The phrase "a sudden mountain" is correct and usable in written English.
It can be used to describe an unexpected or abrupt appearance of a mountain, often in a metaphorical or poetic context.
Example: "As we drove through the valley, a sudden mountain loomed before us, catching us off guard with its towering presence."
Alternatives: "an abrupt mountain" or "a sudden rise".
"When you grow up in an organization and you get an opportunity to build it, you get near the top of the mountain and, all of a sudden, the mountain crumbles," he said.
And every day that the snows do not go gently down the stream raises the possibility of melting into late June and even July, when sudden mountain downpours can set off flash floods, dangerous even without a freight of snow behind them.
Franschhoek, like Hollywood, is indeed special, but for strikingly different reasons: set in an isolated valley enclosed by severe and sudden mountains, it is perhaps the most elegant and sophisticated small town in South Africa, and one of the three main centres to visit on any tour of the winelands of the Western Cape.
As the pair worked their way down the mountain, a sudden storm hit, reducing visibility to near zero.
All of a sudden, with two major mountain stages remaining, Nibali looks in complete control, having looked utterly composed throughout the time trial, in spite of the heavy rain that drenched the later starters.
Working around the protected mature oak trees, "we started to clean up the yard, and then all of a sudden we saw this mountain," Hoshino says.
The music changed as we set our glasses down, there was a sudden assault of gaidi, the mountain bagpipes ubiquitous in folk music, and then a syncopated rush of drums that made both our faces break open in smiles.
Written in a pared-down, Hemingway-like style, "Williwaw" (the title is a meteorological term for a sudden wind out of the mountains) won some admiring reviews but gave little clue to the kind of writer Mr. Vidal would become.
Winterbottom thinks nothing of switching from a kind family on the Turkish frontier, who take in the Afghans, feed them, play soccer with them, and sprinkle water and drops of fire to bless their departure, to a sudden hellish slog over the mountains, filmed by night in black-and-white, with snow up to our heroes' knees and gunshots flaring in the distance.
He shows himself rowing, aching for land, as a sudden coastal storm engulfs a nearby mountain.
