A disturbance in the northern branch of the jet stream was able to phase with low pressure in the southern branch of the jet stream over the Southeast Coast on the night of the 18th. These two systems combined to develop a strong area of low pressure that slowly track up the Mid-Atlantic Coast during the 19th. The low was able to tap into moisture from the Gulf of Mexico and the Atlantic Ocean causing copious amounts of precipitation to develop. High pressure to the north kept plenty of cold air in place causing the precipitation to fall in the form of snow.

Winter Storm in LOUDOUN, VIRGINIA
From 18-DEC-09 19:00:00 to 19-DEC-09 23:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall amounts were reported between 18 and 22 inches across the county.

Winter Storm in NELSON, VIRGINIA
From 18-DEC-09 17:00:00 to 19-DEC-09 21:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall amounts up to 30 inches were reported at Wintergreen.

Winter Storm in PAGE, VIRGINIA
From 18-DEC-09 17:00:00 to 19-DEC-09 21:00:00 (EST-5)
Reported by: Trained Spotter

Seventeen inches of snow fell at Luray.

Winter Storm in PRINCE WILLIAM, VIRGINIA
From 18-DEC-09 19:00:00 to 19-DEC-09 23:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall amounts were reported between 18 and 19 inches across the county.

Winter Storm in SHENANDOAH, VIRGINIA
From 18-DEC-09 19:00:00 to 19-DEC-09 23:00:00 (EST-5)
Reported by: Trained Spotter

A report of 17.5 inches of snow was received fro near Toms Brook.

Winter Storm in KING GEORGE, VIRGINIA
From 18-DEC-09 19:00:00 to 19-DEC-09 23:00:00 (EST-5)
Reported by: Unknown

Snowfall amounts were estimated between 15 and 20 inches across the county.

Winter Storm in HIGHLAND, VIRGINIA
From 18-DEC-09 17:00:00 to 19-DEC-09 21:00:00 (EST-5)
Reported by: Unknown

Snowfall amounts were estimated between 20 and 25 inches across the county.

Winter Storm in ROCKINGHAM, VIRGINIA
From 18-DEC-09 17:00:00 to 19-DEC-09 21:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall amounts between 20 and 22 inches across the county.

Winter Storm in SPOTSYLVANIA, VIRGINIA
From 18-DEC-09 17:00:00 to 19-DEC-09 21:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall amounts between 18 and 19 inches were reported across the county.

Winter Storm in STAFFORD, VIRGINIA
From 18-DEC-09 17:00:00 to 19-DEC-09 21:00:00 (EST-5)
Reported by: Trained Spotter

Fourteen inches of snow was received from Falmouth.

Winter Storm in WARREN, VIRGINIA
From 18-DEC-09 19:00:00 to 19-DEC-09 23:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall amounts of 21 to 27 inches were reported across the county.

Winter Storm in ORANGE, VIRGINIA
From 18-DEC-09 17:00:00 to 19-DEC-09 21:00:00 (EST-5)
Reported by: Unknown

Snowfall amounts were estimated between 15 and 20 inches across the county.

Winter Storm in GREENE, VIRGINIA
From 18-DEC-09 17:00:00 to 19-DEC-09 21:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall amounts were reported between 17 and 20 inches across the county.

Winter Storm in ARLINGTON, VIRGINIA
From 18-DEC-09 19:00:00 to 19-DEC-09 23:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall amounts were reported between 16 and 21 inches across the county.

Winter Storm in ALBEMARLE, VIRGINIA
From 18-DEC-09 17:00:00 to 19-DEC-09 20:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall amounts were reported between 19 and 23 inches across the county.

Winter Storm in CLARKE, VIRGINIA
From 18-DEC-09 19:00:00 to 19-DEC-09 23:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall amounts were reported between 21 and 22 inches across the county.

Winter Storm in FAUQUIER, VIRGINIA
From 18-DEC-09 19:00:00 to 19-DEC-09 23:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall amounts were reported between 18 and 22 inches across the county.

Winter Storm in FREDERICK, VIRGINIA
From 18-DEC-09 19:00:00 to 19-DEC-09 23:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall amounts were reported between 18 and 19 inches across the county.

Winter Storm in AUGUSTA, VIRGINIA
From 18-DEC-09 17:00:00 to 19-DEC-09 21:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall amounts were reported between 26 and 28 inches across the county.

Winter Storm in FAIRFAX, VIRGINIA
From 18-DEC-09 19:00:00 to 19-DEC-09 23:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall amounts were reported between 18 and 23 inches across the county.

Winter Storm in CULPEPER, VIRGINIA
From 18-DEC-09 17:00:00 to 19-DEC-09 21:00:00 (EST-5)
Reported by: Unknown

Snowfall amounts were estimated between 15 and 20 inches across the county.

Winter Storm in RAPPAHANNOCK, VIRGINIA
From 18-DEC-09 19:00:00 to 19-DEC-09 23:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall amounts were reported between 16 and 21 inches across the county.

Winter Storm in MADISON, VIRGINIA
From 18-DEC-09 17:00:00 to 19-DEC-09 21:00:00 (EST-5)
Reported by: Trained Spotter

Twenty one inches of snow fell at Haywood.