The northern and southern branches of the jet phased together, which resulted in coastal low pressure on the 13th. The coastal low tracked up the Mid-Atlantic Coast during the morning hours of the 14th before moving out to sea later in the day. High pressure over New England caused enough cold air for precipitation to start out as snow. However, warmer air did work its way in aloft causing precipitation to change to a period of sleet and rain across eastern areas. This cut down on some of the snow totals across these areas, but also caused ice accumulations.

Winter Weather in ANNE ARUNDEL, MARYLAND
From 13-MAR-17 19:00:00 to 14-MAR-17 12:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall totaled up to 2.5 inches near Georgetown and 2.2 inches at BWI Airport. Ice from freezing rain also totaled up to a tenth of an inch near Annapolis and a quarter of an inch near Georgetown. Average ice accumulations were between one and two tenths of an inch across the county.

Winter Weather in CENTRAL AND SOUTHEAST HOWARD, MARYLAND
From 13-MAR-17 19:00:00 to 14-MAR-17 12:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall totaled up to 2.8 inches near Oella and 2.4 inches near Elkridge.

Winter Weather in SOUTHERN BALTIMORE, MARYLAND
From 13-MAR-17 19:00:00 to 14-MAR-17 12:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall totaled up to 3.8 inces near  upper Falls and 2.5 inches near Catonsville. Snowfall averaged between 2 and 4 inches across southern Baltimore County.

Winter Weather in SOUTHEAST HARFORD, MARYLAND
From 13-MAR-17 19:00:00 to 14-MAR-17 12:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall totaled up to 2.5 inches near Havre De Grace.

Winter Weather in ST. MARY'S, MARYLAND
From 13-MAR-17 19:00:00 to 14-MAR-17 12:00:00 (EST-5)
Reported by: Trained Spotter

Ice accumulation from freezing rain was estimated to range from a trace to around one-tenth of an inch based on observations nearby.

Winter Storm in CENTRAL AND EASTERN ALLEGANY, MARYLAND
From 13-MAR-17 22:00:00 to 14-MAR-17 12:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall totaled up to 10.0 inches near Cumberland.

Winter Storm in NORTHWEST MONTGOMERY, MARYLAND
From 13-MAR-17 19:00:00 to 14-MAR-17 12:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall totaled up to 4.5 inches near Damascus.

Winter Storm in WASHINGTON, MARYLAND
From 13-MAR-17 22:00:00 to 14-MAR-17 12:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall totaled up to 9.5 inches near Pecktonville and 6.0 inches near Halfway. Snowfall also totaled up to 6.0 inches in Hagerstown.

Winter Weather in CALVERT, MARYLAND
From 13-MAR-17 19:00:00 to 14-MAR-17 12:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall was estimated to be between one and two inches across the county and ice accumulation was estimated to be between one and two tenths of an inch based on observations nearby.

Winter Storm in CARROLL, MARYLAND
From 13-MAR-17 19:00:00 to 14-MAR-17 12:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall totaled up to 8.0 inches near Westminster and Lineboro.

Winter Weather in CENTRAL AND SOUTHEAST MONTGOMERY, MARYLAND
From 13-MAR-17 19:00:00 to 14-MAR-17 12:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall totaled up to 3.0 inches near Rockville and 2.7 inches near Wheaton. Ice accumulation of five hundredths of an inch was reported near Takoma Park.

Winter Weather in CHARLES, MARYLAND
From 13-MAR-17 19:00:00 to 14-MAR-17 12:00:00 (EST-5)
Reported by: Trained Spotter

Ice accumulated to two tenths of an inch near Wicomico and twelve hundredths of an inch near Bryantown.

Winter Weather in NORTHWEST HARFORD, MARYLAND
From 13-MAR-17 19:00:00 to 14-MAR-17 12:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall totaled up to 4.0 inches in Whiteford.

Winter Weather in PRINCE GEORGES, MARYLAND
From 13-MAR-17 19:00:00 to 14-MAR-17 12:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall totaled up to 2.6 inches near Adelphi and 2.3 inches near College Park.

Winter Storm in FREDERICK, MARYLAND
From 13-MAR-17 19:00:00 to 14-MAR-17 12:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall totaled up to 11.0 inches near Sabillasville and 10.0 inches near Thurmont.

Winter Storm in EXTREME WESTERN ALLEGANY, MARYLAND
From 13-MAR-17 22:00:00 to 14-MAR-17 12:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall totaled up to 9.5 inches at Eckhart Mines and 9.0 inches near Mount Savage.

Winter Storm in NORTHERN BALTIMORE, MARYLAND
From 13-MAR-17 19:00:00 to 14-MAR-17 12:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall totaled up to 7.0 inches near Reisterstown and 5.9 inches near Glyndon.

Winter Storm in NORTHWEST HOWARD, MARYLAND
From 13-MAR-17 19:00:00 to 14-MAR-17 12:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall totaled up to 5.8 inches near Simpsonville and 4.5 inches near Columbia.