Low pressure passed through the region in a zonal flow causing precipitation to develop on the 16th. There was plenty of cold air in place ahead of this system causing precipitation to fall in the form of snow.

Winter Weather in FREDERICK, MARYLAND
From 16-DEC-10 10:00:00 to 16-DEC-10 18:00:00 (EST-5)
Reported by: Trained Spotter

Two inches of snow was reported at at Kingsbrook.

Winter Weather in MONTGOMERY, MARYLAND
From 16-DEC-10 10:00:00 to 16-DEC-10 18:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall amounts between one and two inches were reported across the county.

Winter Weather in CARROLL, MARYLAND
From 16-DEC-10 10:00:00 to 16-DEC-10 18:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall totaled up to 1.5 inches in Sykesville. One inch of snow fell at Buckhorn Run and Westminster.

Winter Weather in HOWARD, MARYLAND
From 16-DEC-10 10:00:00 to 16-DEC-10 18:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall amounts between one and two inches were reported across the county.

Winter Weather in NORTHERN BALTIMORE, MARYLAND
From 16-DEC-10 10:00:00 to 16-DEC-10 18:00:00 (EST-5)
Reported by: Unknown

Snowfall amounts were estimated around one inch across northern Baltimore County.

Winter Weather in SOUTHERN BALTIMORE, MARYLAND
From 16-DEC-10 10:00:00 to 16-DEC-10 18:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall totaled up to 2.0 inches in Essex. Snowfall amounts between one and two inches were reported across southern Baltimore County.

Winter Weather in ANNE ARUNDEL, MARYLAND
From 16-DEC-10 10:00:00 to 16-DEC-10 18:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall totaled up to 1.5 inches at Lake Riviera. A snowfall total of 1.2 inches was reported at BWI airport.

Winter Weather in PRINCE GEORGES, MARYLAND
From 16-DEC-10 10:00:00 to 16-DEC-10 18:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall totaled up to 1.3 inches near Forest Heights and 1.0 inch at College Park.

Winter Weather in EXTREME WESTERN ALLEGANY, MARYLAND
From 16-DEC-10 10:00:00 to 16-DEC-10 18:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall totaled up to 2.5 inches at Eckhart Mines and Frostburg.

Winter Weather in WASHINGTON, MARYLAND
From 16-DEC-10 10:00:00 to 16-DEC-10 18:00:00 (EST-5)
Reported by: Unknown

Snowfall was estimated around two inches across eastern Washington County.

Winter Weather in CHARLES, MARYLAND
From 16-DEC-10 10:00:00 to 16-DEC-10 18:00:00 (EST-5)
Reported by: Trained Spotter

A report of 2.0 inches of snow was received from St. Charles. Snowfall totaled up to 1.8 inches at Waldorf and 1.5 inches at Dentsville.

Winter Weather in CALVERT, MARYLAND
From 16-DEC-10 10:00:00 to 16-DEC-10 18:00:00 (EST-5)
Reported by: Unknown

Snowfall was estimated around one to two inches across Calvert County.

Winter Weather in ST. MARY'S, MARYLAND
From 16-DEC-10 10:00:00 to 16-DEC-10 18:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall totaled up to 2.0 inches at Wildewood. Snowfall amounts between one and two inches were received across the rest of the county.

Winter Weather in CENTRAL AND EASTERN ALLEGANY, MARYLAND
From 16-DEC-10 10:00:00 to 16-DEC-10 18:00:00 (EST-5)
Reported by: Unknown

Snowfall was estimated around two inches across eastern Allegany County.