Dense Fog Advisory issued December 18 at 3:12AM EST until December 18 at 10:00AM EST by NWS Greenville-Spartanburg SC

* WHAT...
Visibility dropping to one quarter mile or less in dense fog.

* WHERE...
Most of northeast Georgia, western North Carolina, and Upstate South Carolina.

* WHEN...
Until 10 AM EST this morning.

* IMPACTS...
Low visibility could make driving conditions hazardous.

* ADDITIONAL DETAILS...
Some locations have seen fog become more patchy or variable in thickness since late evening but have recently improved. Such locations are likely to see visibilities worsen again, at least for short periods, before the fog dissipates altogether in late morning.

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