Tim Raupach
@timraupach.com
Scientia Senior Lecturer at UNSW Sydney Institute for Climate Risk and Response. I study severe storms, especially hail, in a changing climate ⛈️. I also take photos and climb mountains. These views are my own. https://timraupach.com
Reposted by Tim Raupach
My latest for the Conversation - a year on from the release of the NCRA, so what do we have to show for it (TL:DR not much). We have to do better, because we know the future we face.
theconversation.com/its-been-one...
theconversation.com/its-been-one...
It’s been one year since Australia assessed its national climate risk. But have we listened?
Over the past 12 months, the federal government has approved multiple fossil fuel projects and cut climate science funding.
theconversation.com
September 14, 2026 at 9:07 PM
My latest for the Conversation - a year on from the release of the NCRA, so what do we have to show for it (TL:DR not much). We have to do better, because we know the future we face.
theconversation.com/its-been-one...
theconversation.com/its-been-one...
What a reassuring energy company I have. It's September - but hey, although winter is (apparently) here, big bills don't have to. They should make this their slogan.
September 8, 2026 at 11:57 PM
What a reassuring energy company I have. It's September - but hey, although winter is (apparently) here, big bills don't have to. They should make this their slogan.
Reposted by Tim Raupach
On Monday, stage 3 of La Vuelta a España, the cycling race, was cancelled after a hailstorm forced riders to take cover and left hail covering the road. Let’s take a look at what happened! www.youtube.com/watch?v=ddn7... 1/14
Hailstorm cancels Vuelta stage as riders seek safety
YouTube video by SBS Sport
www.youtube.com
August 27, 2026 at 6:37 AM
On Monday, stage 3 of La Vuelta a España, the cycling race, was cancelled after a hailstorm forced riders to take cover and left hail covering the road. Let’s take a look at what happened! www.youtube.com/watch?v=ddn7... 1/14
This visualisation of satellite imagery shows well the scale of the glacier collapse and/or landslide that caused the flash flood in Nepal. www.abc.net.au/news/2026-08...
Satellite images reveal giant scar left after glacier snaps in Nepal
Climate scientists have been warning that the Himalayas are warming faster than the rest of the world, increasing the chances of a disaster of this scale.
www.abc.net.au
August 27, 2026 at 11:43 PM
This visualisation of satellite imagery shows well the scale of the glacier collapse and/or landslide that caused the flash flood in Nepal. www.abc.net.au/news/2026-08...
Devastating scenes from the terrible flood in Nepal. There will be lots of complex causes for this individual event but it does raise the question of whether mountain destabilisation is accelerating. www.nytimes.com/2026/08/27/c...
Climate Change Raises Risk of Disasters Like Nepal Floods (Gift Article)
Glaciers and permafrost in the Himalayas are melting faster as temperatures rise, though scientists are still studying the exact causes of this week’s landslide.
www.nytimes.com
August 27, 2026 at 11:41 PM
Devastating scenes from the terrible flood in Nepal. There will be lots of complex causes for this individual event but it does raise the question of whether mountain destabilisation is accelerating. www.nytimes.com/2026/08/27/c...
On Monday, stage 3 of La Vuelta a España, the cycling race, was cancelled after a hailstorm forced riders to take cover and left hail covering the road. Let’s take a look at what happened! www.youtube.com/watch?v=ddn7... 1/14
Hailstorm cancels Vuelta stage as riders seek safety
YouTube video by SBS Sport
www.youtube.com
August 27, 2026 at 6:37 AM
On Monday, stage 3 of La Vuelta a España, the cycling race, was cancelled after a hailstorm forced riders to take cover and left hail covering the road. Let’s take a look at what happened! www.youtube.com/watch?v=ddn7... 1/14
Terrifying scenes from this awful flood in Nepal and Tibet. www.nytimes.com/interactive/...
August 27, 2026 at 2:16 AM
Terrifying scenes from this awful flood in Nepal and Tibet. www.nytimes.com/interactive/...
This is good. Should you use AI for a task? Bruce Schneier suggests considering whether the task is "work" or "gym". www.theguardian.com/commentisfre...
