...Areas of fog this morning...
Areas of fog continue to develop this morning. Visibilities vary
from place to place, but are down to one half mile or less in
many locations. The fog will continue through sunrise then begin
to burn off and dissipate between 8 and 9 AM.
Motorists should be alert for sudden changes in visibility due to
the areas of dense fog. Drive at reduced speeds...watch for
children at school bus stops...and use low beam headlights only.

...SATURATED GROUND MAY LEAD TO FALLING TREES THIS MORNING...
Heavy thunderstorms produced torrential rain over portions of
central and northern Virginia, the northwest suburbs of Washington
DC and the Baltimore metro area overnight. The saturated ground
may cause some trees to topple this morning. Please remain extra
alert for the possibility of trees coming down and blocking
roadways through the morning commute.