1.   Heavy rainfall decreased visibility from seven miles to one mile in that period.

2.   Patches of fog will decrease visibility.

3.   Driving was treacherous throughout the East as snow turned to sleet and freezing rain in some areas and high winds decreased visibility elsewhere.

4.   Taft later said Serb police had decreased their visibility, noting she passed only three checkpoints during her travels Sunday, compared to the dozens that used to exist.