Dense Fog Advisory issued March 4 at 10:59PM EST until March 5 at 10:00AM EST by NWS Baltimore MD/Washington DC

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

* WHERE...
Portions of central Maryland and northern Virginia, and the north-central Shenandoah Valley.

* WHEN...
Until 10 AM EST Thursday.

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

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