A new, ominous wall of gray-black clouds was rolling in.

Far above, silhouetted beneath the canopy of gray-black cloud, a deep V cut the serrated skyline.

Fans roared into life overhead, swirling back the gray-black cloud like a curtain as the simulator cracked open with a loud, hydraulic hissss.

The sky became a sheet of scudding gray-black clouds, utterly hiding the sun.

The low sky was mottled with gray-black clouds.

Night had fallen early, the gray-black clouds snuffing what little sunlight might have lingered had the day been clear.

Beneath a sky of dense gray-black cloud, Wang Sau-leyan stood before the open tomb, his cloak pulled tight about him, staring wide-eyed into the darkness below.

From horizon to horizon, a solid mass of lowering gray-black clouds rolled eastward, driven by a strong high-altitude wind.

The rain died away into fitful showers and finally stopped, though the stiff north wind kept whipping bank after bank of ugly gray-black clouds across the sky.

Josh looked up and saw a great gray-black cloud looming from the south.