Canadian high pressure will build over the region today with much colder drier air moving over the region. Lows tonight will range from 28 degrees across the nature coast to around 40 south. A bit warmer along the coast. Wind chills will drop into the mid 20s north, upper 20s central, and lower 30s south. A Freeze Watch is in effect for Wednesday morning for Levy, Citrus, Sumter, and Hernando counties. A cold weather advisory is in effect for all of west central and southwest Florida.