The phrase "a lowering sky" is correct and usable in written English.
It can be used to describe an overcast or ominous sky, often indicating impending rain or a storm.
Example: "As we walked along the beach, we noticed a lowering sky that hinted at the storm approaching from the horizon."
Alternatives: "an ominous sky" or "a darkening sky".
A series of grassy mounds and banks stand lime-green vivid against a lowering sky.
It begins mysteriously, portentously, with two youngish men walking purposefully over moorland under a lowering sky.
But more crucial still are atmosphere, the cast of the light, a lowering sky, or tones of warm and cool.
Antony, Dave, Spencer and I arrived there under a lowering sky after two hard days in the saddle.
Under a lowering sky, on the far horizon, you can see the domes, minarets and hotel skyscrapers of Jerusalem.
The second film, The Boy from Mars (2003), takes us to a tropical compound under a lowering sky.
That was as much charity as they got, however, and they were duly swept up as the peloton sped between the sea and the lowering sky at Cap Gris Nez, cooled by a fret whisked into their faces by a wind which was strong enough to overturn the crowd barriers at one point close to the finish.
For short periods it hailed, and the lowering sky appeared to threaten snow.
But the dark clouds and lowering sky, pelting the armory, shrine and sleeping quarters with rain, set the mood as nothing else could have done.
I could have done with a little more of Denis Lavant (so good as a crumpled priest who upbraids Kohlhaas for his arrogance) and Roxane Duran (as the capricious princess of Angoulême) and a little less of the lowering skies, the clattering swords and the squealing of pigs.
But for all its rain and lowering skies, I give it a much better chance than Margate.
