High pressure was centered off the Atlantic Coast.  Southerly flow drew in moisture off from the south and off the Atlantic.  Calm winds after sunset led to widespread dense fog.

Dense Fog in ALBEMARLE, VIRGINIA
From 12-JAN-13 01:53:00 to 12-JAN-13 11:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Visibility was reported around a quarter mile at Charlottesville Airport and by satellite.

Dense Fog in GREENE, VIRGINIA
From 12-JAN-13 01:53:00 to 12-JAN-13 11:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Visibility was reported around a quarter mile at Charlottesville Airport and by satellite.

Dense Fog in MADISON, VIRGINIA
From 12-JAN-13 01:53:00 to 12-JAN-13 11:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Visibility was reported around a quarter mile at Charlottesville Airport and by satellite.

Dense Fog in RAPPAHANNOCK, VIRGINIA
From 12-JAN-13 01:53:00 to 12-JAN-13 11:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Visibility was reported around a quarter mile at Charlottesville and Dulles International Airports and by satellite.

Dense Fog in LOUDOUN, VIRGINIA
From 12-JAN-13 01:52:00 to 12-JAN-13 11:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Visibility was reported around a quarter mile at Dulles International and Leesburg Airports.

Dense Fog in NORTHERN FAUQUIER, VIRGINIA
From 12-JAN-13 01:52:00 to 12-JAN-13 07:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Visibility was reported around a quarter mile at Dulles International and Leesburg Airports.

Dense Fog in ORANGE, VIRGINIA
From 12-JAN-13 01:15:00 to 12-JAN-13 11:35:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Visibility was reported around a quarter mile at Orange Airport.

Dense Fog in STAFFORD, VIRGINIA
From 12-JAN-13 06:35:00 to 12-JAN-13 10:35:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Visibility was reported around a quarter mile at Stafford Airport.

Dense Fog in PRINCE WILLIAM, VIRGINIA
From 12-JAN-13 05:56:00 to 12-JAN-13 13:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Visibility was reported around a quarter mile at Quantico Airport.

Dense Fog in KING GEORGE, VIRGINIA
From 12-JAN-13 05:56:00 to 12-JAN-13 13:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Visibility was reported around a quarter mile at Quantico Airport.

Dense Fog in ROCKINGHAM, VIRGINIA
From 12-JAN-13 05:35:00 to 12-JAN-13 08:45:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Visibility was reported around a quarter mile at Shenandoah Airport.

Dense Fog in FREDERICK, VIRGINIA
From 11-JAN-13 22:55:00 to 12-JAN-13 08:35:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Visibility was reported around a quarter mile at Winchester Airport.

Dense Fog in PAGE, VIRGINIA
From 12-JAN-13 01:15:00 to 12-JAN-13 11:05:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Visibility was reported around a quarter mile at Luray Airport.

Dense Fog in WARREN, VIRGINIA
From 12-JAN-13 01:15:00 to 12-JAN-13 11:05:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Visibility was reported around a quarter mile at Luray Airport.

Dense Fog in CLARKE, VIRGINIA
From 11-JAN-13 23:55:00 to 12-JAN-13 08:35:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Visibility was reported around a quarter mile at Winchester Airport.