To the west, clouds obscured most of the front range.

Eventually, clouds moving in from the west obscured the sun.

High clouds obscured the stars, but I could sense the hour more or less.

The clouds obscured the sun now and the air was cool.

Clouds obscured all but the final 300 feet of the 3,212-foot-long falls.

Then the clouds obscured all vision, and snow began to fall.

For a moment a cloud of steam obscured his view.

Just now a cloud was obscuring the sun, but it passed.

There was no moon, and light clouds obscured the stars.

For a moment clouds obscured the moon and she had to pick her way more slowly.