AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TALLAHASSEE FL 849 PM EST Thu Jan 5 2012 .UPDATE... 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.