An amber weather warning for wind came into place for parts of northern England, Scotland and Wales earlier today, and the Met Office has now said the storm will "continue to deepen" in the coming days.
The amber alert warns flying debris could lead to "injuries or danger to life".
Heavy snow and gale-force winds will also bring disruption, with winds of up to 66mph already being recorded in Capel Curig, north Wales.
Parts of Lancashire, North Yorkshire, Northumberland, north Wales and Scotland are covered by the amber warning, which came into effect at 7pm and is due to remain in place until 3am on Sunday.
The Met Office said that "while some uncertainty remains in the exact track and shape of Storm Dave, a spell of strong southwesterly winds is expected".
Meanwhile, four separate yellow weather warnings from the Met Office came into force on Saturday afternoon:
• An alert for wind covering northern England, parts of Scotland and part of Wales is active until 7am tomorrow
• A separate warning for wind across the whole of Northern Ireland is in place until 3am
• The whole of mainland Scotland and a part of northeast England also faces a yellow warning for wind until 12pm tomorrow
• A yellow alert for snow applies to the Scottish Highlands until 3am
Storm Dave will be at its worst later on Saturday, but will weaken on Sunday as it blows into the North Sea.
Travel disruption on the roads - as well as on rail, air and ferry services - is possible.
Large waves could cause dangerous conditions along the coastline, and there may be 80mph gusts in exposed areas.
Meanwhile, the Energy Networks Association (ENA), which represents electricity network operators, said on Saturday: "The storm has the potential to affect local power infrastructure, increasing the risk of a power cut and fallen power lines.
"Network operators are increasing staffing for operational teams, and moving spare equipment to where the weather is expected to be most disruptive, so it's ready to use if needed."
Met Office meteorologist Greg Dewhurst said that once Storm Dave passes, parts of the UK will have a spell of warm weather.
He predicted "heavy snow" would form across parts of the Highlands through Saturday afternoon, evening and night and "as much as 20-30cm (8-12 inches) could fall over the higher ground, and 5-10cm (2-4 inches) over lower ground".
But warmer air arrives from Europe after Easter Monday, bringing higher temperatures through Tuesday and into Wednesday, he said.
England and Wales could "see temperatures rising to the low 20s, with highs around 20C (68F) or 21C (70F) on Tuesday, and possibly 23C (73F) or 24C (75F) come Wednesday".
Southeast England could enjoy the best of the sun on Wednesday, "where 23C and 24C is most likely".
Scotland's First Minister John Swinney warned of "really quite challenging conditions" later on Saturday and urged people to "follow all of the advice that's available and to make sure they stay safe".
George Fiddes, from Transport Scotland, said motorists "should check their planned routes before setting off".
Some areas could also experience power cuts.
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Earlier this week, the RAC predicted that it could be the busiest Easter on the roads since 2022 - with ABTA estimates indicating two million people were planning to travel abroad.
In Scotland, Network Rail has warned that the East Coast Main Line and services on the Ayrshire coast could be most affected by the extreme weather.
A further arrest in connection with the incident was made at the court, the Crown Prosecution Service said.
Four ambulances from Hatzola, a volunteer-led ambulance service, were destroyed in the early hours of 23 March in north London.
Hamza Iqbal, 20, and Rehan Khan, 19, both British nationals from Leyton, were on Friday charged with arson being reckless as to whether life would be endangered.
A 17-year-old boy, a dual British and Pakistani national from Walthamstow, who cannot be named for legal reasons, was also charged with the same offence.
The group, who were all arrested on Wednesday at different locations in east London, appeared at Westminster Magistrates' Court on Saturday.
Prosecutor Emma Harraway told the court: "There is significant evidence that this was a premeditated and targeted attack against the Jewish community."
The defendants spoke only to confirm their personal details. As Iqbal was taken to the cells, someone in the public gallery said: "Take care son, yeah."
Iqbal and Khan were remanded in custody, while the 17-year-old will be held in youth detention accommodation. They are all due to appear at the Old Bailey on 24 April.
The court heard prosecutors do not yet know the motivation for the alleged attack.
The Metropolitan Police said the additional arrest took place after officers attending the hearing "recognised the man as being involved in the arson attack".
He was arrested for arson with intent to endanger life and has been taken into custody.
The case is not being treated as terrorism but Counter Terrorism Policing (CTP) said its detectives are leading the investigation due to "the circumstances of the incident".
When the four ambulances were set on fire, the resulting blaze caused gas canisters stored in the vehicles to explode, and nearby homes were evacuated as a precaution.
Residents describe being woken by the noise, with the force of the explosions blowing out windows, including those of the nearby synagogue.
The government loaned the charity four ambulances to replace those that were destroyed, and has said it would cover the cost of new vehicles.
