Warm and moist air overran an arctic air mass that was in place. This resulted in a period of freezing rain that caused hazardous conditions.

Winter Weather in SOUTHEAST HARFORD, MARYLAND
From 17-DEC-16 04:00:00 to 17-DEC-16 11:00:00 (EST-5)
Reported by: Mesonet

A glaze of ice was estimated based on observations nearby.

Winter Weather in SOUTHERN BALTIMORE, MARYLAND
From 17-DEC-16 04:00:00 to 17-DEC-16 12:00:00 (EST-5)
Reported by: Broadcast Media

Icy roads on Interstate 95 resulted in a 55-car accident that lead to 12 injuries and 2 fatalities.

Winter Weather in CHARLES, MARYLAND
From 17-DEC-16 04:00:00 to 17-DEC-16 11:00:00 (EST-5)
Reported by: Trained Spotter

Ice totaled up to one-tenth of an inch near La Plata.

Winter Weather in CALVERT, MARYLAND
From 17-DEC-16 04:00:00 to 17-DEC-16 11:00:00 (EST-5)
Reported by: Trained Spotter

Ice totaled up to thirteen hundredths of an inch near Huntingtown.

Winter Weather in ST. MARY'S, MARYLAND
From 17-DEC-16 04:00:00 to 17-DEC-16 11:00:00 (EST-5)
Reported by: Mesonet

A glaze of ice was estimated based on observations nearby.

Winter Storm in WASHINGTON, MARYLAND
From 17-DEC-16 03:00:00 to 17-DEC-16 12:00:00 (EST-5)
Reported by: Unknown

Ice accumulation around a quarter inch was estimated based on observations nearby.

Winter Storm in EXTREME WESTERN ALLEGANY, MARYLAND
From 17-DEC-16 03:00:00 to 17-DEC-16 12:00:00 (EST-5)
Reported by: Trained Spotter

A quarter inch of ice was reported near Ridgeley.

Winter Storm in CENTRAL AND EASTERN ALLEGANY, MARYLAND
From 17-DEC-16 03:00:00 to 17-DEC-16 12:00:00 (EST-5)
Reported by: Unknown

A quarter inch of ice was estimated based on observations nearby.

Winter Storm in FREDERICK, MARYLAND
From 17-DEC-16 03:00:00 to 17-DEC-16 12:00:00 (EST-5)
Reported by: Unknown

A quarter inch of ice was estimated based on observations nearby.

Winter Storm in CARROLL, MARYLAND
From 17-DEC-16 03:00:00 to 17-DEC-16 12:00:00 (EST-5)
Reported by: Unknown

A quarter inch of ice was estimated based on observations nearby.

Winter Storm in NORTHERN BALTIMORE, MARYLAND
From 17-DEC-16 03:00:00 to 17-DEC-16 12:00:00 (EST-5)
Reported by: Unknown

A quarter inch of ice was estimated based on observations nearby.

Winter Weather in PRINCE GEORGES, MARYLAND
From 17-DEC-16 04:00:00 to 17-DEC-16 12:00:00 (EST-5)
Reported by: Mesonet

A glaze of ice was estimated based on observations nearby.

Winter Weather in ANNE ARUNDEL, MARYLAND
From 17-DEC-16 04:00:00 to 17-DEC-16 12:00:00 (EST-5)
Reported by: Mesonet

A glaze of ice was estimated based on observations nearby.

Winter Weather in NORTHWEST MONTGOMERY, MARYLAND
From 17-DEC-16 04:00:00 to 17-DEC-16 11:00:00 (EST-5)
Reported by: Trained Spotter

Ice accumulations between one and two tenths were reported across northwest Montgomery County.

Winter Weather in CENTRAL AND SOUTHEAST MONTGOMERY, MARYLAND
From 17-DEC-16 04:00:00 to 17-DEC-16 11:00:00 (EST-5)
Reported by: Trained Spotter

Ice accumulations around one-tenth of an inch were reported across southeast Montgomery County.

Winter Weather in CENTRAL AND SOUTHEAST HOWARD, MARYLAND
From 17-DEC-16 04:00:00 to 17-DEC-16 11:00:00 (EST-5)
Reported by: Trained Spotter

Ice accumulations of twelve hundredths of an inch were reported near Glenmont.

Winter Weather in NORTHWEST HOWARD, MARYLAND
From 17-DEC-16 04:00:00 to 17-DEC-16 11:00:00 (EST-5)
Reported by: Mesonet

A glaze of ice was estimated based on observations nearby.

Winter Storm in NORTHWEST HARFORD, MARYLAND
From 17-DEC-16 03:00:00 to 17-DEC-16 12:00:00 (EST-5)
Reported by: Trained Spotter

A quarter inch of ice was reported in Bel Air.