Should you use AI for a task? Here’s a simple way to decide | Bruce Schneier
Sometimes, what matters isn’t your output but what you put into the process. Think of it like work v the gym
www.theguardian.com
August 11, 2026 at 11:41 AM
This is good. Should you use AI for a task? Bruce Schneier suggests considering whether the task is "work" or "gym". www.theguardian.com/commentisfre...
In this new paper with Sarah Bang and John Allen, we used simulations to examine satellite hail detections in the Australian tropics. Roughly 1/4 of the simulations produced damaging hail at the surface. 1/4 rmets.onlinelibrary.wiley.com/doi/10.1002/...
August 7, 2026 at 2:21 AM
In this new paper with Sarah Bang and John Allen, we used simulations to examine satellite hail detections in the Australian tropics. Roughly 1/4 of the simulations produced damaging hail at the surface. 1/4 rmets.onlinelibrary.wiley.com/doi/10.1002/...
It’s great to be in Fukuoka for #AOGS2026. For this Sydneysider, experiencing WBGT over 34C also really puts heat-stress projections into perspective.
August 4, 2026 at 2:33 AM
It’s great to be in Fukuoka for #AOGS2026. For this Sydneysider, experiencing WBGT over 34C also really puts heat-stress projections into perspective.
Still amused at atmospheric science journal proofs coming back with "reanalyses" - as in the plural of reanalysis - changed to "reanalyzes".
August 3, 2026 at 7:50 AM
Still amused at atmospheric science journal proofs coming back with "reanalyses" - as in the plural of reanalysis - changed to "reanalyzes".
Just spent a wonderful week visiting Uluṟu and Kata Tjuṯa on Anangu land. Peaceful and magical places.
July 19, 2026 at 9:27 AM
Just spent a wonderful week visiting Uluṟu and Kata Tjuṯa on Anangu land. Peaceful and magical places.
Wow, @egu.eu really badly wants candidates for treasurer and ECR union rep. To their credit I normally skim-read these emails but after the 30th identical email I did read it properly.
July 10, 2026 at 7:42 AM
Wow, @egu.eu really badly wants candidates for treasurer and ECR union rep. To their credit I normally skim-read these emails but after the 30th identical email I did read it properly.
How much is climate change already costing us? New work by Timothy Neal and Ben Newell shows that in New South Wales, Australia, that number is on average about $20k in lost income per person per year. Climate change is already a quality-of-life issue. theconversation.com/climate-chan...
Climate change has already made Australians in one state much poorer, and more’s to come
It’s time to recognise climate change for what it is. A new study shows it’s a current and ongoing threat to our standard of living.
theconversation.com
June 10, 2026 at 12:17 AM
How much is climate change already costing us? New work by Timothy Neal and Ben Newell shows that in New South Wales, Australia, that number is on average about $20k in lost income per person per year. Climate change is already a quality-of-life issue. theconversation.com/climate-chan...
Interesting example of a compounding event - March 2025 in Türkiye was so warm that fruit trees flowered early. Then hailstorms and cold temperatures came in April. Fruit crops were ruined and prices doubled for months.
From this paper by @regclimo.bsky.social et al: www.nature.com/articles/s43...
From this paper by @regclimo.bsky.social et al: www.nature.com/articles/s43...
Compound weather and climate events in 2025
Nature Reviews Earth & Environment - Compound weather and climate events in 2025
www.nature.com
June 9, 2026 at 4:23 AM
Interesting example of a compounding event - March 2025 in Türkiye was so warm that fruit trees flowered early. Then hailstorms and cold temperatures came in April. Fruit crops were ruined and prices doubled for months.
From this paper by @regclimo.bsky.social et al: www.nature.com/articles/s43...
From this paper by @regclimo.bsky.social et al: www.nature.com/articles/s43...
This is an excellent recap of compound weather and climate events in 2025. It is also a great explainer of the different types of compounding that can occur, with strong examples.
www.nature.com/articles/s43...
www.nature.com/articles/s43...
June 9, 2026 at 4:03 AM
This is an excellent recap of compound weather and climate events in 2025. It is also a great explainer of the different types of compounding that can occur, with strong examples.
www.nature.com/articles/s43...
www.nature.com/articles/s43...
