849 PM EST Thu Jan 5 2012

The main concern for the overnight period is the potential for
dense FOG. The AIR mass has modified quite a bit compared to 24
hours ago with a significant increase in boundary layer MOISTURE.
HIGH PRESSURE is forecast to be centered near the area with clear
skies and light winds. The condensational pressure deficits are
forecast to be quite LOW by our local HI-res ARW AS well as the
NAM and RUC, especially over the southern half of the forecast
area. Correspondingly, the guidance consensus shows the highest
dense fog probabilities over the Florida zones as well as extreme
southern Georgia and southeast Alabama. This area was already
forecast to have the greatest fog coverage late tonight by the
previous shift, and added some general dense wording with the
evening update. Confidence is not yet high enough to go with a
dense fog ADVISORY, but the NIGHT shift will monitor in case it
becomes necessary.