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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.
Savery boarded The Canadian on April 1, 2024, in Vancouver. He treated himself to the prestige class ticket, just as he and his late wife had planned.
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But on the second day of the journey, Savery was surprised when he walked up the stairs into the domed car and saw “the back of someone’s head sitting in one of those reserved seats.”
He raised an eyebrow, but didn’t say anything, instead sitting on the opposite side of the aisle from the mystery passenger: a woman with long curly hair, reading.
Savery recalls thinking: “She’s reading a book, so obviously can read the sign that says this is for prestige passengers only.”
But he kept the slightly ungenerous thought to himself.
“I didn’t say anything,” he says today. “And after a while, she got up and left without a word.”
Later that day, at dinner, Savery was sharing a table with a friendly couple, chatting about what prompted them to book The Canadian. Savery told them about losing his wife, about deciding to fulfill their shared dream, solo.
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Savery boarded The Canadian on April 1, 2024, in Vancouver. He treated himself to the prestige class ticket, just as he and his late wife had planned.
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As soon as he boarded the train, Savery felt a surprising feeling of contentment. He was proud of himself. And excited for what was to come.
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It turned out Savery was the only passenger in prestige class. The whole front row of the domed viewing carriage was reserved just for him.
But on the second day of the journey, Savery was surprised when he walked up the stairs into the domed car and saw “the back of someone’s head sitting in one of those reserved seats.”
He raised an eyebrow, but didn’t say anything, instead sitting on the opposite side of the aisle from the mystery passenger: a woman with long curly hair, reading.
Savery recalls thinking: “She’s reading a book, so obviously can read the sign that says this is for prestige passengers only.”
But he kept the slightly ungenerous thought to himself.
“I didn’t say anything,” he says today. “And after a while, she got up and left without a word.”
Later that day, at dinner, Savery was sharing a table with a friendly couple, chatting about what prompted them to book The Canadian. Savery told them about losing his wife, about deciding to fulfill their shared dream, solo.
“Have you met Giselle?” asked the couple, glancing at one another.
Savery told them, no, he didn’t think he’d met a Giselle yet. The couple described her — tall, long hair.
“I know who that is,” said Savery, realizing the description matched the woman he’d spotted sitting in the prestige class seat.
“She lost her spouse too,” said the couple. “Quite recently.”
Taking in this information, Savery decided he’d make a conscious effort to seek Giselle out on board the train.
Savery boarded The Canadian on April 1, 2024, in Vancouver. He treated himself to the prestige class ticket, just as he and his late wife had planned.
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As soon as he boarded the train, Savery felt a surprising feeling of contentment. He was proud of himself. And excited for what was to come.
crypto-score.com
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It turned out Savery was the only passenger in prestige class. The whole front row of the domed viewing carriage was reserved just for him.
But on the second day of the journey, Savery was surprised when he walked up the stairs into the domed car and saw “the back of someone’s head sitting in one of those reserved seats.”
He raised an eyebrow, but didn’t say anything, instead sitting on the opposite side of the aisle from the mystery passenger: a woman with long curly hair, reading.
Savery recalls thinking: “She’s reading a book, so obviously can read the sign that says this is for prestige passengers only.”
But he kept the slightly ungenerous thought to himself.
“I didn’t say anything,” he says today. “And after a while, she got up and left without a word.”
Later that day, at dinner, Savery was sharing a table with a friendly couple, chatting about what prompted them to book The Canadian. Savery told them about losing his wife, about deciding to fulfill their shared dream, solo.
“Have you met Giselle?” asked the couple, glancing at one another.
Savery told them, no, he didn’t think he’d met a Giselle yet. The couple described her — tall, long hair.
“I know who that is,” said Savery, realizing the description matched the woman he’d spotted sitting in the prestige class seat.
“She lost her spouse too,” said the couple. “Quite recently.”
Taking in this information, Savery decided he’d make a conscious effort to seek Giselle out on board the train.
Les adherents du parti Les Republicains sont appeles a voter, samedi et dimanche, pour choisir leur futur president. Mais entre Bruno Retailleau et Laurent Wauquiez, peu de differences ideologiques existent : a l’image de ce qu’est devenu leur parti depuis 2017, tous deux font campagne a droite toute en misant sur les questions d’immigration et de securite.
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Publie le : 16/05/2025 - 10:45
Modifie le : 16/05/2025 - 10:52
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Par :
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Laurent Wauquiez et Bruno Retailleau, le 19 septembre 2024, arrivant a Matignon.
Laurent Wauquiez et Bruno Retailleau, le 19 septembre 2024, arrivant a Matignon. © Ludovic Marin, AFP
Apres plusieurs semaines de campagne, difficile de savoir qui de Bruno Retailleau ou Laurent Wauquiez remportera la presidence du parti Les Republicains (LR). Les adherents du parti de droite sont invites a les departager, samedi 17 et dimanche 18 mai, pour choisir celui qui incarnera desormais LR, avec en toile de fond l’election presidentielle de 2027.
Mais comment choisir entre deux candidats presentant si peu de differences de ligne ideologique ? Bruno Retailleau et Laurent Wauquiez placent constamment l’immigration et la securite au centre de leurs discours. Si bien que pour exister face a un candidat-ministre devenu favori et omnipresent dans les medias, l’ancien president de la region Auvergne-Rhone-Alpes s’est senti oblige de jouer la surenchere en proposant, le 8 avril dans le JDNews, "que les etrangers dangereux sous OQTF <Obligation>de quitter le territoire francais] soient enfermes dans un centre de retention a Saint-Pierre-et-Miquelon, hors de l’Hexagone".
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