Reposted by Tim Raupach
New research led by Tim Raupach and Steven Sherwood and published in Nature Climate Change suggests the atmospheric conditions that favour hail formation are shifting towards cooler regions and cooler times of the year.
For more: 21centuryweather.org.au/hail-conditi...
For more: 21centuryweather.org.au/hail-conditi...
Climate change shifting hail risk towards winter crops
Hail conditions on the move as winter crops face rising risk New research led by UNSW suggests that as the climate warms, the conditions that produce hailstorms are drifting towards the poles, leaving...
21centuryweather.org.au
June 4, 2026 at 1:14 AM
New research led by Tim Raupach and Steven Sherwood and published in Nature Climate Change suggests the atmospheric conditions that favour hail formation are shifting towards cooler regions and cooler times of the year.
For more: 21centuryweather.org.au/hail-conditi...
For more: 21centuryweather.org.au/hail-conditi...
Reposted by Tim Raupach
Where will hail risk increase in a warmer world?
A new Nature Climate Change study by CCRC & ICRR researchers finds hail-prone conditions are shifting poleward, with winter hail risk projected to increase in some agricultural regions.
A new Nature Climate Change study by CCRC & ICRR researchers finds hail-prone conditions are shifting poleward, with winter hail risk projected to increase in some agricultural regions.
Shifting hail hazard under global warming and effects on crop hail risk - Nature Climate Change
How hailstorms change with warming is not well understood. Here the authors use global projections with different hail proxies to show that hail-prone conditions shift polewards under warming, also sh...
www.nature.com
June 4, 2026 at 1:21 AM
Where will hail risk increase in a warmer world?
A new Nature Climate Change study by CCRC & ICRR researchers finds hail-prone conditions are shifting poleward, with winter hail risk projected to increase in some agricultural regions.
A new Nature Climate Change study by CCRC & ICRR researchers finds hail-prone conditions are shifting poleward, with winter hail risk projected to increase in some agricultural regions.
In our new paper in Nature Climate Change, we show that hail conditions are projected to shift poleward with climate change, and that summer decreases and winter increases in hail hazard mean that winter crops may face rising risks from hail. www.nature.com/articles/s41...
Shifting hail hazard under global warming and effects on crop hail risk - Nature Climate Change
How hailstorms change with warming is not well understood. Here the authors use global projections with different hail proxies to show that hail-prone conditions shift polewards under warming, also sh...
www.nature.com
June 3, 2026 at 9:18 AM
In our new paper in Nature Climate Change, we show that hail conditions are projected to shift poleward with climate change, and that summer decreases and winter increases in hail hazard mean that winter crops may face rising risks from hail. www.nature.com/articles/s41...
It's a good day when there's a new @boardsofcanada.bsky.social album out.
May 29, 2026 at 5:55 AM
It's a good day when there's a new @boardsofcanada.bsky.social album out.
Important new hail work by Zhang et al., in @nature.com today. Under warming scenarios globally, large hailstones become more frequent and smaller hailstones decline (with regional variation). Another reminder that reducing greenhouse gas emissions is imperative for a safer future. rdcu.be/fk8Fd
Rising global hail damage potential in a warming world
Nature - Hailstone trajectory simulations conducted under historical and future scenarios show a shift towards larger hailstones, resulting in global hailstorm-induced damage potential increasing...
rdcu.be
May 28, 2026 at 1:32 AM
Important new hail work by Zhang et al., in @nature.com today. Under warming scenarios globally, large hailstones become more frequent and smaller hailstones decline (with regional variation). Another reminder that reducing greenhouse gas emissions is imperative for a safer future. rdcu.be/fk8Fd
Our poster session for #EGU26 ITS4.4 is very active with lots of great discussion - interdisciplinary science from flooding rain, hail, to heat stress and financial risk.
May 5, 2026 at 9:58 AM
Our poster session for #EGU26 ITS4.4 is very active with lots of great discussion - interdisciplinary science from flooding rain, hail, to heat stress and financial risk.
