Prof Hayley J. Fowler

Scientist and engineer. Expert in climate change impacts, extreme weather events, extreme rainfall, flash flooding, droughts. Climate resilience and adaptation

[Prof Hayley J. Fowler @HayleyJFowler]

@adriangilson5 @MrMatthewTodd @BBCOne @BBC @ZackPolanski @TheGreenParty Fully agree. Not a balanced view of cost and feasibility of net zero. In fact nothing about cost. Just that it's impossible or going to take a long time from Kemi and Michael. It is neither too expensive nor impossible, it just requires the political will.

[Jeff Berardelli @WeatherProf]

I can’t get over tonight’s hi -res GRAF model. It’s wild.
I think it’s overdone towards the end. The GRAF can sometimes spin things up way too fast! But it’s worth noting that it was initially onto something yesterday and the other models have followed suit.
It seems to be trying to transition this tropical, like the Rapid Refresh. I just don’t see how that can happen… It is clearly supported by a cold core upper low… although it - and other hi-res models are certainly trying for sub-tropical. I think that’s possible if it has enough time. Anyway, to spare everyone’s sanity I am stopping this animation Sunday AM as I think that’s where it gets way overdone. But it’s clear that we should we ready for #hurricane force wind gusts in case this thing sling shots into the coast. It may. The biggest impact will still be coastal flooding. No need for worry, just listen to local officials to stay safe and out of flood waters. Better safe, than sorry. #Noreaster

[Jeff Berardelli @WeatherProf]

Update: Today’s catastrophic flood along the Nepal–Tibet border was initially suspected to be a glacial lake outburst flood (GLOF). But new satellite analysis points instead to a massive glacier collapse and ice-rock avalanche that blocked a river before unleashing a devastating surge. A #GLOF contribution is still being investigated.
The disaster highlights the growing hazards of a rapidly changing high-mountain environment due to warming. The graphic below shows the long-term record of reported GLOFs a related, glacier hazard. #Tibet #Nepal #Glacier

[Prof Hayley J. Fowler @HayleyJFowler]

This is the least extreme climate you will live in for the rest of your life, or until we stop burning fossil fuels. @KevinClimate puts bluntly what I said at the National Emergency Briefing. Sobering, as the UK experiences its 5th heatwave in 2026.

[Aaron Bastani @AaronBastani]

This Summer is hot. Very hot.

But on average this is the least extreme weather you’ll experience for the rest of your life.

@KevinClimate is a voice you simply can’t ignore on this stuff.

[Prof Hayley J. Fowler @HayleyJFowler]

@CHinchliffMP Great letter. There is a direct link between El Nino and wet winters in the UK through increased sea surface temperatures in the north Atlantic -these are already very warm this year. We can expect a very wet winter with frequent storms and floods this year in the UK.

[Prof Hayley J. Fowler @HayleyJFowler]

@volcaholic1 Nice analogy!

[Volcaholic 🌋 @volcaholic1]

Let me tell you about the atmospheric sponge effect driven by climate change.

Think of the air like a giant sponge. As the planet warms up, that sponge expands. For every single degree the temperature ticks up, the air can hold about 7% more water.

At first, this giant sponge just sits there, thirstily sucking moisture out of everything. It dries out the soil, sucks the water right out of plants, and turns forests into absolute tinderboxes. That is why we are seeing wildfires ignite and spread faster than ever before.

But here is the catch: a sponge can only hold so much water before it gets completely soaked.

When that overloaded air hits its limit, it doesn't give us a nice, gentle rain over a few weeks. It wrings itself out all at once. We get a massive dump of water in just a matter of hours, leading to brutal flash floods, mudslides, and intense storms.

We are basically losing our normal, predictable seasons. Instead, we are stuck in this loop of bouncing from severe droughts straight into intense floods, and then right back to the heat.

[Johan Rockström @jrockstrom]

And this happens at 1.4°C. Europe warms > 2X faster than planet as a whole, & heat & drought extremes are amplified by interactions with ocean heat, Jet stream slow-down & atmosphere blocking. Future? It will get worse before it potentially gets better.
https://t.co/ozrHbpjJO5

[Volcaholic 🌋 @volcaholic1]

Climate change is coming for us all, and last night it reached the heart of Scotland's capital.

A wildfire broke out in Holyrood Park, Edinburgh, as strong winds and tinder-dry vegetation helped the flames spread.

This is not the Amazon. This is not Australia. This is Scotland.

📹 Richard Goldie

[Nick's Weather Eye @NickJF75]

Look at the size of the hailstone that fell from severe thunderstorms over Ardeche in southern France today 😲

[Prof Hayley J. Fowler @HayleyJFowler]

@Djpuco @meteogreen

[Fiona Harvey @fionaharvey]

UK media failing to draw links between heatwaves and climate crisis https://t.co/ZCToGj7rIl

[Zeke Hausfather @hausfath]

With all the July model runs now in, it is very likely that 2026 will see the largest El Niño event since records began in the late 1800s – and potentially by a truly mind-blowing margin. The median estimate is now 3.6C, roughly 0.8C hotter than the prior record (2.75C).

[Dave Throup @DaveThroup]

Hottest night ever recorded in France.

30°C as a minimum is unthinkable without air con.

[Prof Hayley J. Fowler @HayleyJFowler]

@BrownPatch @MrMatthewTodd @BBCNews @itvnews @SkyNews @LBC @GMB Yes, and we can see that already. Wet and stormy winter coming folks

[Prof Hayley J. Fowler @HayleyJFowler]

@JeanPortley @MrMatthewTodd @BBCNews @itvnews @SkyNews @LBC @GMB Absolutely agree

[Prof Hayley J. Fowler @HayleyJFowler]

@pluerrrpht @MrMatthewTodd @BBCNews @itvnews @SkyNews @LBC @GMB Like it! But I don't really like the idea of increased flooding...

[Met Office @metoffice]

50 years ago today, the 1976 heatwave reached its peak, with a temperature of 35.9°C recorded in Cheltenham.
How might a similar summer look in the future?

To mark the anniversary, watch our 2056 forecast, which explores a plausible future summer shaped by climate change https://t.co/snbPKUEKjr

[Prof Hayley J. Fowler @HayleyJFowler]

@MetWatchUK @meteogreen

[Prof. Stefan Rahmstorf 🌏 🦣 @rahmstorf]

Unsere Kinder und Enkel werden uns bitter verfluchen.
Die #Erderhitzung lässt sich auch durch Nullemissionen nicht zurückdrehen, nur die weitere Erhitzung stoppen.
Denn CO2 bleibt Jahrtausende in der Luft. Kipppunkte kommen näher.
Es wird kein Zurück geben.