With reporters sworn to secrecy and a beefed-up security retinue in tow, his helicopter took off in the dim early morning light Wednesday bound for the heavily fortified border.

Press Secretary Sarah Huckabee Sanders had announced the destination by scrawling the letters “’DMZ” on a notepad, saying that was how she was told to communicate the sensitive information.

But plans for the grand reveal were botched by Mother Nature, and Sanders described Trump as disappointed – and “pretty frustrated.”

The snafu is a particularly humbling moment for a win-focused president. Trump has employed increasingly tough rhetoric against North Korea over its continued nuclear and ballistic missile programmes, but found his DMZ power-play derailed by weather.

Just after daybreak, Trump’s motorcade had departed unannounced for Yongsan Garrison, a US Army base in Seoul, where a fleet of military helicopters was standing by for the roughly 55 kilometre flight to the DMZ.

Trump had been expected to arrive at Observation Post Ouellette, the closest post to the 1953 armistice line, where he would follow his three direct predecessors in peering into North Korea.

But visibility below one mile and misting conditions determined otherwise.

Trump was travelling in a five-helicopter air convoy, consisting of two identical VH-60Ns – Marine One and a decoy – and three Chinooks carrying press, aides, and heavily-armed security.

As they neared the DMZ landing site, the pilots were unable to see the other helicopters around them, Sanders said.

Military pilots, in conjunction with the US Secret Service, decided it was unsafe to continue, and the helicopters reversed course and returned to Yongsan.

Undeterred, Trump waited nearly an hour in his armoured limousine near the helicopters in hopes of a clearing in the weather, but none was forthcoming.

White House staff, including Sanders and chief of staff John Kelly, passed the time making frequent glances at the overcast sky.

Just before 9am, the final call was made: the stop was off. Trump’s 11am address to the South Korean National Assembly could not be delayed to accommodate a later trip.

Trump had also been expected to visit with families of diplomats at the US embassy in Seoul, but first lady Melania Trump filled that engagement.

Trump was set to depart Seoul for Beijing, China after the Assembly address. The elaborately choreographed arrival ceremony there, which has been timed to sunset, meant Trump could not afford to visit the DMZ later Wednesday.

In advance of the 12-day trip, White House officials had publicly dismissed the idea of a visit to the DMZ as “a little bit of a cliché”.

But behind the scenes, Trump made clear to aides he intended to follow through with the presidential rite of passage.

Shrouded in secrecy and symbolism, presidential visits to American troops stationed in South Korea and the DMZ have become a staple of trips to the peninsula for decades.

Every president since Ronald Reagan has visited the 1953 armistice line, except for George H.W. Bush, who visited when he was vice-president.

The show of bravado and support for one of America’s closest military allies has evolved over the years to include binoculars and bomber jackets.

South Korean President Moon Jae-in was set to join Trump at the DMZ, but was diverted as well. The South Korean leader landed at an alternate site about a 20-minute drive from the DMZ, but that was not a possibility for Trump, given the logistics of moving his larger motorcade along streets that hadn’t been secured.

“For President Moon and President Trump to go to together would have been historic, it was supposed to be a symbol of the strong alliance,” Sanders said once Trump returned to his hotel.

“I think that they were both planning shows the importance.”