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Michaelnig

23 Jun 2025 - 03:46 pm

There’s a ‘ghost hurricane’ in the forecast. It could help predict a real one
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A scary-looking weather forecast showing a hurricane hitting the Gulf Coast in the second half of June swirled around social media this week—but don’t panic.

It’s the season’s first “ghost hurricane.”

Similar hype plays out every hurricane season, especially at the beginning: A cherry-picked, worst-case-scenario model run goes viral, but more often than not, will never come to fruition.

Unofficially dubbed “ghost storms” or “ghost hurricanes,” these tropical systems regularly appear in weather models — computer simulations that help meteorologists forecast future conditions — but never seem to manifest in real life.

The model responsible this week was the Global Forecast System, also known as the GFS or American model, run by the National Oceanic and Atmospheric Administration. It’s one of many used by forecasters around the world.

All models have known biases or “quirks” where they tend to overpredict or underpredict certain things. The GFS is known to overpredict tropical storms and hurricanes in longer-term forecasts that look more than a week into the future, which leads to these false alarms. The GFS isn’t alone in this — all models struggle to accurately predict tropical activity that far in advance — but it is notorious for doing so.

For example, the GFS could spit out a prediction for a US hurricane landfall about 10 days from now, only to have that chance completely disappear as the forecast date draws closer. This can occur at any time of the year, but is most frequent during hurricane season — June through November.

It’s exactly what’s been happening over the past week as forecasters keep an eye out for the first storm of the 2025 Atlantic hurricane season.
Why so many ghosts?
No weather forecast model is designed in the exact same way as another, and that’s why each can generate different results with similar data.

The reason the GFS has more false alarms when looking more than a week out than similar models – like Europe’s ECMWF, Canada’s CMC or the United Kingdom’s UKM – is because that’s exactly what it’s programmed to do, according to Alicia Bentley, the global verification project lead of NOAA’s Environmental Modeling Center.

The GFS was built with a “weak parameterized cumulus convection scheme,” according to Bentley. In plain language, that means when the GFS thinks there could be thunderstorms developing in an area where tropical systems are possible – over the oceans – it’s more likely to jump to the conclusion that something tropical will develop than to ignore it.

Other models aren’t built to be quite as sensitive to this phenomenon, and so they don’t show a tropical system until they’re more confident the right conditions are in place, which usually happens when the forecast gets closer in time.

The western Caribbean Sea is one of the GFS’ favorite places to predict a ghost storm. That’s because of the Central American gyre: a large, disorganized area of showers and thunderstorms that rotates over the region and its surrounding water.

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Jamesviade

23 Jun 2025 - 02:20 pm

Tree-covered mountains rise behind a pile of trash, children run through the orange haze of a dust storm, and a billboard standing on parched earth indicates where the seashore used to be before desertification took hold. These striking images, exhibited as part of the Right Here, Right Now Global Climate Summit, show the devastating effects of climate change.
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The summit, held at the University of Oxford in the UK and supported by UN Human Rights (OHCHR), aims to reframe climate change as a human rights crisis and spotlight climate solutions. It works with everyone from policymakers to artists to get the message across.

“Photographers document the human rights impacts of climate change, helping to inform the public and hold governments and businesses accountable,” said Volker Turk, UN High Commissioner for the OHCHR, via email. “The Right Here, Right Now Global Climate Summit shows the power of collective action — uniting storytellers, scientists, indigenous leaders, and others to advance climate solutions rooted in human rights.”

Coinciding with World Environment Day on June 5, the exhibition — titled “Photography 4 Humanity: A Lens on Climate Justice” — features the work of 31 photographers from across the globe, all documenting the effects of global warming and environmental pollution on their own communities.

Climate change disproportionately affects vulnerable populations around the world. Despite emitting far fewer greenhouse gases, low-income nations are suffering the most from extreme weather events and have fewer resources to adapt or recover.
Photographs at the exhibition show the effects of desertification, flooding and plastic pollution. A black and white image shows the ruins of a house in West Bengal, India, sloping towards the Ganges River, with the owner sitting alongside. Riverbank erosion is degrading the environment and displacing communities in the area. Photographer Masood Sarwer said in a press release that the photo depicts the “slow violence” of climate change: “These are not sudden disasters, but slow-moving, relentless ones — shaping a new category of environmental refugees.”

Another photo, taken by Aung Chan Thar, shows children fishing for trash in Inle Lake, Myanmar. The lake was once a pristine natural wonder but now faces the growing threat of plastic pollution. “This image of children cleaning the water symbolizes the importance of education and collective action in preserving our environment for a sustainable future,” he said.

Organizers hope that the exhibition will help to humanize the climate crisis. “Our mission is to inspire new perspectives through photography,” said Pauline Benthede, global vice president of artistic direction and exhibitions at Fotografiska, the museum of photography, art and culture that is curating the exhibition at the summit. “It draws attention to the human rights issue at the heart of global warming, which affects both the world’s landscapes and the people that live within them.”

“Photography is the most influential and inclusive art form of our times and has the power to foster understanding and inspire action,” she added.

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