More than 80 years later, Ms Coppin has realised how terrifying it must have been after floodwaters again closed in on the Western Australian property.
Yarrie Station is still inundated after widespread flooding in the Pilbara region was sparked by Cyclone Zelia crossing the northwest coast days ago.
Station owner Ms Coppin had some "hairy moments" as she watched floodwaters reach levels not seen since 1941 when her grandmother lived at the homestead.
"We always heard about nan's story, how she hopped on the roof as water lapped at the homestead," Ms Coppin told AAP.
"Now it has happened to me 80 years later, I can fully appreciate the terror she must have felt.
"Our circumstances were a lot better. I had a phone, a torch. Imagine what it was like back then (1941), holy smokes."
Back then her grandmother sought refuge on the rooftop alongside a homemade raft.
Ms Coppin took a leaf out of her nan's book as the water kept coming - and coming - in Cyclone Zelia's wake.
"We did have a plan. We had a ladder, couple of swags, some life jackets and a canoe up there (on homestead roof)," she said.
In the end Ms Coppin was spared a trip to the roof when floodwaters finally eased as it lapped her homestead's door step.
"It would have been the same level of the flood in 1941, the biggest I have ever seen it," she said.
Flooding remains at the cattle station days later but Ms Coppin said other properties had it worse.
Pilbara's De Grey River catchment is one of the hardest hit, with locals told to "prepare for isolation".
There is also a flood warning for parts of the Sandy Desert.
"The Pilbara is the most common cyclone crossing in the world, so it is not unusual," Ms Coppin said.
"We lost a lot of fencing and a few solars (panels) with the wind but it is a hell of a lot better than a drought."
Floodwaters also remain in north Queensland after record rainfall, with more showers forecast for Thursday.
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