Dark clouds are gathering in the western sky.
ominous signs; threatening clouds (figurative)
Figurative use for a situation where trouble or danger seems imminent; often appears in phrases like 暗雲が漂う or 暗雲が立ちこめる.
Ominous clouds began to hang over the relations between the two countries.
Dark clouds are gathering over the economic outlook.
Ominous signs are hanging over relations between the two countries.
Dark clouds are spreading over the future of the negotiations.
The new agreement dispelled the dark clouds hanging between the two companies.