An appeal has raised more than £3.2m to find new, safer premises for the Hatzola ambulance service in Golders Green.
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Separately, two men aged 45 and 47, arrested last Wednesday, have both been released on bail until later in April.
Detective Chief Superintendent Luke Williams, who leads policing in northwest London, said a "bespoke policing plan" has been deployed at vulnerable areas across London, including Golders Green.
He added: "This has involved a significant number of additional officers on the ground. It is also being supported by highly visible armed police patrols to serve as a deterrent to anyone seeking to cause our communities harm."
The incident, which came to light on Friday night, happened earlier this week and five people have been temporarily suspended from frontline duties while an investigation takes place.
Jordan Griffiths called the police after his girlfriend, who is eight months pregnant, found a bag of weapons, including a submachine gun, in a road in south London.
Speaking to Sky News, 30-year-old Griffiths said he initially worried he could end up jailed.
"I put [the bag] on the bed, opened the zip and the first thing I pulled out was the Taser," he said. "I was like, 'oh my god'. Pulled out another one and it was a Glock [pistol].
"Opened up the big bit and the MP5 [submachine gun] was there. I was like, 'what am I going to do now? Am I going to go to prison for this?'. I didn't know what to do."
Mr Griffiths called the police and officers soon arrived to retrieve the bag.
"Anyone could have picked it up, to be honest," he said. "Lucky enough, I came outside and rang the police but anyone could have picked it up.
"There's loads of troublemakers around here. [The mayor's] security have let everyone down, really."
The Metropolitan Police's Directorate of Professional Standards has confirmed it is reviewing what happened.
In a statement, it said: "A member of the public called police after finding a bag containing Met-issued firearms and a Taser on a street in south London.
"Within seven minutes of the call to police, officers arrived at the scene and safely recovered the items.
"At this stage, it is believed the bag was misplaced by on-duty officers a short time before the member of the public located it."
The incident happened at about 9.40pm on Tuesday.
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Griffiths previously told The Sun that police were "really shocked" when they arrived.
"I was told [the guns] had been left there by one of Sadiq Khan's security officers, which made sense as he lives here," he added.
A spokesperson for the mayor said: "This is a very serious incident, which has been referred to the Met's Directorate of Professional Standards.
"The Met must now take all steps to ensure an incident like this never occurs again."
Police were called by the ambulance service after a report of a collision between a Volkswagen Touareg and a pedestrian on Rose Tree Avenue in the Cudworth area of the Yorkshire town around 4.55pm on Friday.
The pedestrian, a 45-year-old man, died at the scene, South Yorkshire Police said in a statement.
His family have been informed and are being supported by officers, the force said.
A 60-year-old man and a woman aged 38 were arrested on suspicion of murder on Friday and are still in custody.
A 17-year-old boy and a 33-year-old man were arrested on Saturday on the same charge, the force said. They are also in custody.
Detective Chief Inspector Simon Cartwright appealed to anyone with information about the incident to contact them.
He said the investigation into "this tragic incident is still in its early stages and our thoughts first and foremost are with the victim's family, friends and loved ones".
"Officers will remain in Rose Tree Avenue carrying out further enquiries."
A crime scene remains in place in the area as police carry out enquiries.
The president's plea for the money was included in a proposed budget plan released by the White House to fund the US federal government for the 2027 financial year.
Such spending requests are normally seen as suggestions by Congress.
The Federal Bureau of Prisons would use the investment to cover the first-year costs of rebuilding Alcatraz into "a state-of-the-art secure prison facility", the plan said.
The jail, on an island in San Francisco Bay in northern California, closed in 1963, and was opened to the public in 1973 as part of the US National Park Service.
Last May, Mr Trump said in a social media post that he had told the bureau, along with the US Department of Justice and other agencies to "reopen a substantially enlarged and rebuilt Alcatraz, to house America's most ruthless and violent offenders".
It would "serve as a symbol of law, order, and justice", in a country that had been "plagued by vicious, violent, and repeat criminal offenders, the dregs of society", he wrote.
Alcatraz Federal Penitentiary, which opened in 1934, had been billed as the most secure prison in the US, given the island location, frigid waters and strong currents.
Authorities said escape was impossible, but in the 29 years it was open, 36 men made 14 separate attempts, according to the FBI.
No successful escapes were ever officially recorded, though five prisoners are listed as "missing and presumed drowned".
The story of three of those inmates was turned into the highly successful 1979 film, Escape From Alcatraz, starring Clint Eastwood.
Alcatraz Island was also the setting for the 1996 movie, The Rock, starring Sean Connery and Nicolas Cage.
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Gangsters Al Capone, George 'Machine Gun' Kelly and James 'Whitey' Bulger are among its best-known former inmates.
It has since become a major tourist site, attracting more than a million visitors a year, according to its website.