A cold front crossed the Mid-Atlantic on the night of January 16th with high pressure building in across the northeastern United States. A wave of low pressure developing near the St. Louis area then moved eastward along the frontal boundary during the daytime hours of the 17th and into the eastern Great Lakes overnight. The combination of the cold air provided by the high pressure area to the north and the moisture and lift associated with the low pressure system generated widespread accumulating snow from late afternoon on January 17th and persisting through the first half of the night until precipitation ended and temperatures rose to near or above freezing.

Winter Weather in WASHINGTON, MARYLAND
From 17-JAN-19 15:00:00 to 18-JAN-19 02:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall amounts of 1 to 2 inches were observed across Washington County, with 1.6 inches being reported near Hagerstown.

Winter Weather in PRINCE GEORGES, MARYLAND
From 17-JAN-19 16:00:00 to 18-JAN-19 02:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall amounts of 1 to 2 inches were observed across Prince Georges County, with 1.9 inches being reported near Beltsville.

Winter Weather in CENTRAL AND SOUTHEAST MONTGOMERY, MARYLAND
From 17-JAN-19 16:00:00 to 18-JAN-19 02:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall amounts of 1 to 2 inches were observed across central and southeast Montgomery County, with 2.1 inches being reported near White Oak.

Winter Weather in NORTHWEST MONTGOMERY, MARYLAND
From 17-JAN-19 16:00:00 to 18-JAN-19 02:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall amounts of 1 to 2 inches were observed across northwest Montgomery County, with 1.6 inches being reported near Clarksburg.

Winter Weather in FREDERICK, MARYLAND
From 17-JAN-19 16:00:00 to 18-JAN-19 02:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall amounts of 1 to 2 inches were observed across Frederick County, with 1.8 inches being reported near Thurmont.

Winter Weather in CENTRAL AND SOUTHEAST HOWARD, MARYLAND
From 17-JAN-19 18:00:00 to 18-JAN-19 02:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall amounts of 1 to 2 inches were observed across central and southeast Harford County, with 2.0 inches being reported near Bel Air.

Winter Weather in CARROLL, MARYLAND
From 17-JAN-19 16:00:00 to 18-JAN-19 02:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall amounts of 1 to 2 inches were observed across Carroll County, with 1.8 inches being reported near Westminster.

Winter Weather in NORTHWEST HOWARD, MARYLAND
From 17-JAN-19 16:00:00 to 18-JAN-19 02:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall amounts of 1 to 2 inches were observed across northwest Howard County, with 1.5 inches being reported near Gaither.

Winter Weather in ANNE ARUNDEL, MARYLAND
From 17-JAN-19 18:00:00 to 18-JAN-19 02:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall amounts of 1 to 2 inches were observed across Anne Arundel County, with 1.7 inches being reported near Fort Meade.

Winter Weather in NORTHERN BALTIMORE, MARYLAND
From 17-JAN-19 18:00:00 to 18-JAN-19 02:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall amounts of 1 to 1.5 inches were observed across northern Baltimore County, with 1 inch being reported near Bentley Springs.

Winter Weather in CENTRAL AND SOUTHEAST HOWARD, MARYLAND
From 17-JAN-19 16:00:00 to 18-JAN-19 02:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall amounts of 1 to 2 inches were observed across central and southeast Howard County, with 2.1 inches being reported near Simpsonville.

Winter Weather in SOUTHERN BALTIMORE, MARYLAND
From 17-JAN-19 18:00:00 to 18-JAN-19 02:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall amounts of 1 to 1.5 inches were observed across southern Baltimore County, with 1.3 inches being reported near Pikesville.

Winter Weather in NORTHWEST HARFORD, MARYLAND
From 17-JAN-19 18:00:00 to 18-JAN-19 02:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall amounts of 1 to 2 inches were observed across northwest Harford County, with 1.9 inches being reported near Norrisville.