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.
Places such as Berri were affected by Millennium Drought, caused by low cool-season rain. New materials and techniques are now being used to observe drought causes and water patterns in Australia’s history to help the future.
Australia has always suffered heat and flood, but a detailed seasonal rainfall reconstruction of the last 800 years shows the extremes are intensifying.
Much of Australia is set for a hot April.
Record-breaking April heat is likely to continue for at least another month.
Very wet weather is likely to persuade many regular cyclists and walkers to travel instead by car if they can. This is Bondi Junction after a storm hit Sydney.
The relationship between weather and our travel choices is complicated. We can't change the weather, but, with many other factors in play, good policy and design can reduce its impacts.
Snow on the ground after a winter storm.
NASA Goddard MODIS Rapid Response
Why can't meteorologists call the weather correctly every time? Blame the battle of the weather models.
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.
Asperitas cloud over Newtonia, Missouri, US.
© Elaine Patrick, Cloud Appreciation Society Member 31940.
Clouds can reveal a great deal about the world we live in. Here's what happens when scientists find a whole new type.
Cumulonimbus: heavy rain and thunder on the horizon.
The skies can tell us when there might be trouble ahead.
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.
Extreme cold weather in Atlanta, Ga., on Jan. 3, 2018.
AP Photo/David Goldman
Many parts of the US have experienced extreme heat or extreme cold in the past year. Recent research projects that climate change will increase deaths from both types of weather, especially cold spells.
Seriously cold: The ‘bomb cyclone’ freezes a fountain in New York City.
AP Photo/Mark Lennihan
An atmospheric scientist who studies the Arctic explains why – because of global warming – the U.S. may be in for longer cold spells in the 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.
Trees and power lines in Puerto Rico, damaged by Hurricane Maria in September.
2017 brought wild, wacky and even deadly weather. Australia was hit by heatwaves and torrential rains, plus some surprisingly cool spells. Hurricanes hit America, and a killer monsoon lashed Asia.
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.
C. P. Ewing
The science of red skies can also help us understand how stars form.
A tornado in the town of Sonnac, France, in September, 2015.
European tornadoes may not come along as often as their US counterparts but they are a real threat and need to be taken seriously.
A NASA satellite image of Hurricane Irma.
Weather forecasters sounded the alarm for the record-breaking Hurricane Irma with several days' notice.
Tampa residents take a rare chance for a stroll on the seabed.
Pictures of ocean bays emptied of water as Hurricane Irma moved through the Caribbean and Florida show that storm surges can move away from the coast, as well as onto it.
This winter had some extreme low and high temperatures.
In 2017 Australia's winter had the highest average daytime temperatures on record. This extreme is 60 times more likely to occur under the influence of greenhouse gas emissions.
Rainbows get their round shape from a process called reflection.
Georgina, age 5, wants to know why rainbows are round.