Overview
- NWS Huntsville issued a freezing fog advisory for Madison, Marshall, Jackson and DeKalb counties in North Alabama until 9 a.m. Sunday.
- NWS Hanford posted a dense fog advisory for I‑5 through the Grapevine until 11 a.m. Sunday, with visibility down to a quarter mile or less.
- Central Alabama also faced a dense fog advisory until 10 a.m., with pockets of visibility at or below a quarter mile.
- Forecasters note the thickest freezing fog in valleys and near large bodies of water, including the Tennessee River, Paint Rock and Big Wills valleys and around Lake Guntersville.
- Safety guidance includes slowing down, using low‑beam headlights and extra following distance, with instructions to pull into a safe location and leave only hazard flashers on if visibility nears zero.