The Captain glanced at the radar screen, where the cloud mass was just beginning to show.

Moving little, a broad surface low developed with the cloud mass, and a tropical wave moved through the area.

They were high above the cloud mass in a world of enchanted silver moonlight.

By some freak of wind and weather, a deep hole opened in the cloud mass beneath them.

The cloud mass was now angling in rapidly across their front.

The last colors faded from the sky or were blotted out by the cloud masses.

On May 22, a tropical depression (a large and organized cloud mass) formed.

The satellite photograph received on the morning of December 1 showed that significant organization had occurred in the cloud mass during the previous 24 hours.

The alien pointed left, where cloud masses covered all surface features.

Now dark cloud masses could be seen drifting over from the northeast.