Low pressure over the Ohio Valley caused periods of precipitation during the first into the morning hours of the second. There was enough low-level cold air for a period of wintry precipitation before enough warm air eventually worked its way into the storm causing precipitation to change to rain.

Winter Weather in WASHINGTON, MARYLAND
From 01-FEB-11 00:00:00 to 01-FEB-11 10:00:00 (EST-5)
Reported by: Trained Spotter

A glaze of ice was reported at Funkstown.

Winter Weather in HARFORD, MARYLAND
From 01-FEB-11 02:00:00 to 01-FEB-11 10:00:00 (EST-5)
Reported by: Trained Spotter

A coating of ice was reported on all surfaces at Kingsville. Icing was reported on trees at Pleasant Hills.

Winter Weather in EXTREME WESTERN ALLEGANY, MARYLAND
From 01-FEB-11 20:00:00 to 02-FEB-11 03:00:00 (EST-5)
Reported by: Trained Spotter

Ice accumulated to around one tenth of an inch at Frostburg.

Winter Weather in CENTRAL AND EASTERN ALLEGANY, MARYLAND
From 01-FEB-11 20:00:00 to 02-FEB-11 03:00:00 (EST-5)
Reported by: Unknown

A trace of ice accumulation from freezing rain was estimated across central and eastern Allegany County.

Winter Weather in WASHINGTON, MARYLAND
From 01-FEB-11 20:00:00 to 02-FEB-11 03:00:00 (EST-5)
Reported by: Trained Spotter

Light ice accumulations were reported across Washington County.

Winter Weather in FREDERICK, MARYLAND
From 01-FEB-11 21:00:00 to 02-FEB-11 06:00:00 (EST-5)
Reported by: CoCoRaHS

Ice accumulation was estimated around one tenth of an inch due to freezing rain near Wolfsville.

Winter Weather in CARROLL, MARYLAND
From 01-FEB-11 21:00:00 to 02-FEB-11 06:00:00 (EST-5)
Reported by: Trained Spotter

A glaze of ice was reported on trees and driveways near Millers.

Winter Weather in MONTGOMERY, MARYLAND
From 01-FEB-11 21:00:00 to 02-FEB-11 06:00:00 (EST-5)
Reported by: Broadcast Media

Minor icing was reported in Laytonsville.

Winter Weather in SOUTHERN BALTIMORE, MARYLAND
From 01-FEB-11 21:00:00 to 02-FEB-11 06:00:00 (EST-5)
Reported by: Broadcast Media

A couple hundredths of an inch of ice was reported near Oella.

Winter Weather in NORTHERN BALTIMORE, MARYLAND
From 01-FEB-11 21:00:00 to 02-FEB-11 06:00:00 (EST-5)
Reported by: Trained Spotter

Ice accumulation up to one tenth of an inch was reported at Parkton.

Winter Weather in HOWARD, MARYLAND
From 01-FEB-11 21:00:00 to 02-FEB-11 06:00:00 (EST-5)
Reported by: Unknown

A glaze of ice accumulation from freezing rain was reported across the county.

Winter Weather in HARFORD, MARYLAND
From 01-FEB-11 21:00:00 to 02-FEB-11 06:00:00 (EST-5)
Reported by: Trained Spotter

A glaze of ice was reported on cars near Whiteford.

Winter Weather in EXTREME WESTERN ALLEGANY, MARYLAND
From 01-FEB-11 00:00:00 to 01-FEB-11 10:00:00 (EST-5)
Reported by: Trained Spotter

Ice accumulation from freezing rain was around one tenth of an inch at Eckhart Mines.

Winter Weather in MONTGOMERY, MARYLAND
From 01-FEB-11 02:00:00 to 01-FEB-11 10:00:00 (EST-5)
Reported by: Trained Spotter

A trace of ice was reported near Damascus.

Winter Weather in NORTHERN BALTIMORE, MARYLAND
From 01-FEB-11 02:00:00 to 01-FEB-11 10:00:00 (EST-5)
Reported by: Trained Spotter

A glaze of ice was reported at Jacksonville.

Winter Weather in SOUTHERN BALTIMORE, MARYLAND
From 01-FEB-11 02:00:00 to 01-FEB-11 10:00:00 (EST-5)
Reported by: Trained Spotter

A glaze of ice was reported at Kingsville, Catonsville, Towson, and Baltimore City.

Winter Weather in ANNE ARUNDEL, MARYLAND
From 01-FEB-11 02:00:00 to 01-FEB-11 10:00:00 (EST-5)
Reported by: Trained Spotter

Ice accumulation from freezing rain was reported around five hundredths of an inch near Lothian.

Winter Weather in PRINCE GEORGES, MARYLAND
From 01-FEB-11 02:00:00 to 01-FEB-11 10:00:00 (EST-5)
Reported by: Trained Spotter

A trace of ice accumulation from freezing rain was reported at Oxon Hill and Camp Springs.

Winter Weather in CHARLES, MARYLAND
From 01-FEB-11 05:00:00 to 01-FEB-11 10:00:00 (EST-5)
Reported by: Trained Spotter

A trace of ice accumulation from freezing rain was reported at Bryans Road.

Winter Weather in CALVERT, MARYLAND
From 01-FEB-11 05:00:00 to 01-FEB-11 10:00:00 (EST-5)
Reported by: Trained Spotter

A trace of ice accumulation from freezing rain was reported at Chesapeake Beach.

Winter Weather in ST. MARY'S, MARYLAND
From 01-FEB-11 05:00:00 to 01-FEB-11 10:00:00 (EST-5)
Reported by: Trained Spotter

A glaze of ice was reported at Hollywood and Park Hall. Ice accumulated up to five hundredths of an inch at Ridge.

Winter Weather in FREDERICK, MARYLAND
From 01-FEB-11 02:00:00 to 01-FEB-11 10:00:00 (EST-5)
Reported by: Trained Spotter

A glaze of ice was reported on many roads across Frederick County.

Winter Weather in CARROLL, MARYLAND
From 01-FEB-11 02:00:00 to 01-FEB-11 10:00:00 (EST-5)
Reported by: Trained Spotter

A glaze of ice was reported near Taneytown.

Winter Weather in HOWARD, MARYLAND
From 01-FEB-11 02:00:00 to 01-FEB-11 10:00:00 (EST-5)
Reported by: Trained Spotter

A glaze of ice was reported in Ellicott City.