What is a bomb cyclone? The extreme winter storm hitting the US
Though it might not sound like it, a “bomb cyclone” is a legitimate scientific term, so named because the rapid formation of the storm is like a bomb going off.
Millions of Americans have been warned to brace for a bomb cyclone with blizzard conditions, wind chills and temperatures plunging as low as -45.6C (-50.1F) – cold enough to get frostbite in less than five minutes.
A bomb cyclone or “weather bomb” is a term used to describe a rapidly deepening area of low pressure.
“More correctly, it should be called explosive cyclogenesis, which is when the central pressure of a low pressure system falls dramatically – by 24 millibars in 24 hours,” Sky News weather presenter Kirsty McCabe said.
“These intense storms bring heavy precipitation and very strong winds. In the US right now, very cold Arctic air is being pulled in, with the freezing weather causing further complications.”
How does a bomb cyclone form?
The sudden change in pressure is due to interactions with a powerful jet stream, McCabe said.
“This is the fast-moving ribbon of air high in the atmosphere that steers our surface low pressure systems around.
“The contrast between cold, Arctic air in the north and warm, tropical air in the south has strengthened the jet stream, which in turn deepened the area of low pressure.”
Overnight lows from Friday night into Saturday morning (temperatures in Celsius)
Why is it called a bomb cyclone?
Meteorologists have likened the sudden drop in pressure to a bomb going off, using words such as “explosive cyclogenesis” and “bombogenesis” to describe the storm’s formation process.
The term specifically refers to the speed at which a storm forms, Daniel Swain, a climate scientist at the University of California, said.
“It doesn’t necessarily refer to the absolute strength of the storm system,” he said.
Does the UK get bomb cyclones?
The UK has experienced weather bombs, most famously the Great Storm of 1987.
Wrapping up as snow begins to fall in St Louis, Missouri. Pic: AP
How does a bomb cyclone differ from a hurricane?
“All bomb cyclones are not hurricanes,” Mr Swain said. “But sometimes, they can take on characteristics that make them look an awful lot like hurricanes, with very strong winds, heavy precipitation and well-defined eye-like features in the middle.”
Hurricanes tend to form in tropical areas and are powered by warm seas. For this reason, they’re most common in the US in summer or early autumn, when seawater is warmest.
In contrast, bomb cyclones don’t need balmy ocean waters to form.
They can appear over land as well as the sea and are most common between late autumn and early spring, when warm tropical air bumps up against frigid Arctic air.
“They have to occur at a time of year when there is some possibility of both warm and cool air at the same time,” Mr Swain said. It’s the difference in temperature that fuels the drop in pressure.
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Are bomb cyclones dangerous?
It depends. Sometimes, bomb cyclones behave like conventional winter storms.
But sometimes they produce heavy flooding, blizzard conditions and wind speeds comparable to a Category 1 hurricane.
“Fundamentally, the impacts of a bomb cyclone are not necessarily different from other strong storm systems, except that the fast strengthening is usually a signature of a very powerful storm system,” Mr Swain said.
Much of the danger lies in the fact that bomb cyclones can take people by surprise, he added.
Donald Trump has said he is considering “taking away” the US citizenship of actress and comedian Rosie O’Donnell, despite a Supreme Court ruling that expressly prohibits a government from doing so.
In a post on Truth Social on Saturday, the US president said: “Because of the fact that Rosie O’Donnell is not in the best interests of our Great Country, I am giving serious consideration to taking away her Citizenship.”
He also labelled O’Donnell, who has moved to Ireland, as a “threat to humanity” and said she should “remain in the wonderful country of Ireland, if they want her”.
O’Donnell responded on Instagram by posting a photograph of Mr Trump with Jeffrey Epstein.
“You are everything that is wrong with America and I’m everything you hate about what’s still right with it,” she wrote in the caption.
“I’m not yours to silence. I never was.”
Rosie O’Donnell moved to Ireland after Donald Trump secured a second term. Pic: AP
O’Donnell moved to Ireland with her 12-year-old son in January after Mr Trump had secured a second term.
She has said she’s in the process of obtaining Irish citizenship based on family lineage and that she would only return to the US “when it is safe for all citizens to have equal rights there in America”.
O’Donnell and the US president have criticised each other publicly for years, in an often-bitter back-and-forth that predates Mr Trump’s move into politics.
