BIRMINGHAM, Alabama — Visibility is down to a few hundred feet in parts of central and south Alabama because of dense fog.
Traffic slowed to a crawl in some areas early Tuesday amid the heavy fog.
Several wrecks snarled rush-hour traffic around Birmingham but it's unclear whether the crashes had anything to do with the weather.
The National Weather Service issued an advisory saying visibility was down to a quarter-mile and less across a broad section of central and southern Alabama.
Forecasters expected the fog to clear by midmorning.
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