1.   While they slept, heavy clouds swirled over the valley in massed ranks and the snow began to fall.

2.   A funnel cloud swirled briefly near Brownsville, Texas, on Wednesday as scattered showers moved across the area.

3.   By mid-afternoon, gun-metal gray clouds are swirling around us.

4.   Dark clouds swirled in a snail-shaped spiral before lightning bolts flashed over the pyramids.

5.   Dust kicks up with the lightest footstep, and great clouds of it swirl with the slightest breeze, stinging eyes and choking throats.

6.   The way the clouds swirled scared me.

7.   Particles collide, and clouds swirl in brilliant glowing colors.

8.   The area around the embassy in central Moscow was rocked by the explosion and a thick cloud of smoke swirled around the front of the compound.

9.   The grenade hit the facade at the level of the sixth floor with a huge boom, and a thick cloud of smoke swirled around the embassy.

10.   The grenade hit with a huge boom and a thick cloud of smoke swirled in front the embassy, on the busy ring road in central Moscow.