JACKSONVILLE, Fla. -- The heat and humidity will build through Friday.

Then a cool front arrives Saturday and helps with the heat, but this cool front will eventually become a strong nor'easter.

Showers will increase with the cool front later Friday into Saturday. Then heavier rainfall totals will begin to add up Sunday-Tuesday, especially along the coastal counties .

The strong onshore flow combined with a waxing moon heading toward full will keep tidal levels high.