Morgan said all of the adults apart from her father broke ribs “from the impact of the seat belts holding them in”.
“Except for my youngest brother, who was four at the time,” she added. “[He] was sitting on my dad’s knee, and instead of my dad’s ribs cracking, it cracked my brother’s spine.”
Her parents chose to stay in hospital with her younger brother in Spain before he could be stretchered back to the UK – while Morgan returned home with her other two brothers, with the three having “escaped relatively unscathed”.
“And that was, obviously, a terrifying experience – coming back to Wales without parents, after quite a traumatic event,” she said.
But the first minister said the accident came at an age where she was “just too young for it to have had that profound impact”.
Morgan said she took her parents back to the golf course a “number of years later” to thank people there who were “really kind and generous to us” after the crash.
Speaking ahead of her return to the area, she said: “It’s lovely to go back now, to say thank you to them for the support that they gave us, and, obviously, we’ll give thanks every day for the fact that we survived what could have been a very, very tragic situation.”
Morgan signed a new agreement with Catalonian President Salvador Illa in Barcelona on Wednesday which commits to working together on matters including technology, renewable energy, trade, investment, language and culture.
On Thursday she will sign one with Basque Country President Imanol Pradales.