1.   Dense fog will obscure the west slopes of the southern Appalachians.

2.   Fog will obscure parts of southern California.

3.   Fog had completely obscured his view.

4.   Fog will obscure sections of the Appalachians.

5.   Fog will obscure sections of the western Gulf Coast with broken clouds covering most of the southern Plains and lower Mississippi Valley.

6.   Her lawsuit charges that Norfolk Southern knew the crossing was sometimes obscured by fog, but took no action to properly warn drivers.

7.   Nothing does, or if it did, the fog obscured it.

8.   Outside, fog obscured the top floors of the hospital, but somewhere, somehow, the sun shines on most of us.