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This is just the latest threat by the president to revoke the citizenship of someone he has disagreed with, most recently his former ally Elon Musk.
But the two situations are different as while Musk was born in South Africa, O’Donnell was born in the US and has a constitutional right to American citizenship.
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Amanda Frost, a law professor at the University of Virginia School of Law, said the Supreme Court ruled in a 1967 case that the fourteenth amendment of the constitution prevents the government from taking away citizenship.
“The president has no authority to take away the citizenship of a native-born US citizen,” he added.
“In short, we are nation founded on the principle that the people choose the government; the government cannot choose the people.”
A farmer who fell from a greenhouse roof during an anti-immigrant raid at a licensed cannabis facility in California this week has died of his injuries.
Jaime Alanis, 57, is the first person to die as a result of Donald Trump’s Immigration Compliance and Enforcement (ICE) raids.
His niece, Yesenia Duran, posted on the fundraising site GoFundMe to say her uncle was his family’s only provider and he had been sending his earnings back to his wife and daughter in Mexico.
The United Food Workers said Mr Alanis had worked on the farm for 10 years.
“These violent and cruel federal actions terrorise American communities, disrupt the American food supply chain, threaten lives and separate families,” the union said in a recent statement on X.
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The Department of Homeland Security (DHS) said it executed criminal search warrants at Glass House Farms facilities on Thursday.
Mr Alanis called family to say he was hiding and possibly fleeing agents before he fell around 30ft (9m) from the roof and broke his neck, according to information from family, hospital and government sources.
Agents arrested 200 people suspected of being in the country illegally and identified at least 10 immigrant children on the sites, the DHS said in a statement.
Mr Alanis was not among them, the agency said.
“This man was not in and has not been in CBP (Customs and Border Protection) or ICE custody,” DHS assistant secretary for public affairs Tricia McLaughlin said.
“Although he was not being pursued by law enforcement, this individual climbed up to the roof of a greenhouse and fell 30ft. CBP immediately called a medivac to the scene to get him care as quickly as possible.”
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Four US citizens were arrested during the incident for allegedly “assaulting or resisting officers”, the DHS said, and authorities were offering a $50,000 reward for information leading to the arrest of a person suspected of firing a gun at federal agents.
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In a statement, Glass House, a licensed Cannabis grower, said immigration agents had valid warrants. It said workers were detained and it is helping provide them with legal representation.
“Glass House has never knowingly violated applicable hiring practices and does not and has never employed minors,” it added.
Donald Trump has said he is considering “taking away” the US citizenship of actress and comedian Rosie O’Donnell, despite a Supreme Court ruling that expressly prohibits a government from doing so.
In a post on Truth Social on Saturday, the US president said: “Because of the fact that Rosie O’Donnell is not in the best interests of our Great Country, I am giving serious consideration to taking away her Citizenship.”
He also labelled O’Donnell, who has moved to Ireland, as a “threat to humanity” and said she should “remain in the wonderful country of Ireland, if they want her”.
O’Donnell responded on Instagram by posting a photograph of Mr Trump with Jeffrey Epstein.
“You are everything that is wrong with America and I’m everything you hate about what’s still right with it,” she wrote in the caption.
“I’m not yours to silence. I never was.”
Rosie O’Donnell moved to Ireland after Donald Trump secured a second term. Pic: AP
O’Donnell moved to Ireland with her 12-year-old son in January after Mr Trump had secured a second term.
She has said she’s in the process of obtaining Irish citizenship based on family lineage and that she would only return to the US “when it is safe for all citizens to have equal rights there in America”.
O’Donnell and the US president have criticised each other publicly for years, in an often-bitter back-and-forth that predates Mr Trump’s move into politics.
Please use Chrome browser for a more accessible video player
Will Trump address parliament on UK state visit?
This is just the latest threat by the president to revoke the citizenship of someone he has disagreed with, most recently his former ally Elon Musk.
But the two situations are different as while Musk was born in South Africa, O’Donnell was born in the US and has a constitutional right to American citizenship.
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Amanda Frost, a law professor at the University of Virginia School of Law, said the Supreme Court ruled in a 1967 case that the fourteenth amendment of the constitution prevents the government from taking away citizenship.
“The president has no authority to take away the citizenship of a native-born US citizen,” he added.
“In short, we are nation founded on the principle that the people choose the government; the government cannot choose the people.”
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