1.   Beware of snow showers, because they can reduce visibility to a few yards, making a safe landing impossible.

2.   Rolls of thunder joined the gunfire now, like giant echoes, and it began to rain, reducing visibility.

3.   The fog reduced visibility to a quarter of a mile.

4.   As a result, analysts stop following them, which reduces their visibility on Wall Street.

5.   At on- and off-ramps, huge walls of snow have reduced visibility.

6.   At one point, he said visibility was reduced to one-sixteenth of a mile at Kennedy, one-eighth at LaGuardia, and one-half at Newark.

7.   At times, blowing beach sand reduced visibility to near zero along the highway on Hatteras Island.

8.   Blowing dust will reduce visibility at times.

9.   After the first few skiers, the rain began, softening the course to a treacherous consistency and reducing visibility.

10.   All the while, visibility must be reduced to one-quarter of a mile or less in blowing or falling snow.