-up when it's about to hail.
A NASA satellite image of Hurricane Irma.
Weather forecasters sounded the alarm for the record-breaking Hurricane Irma with several days' notice.
Get ready for heavier rain.
As the planet warms, the amount of moisture in the atmosphere is increasing. This will cause a lot more heavy rainfall, even in areas that are becoming drier.
Climate change is already delivering more extremes of wet and dry to the Pacific region.
EPA/FRANCIS R. MALASIG
New research shows that global warming has already begun to exacerbate extremes of rainfall in the Pacific region – with more to come.
Surf’s up: September storms brought waves, wind and flooding to South Australia.
AAP Image/David Mariuz
2016 was Australia's fourth warmest year on record, capping off the hottest decade.
Wildfires in Tasmania in 2016 were in part the result of an extended dry period beginning in 2015.
October 2015 was the hottest on record for that month, and Tasmania had its driest ever spring.
After the storm … Researchers are working together to predict future outbreaks of thunderstorm asthma.
Researchers from a range of disciplines need to work together if we are to predict and prepare for the next thunderstorm asthma event.
Cape Grim, on the northwest tip of Tasmania, is exposed to some of the cleanest air in the world.
CSIRO/Bureau of Meteorology
Cape Grim's air pollution station has recorded some of the biggest changes to the world's atmosphere over the past 40 years.