cirrus
cirrus cloud

The view behind them is blue sky and cirrus clouds.

Nothing to be seen but a few cirrus clouds, high up and moving fast.

And cirrus clouds may trap some warm air at night.

Cirrus clouds generally appear white or light gray in color.

He appears to be standing on the tops of cirrus clouds.

It was also determined that cirrus clouds formed in the area.

Cirrus clouds cover up to 25% of the Earth and have a net heating effect.

That long dark streak without any preceding cirrus clouds is a cold front.

The night was clear but high cirrus clouds presaged rain for later.

Visual observations from aircraft or the ground provide additional information about cirrus clouds.