A ridge of high pressure was in place over the northeastern United States in the early morning hours of February 17th. At the same time, low pressure was tracking northeastward from the lower Mississippi Valley. By the afternoon the area of low pressure had progressed into the Ohio Valley with warm air advection occurring aloft over the Mid-Atlantic states, while cold surface temperatures remained. This led to areas of freezing rain and sleet during the afternoon and evening hours of the 17th for locations in Maryland near and north and west of the Baltimore metropolitan area. Ice accumulations were light and around a tenth of an inch or less. Precipitation then changed to rain during the overnight hours.

Winter Weather in NORTHERN BALTIMORE, MARYLAND
From 17-FEB-19 16:00:00 to 17-FEB-19 23:59:00 (EST-5)
Reported by: Trained Spotter

Trace amounts of ice were observed across northern Baltimore County.

Winter Weather in CENTRAL AND SOUTHEAST MONTGOMERY, MARYLAND
From 17-FEB-19 16:00:00 to 17-FEB-19 23:59:00 (EST-5)
Reported by: Trained Spotter

Trace amounts of ice were observed across central and southeast Montgomery County.

Winter Weather in CENTRAL AND SOUTHEAST HOWARD, MARYLAND
From 17-FEB-19 16:00:00 to 17-FEB-19 23:59:00 (EST-5)
Reported by: Trained Spotter

Trace amounts of ice were observed across central and southeast Howard County.

Winter Weather in ANNE ARUNDEL, MARYLAND
From 17-FEB-19 16:00:00 to 17-FEB-19 23:59:00 (EST-5)
Reported by: Trained Spotter

Trace amounts of ice were observed across Anne Arundel County.

Winter Weather in SOUTHERN BALTIMORE, MARYLAND
From 17-FEB-19 16:00:00 to 17-FEB-19 23:59:00 (EST-5)
Reported by: Trained Spotter

Trace amounts of ice were observed across southern Baltimore County.

Winter Weather in PRINCE GEORGES, MARYLAND
From 17-FEB-19 16:00:00 to 17-FEB-19 23:59:00 (EST-5)
Reported by: Trained Spotter

Trace amounts of ice were observed across Prince Georges County.

Winter Weather in SOUTHEAST HARFORD, MARYLAND
From 17-FEB-19 16:00:00 to 17-FEB-19 23:59:00 (EST-5)
Reported by: Trained Spotter

Trace amounts of ice were observed across southeast Harford County.

Winter Weather in EXTREME WESTERN ALLEGANY, MARYLAND
From 17-FEB-19 16:00:00 to 17-FEB-19 23:59:00 (EST-5)
Reported by: Trained Spotter

Ice accumulations of around a tenth of an inch were observed across western Allegany County.

Winter Weather in CENTRAL AND EASTERN ALLEGANY, MARYLAND
From 17-FEB-19 16:00:00 to 17-FEB-19 23:59:00 (EST-5)
Reported by: Trained Spotter

Ice accumulations of around a tenth of an inch were observed across central and eastern Allegany County.

Winter Weather in WASHINGTON, MARYLAND
From 17-FEB-19 16:00:00 to 17-FEB-19 23:59:00 (EST-5)
Reported by: Trained Spotter

Ice accumulations of a few hundredths to up to a tenth of an inch were observed across Washington County.

Winter Weather in FREDERICK, MARYLAND
From 17-FEB-19 16:00:00 to 17-FEB-19 23:59:00 (EST-5)
Reported by: Trained Spotter

Ice accumulations of a few hundredths to up to a tenth of an inch were observed across Frederick County.

Winter Weather in CARROLL, MARYLAND
From 17-FEB-19 16:00:00 to 17-FEB-19 23:59:00 (EST-5)
Reported by: Trained Spotter

Ice accumulations of a few hundredths of an inch were observed across Carroll County.

Winter Weather in NORTHWEST MONTGOMERY, MARYLAND
From 17-FEB-19 16:00:00 to 17-FEB-19 23:59:00 (EST-5)
Reported by: Trained Spotter

Trace amounts of ice were observed across northwest Montgomery County.

Winter Weather in NORTHWEST HOWARD, MARYLAND
From 17-FEB-19 16:00:00 to 17-FEB-19 23:59:00 (EST-5)
Reported by: Trained Spotter

Trace amounts of ice were observed across northwest Howard County.

Winter Weather in NORTHWEST HARFORD, MARYLAND
From 17-FEB-19 16:00:00 to 17-FEB-19 23:59:00 (EST-5)
Reported by: Trained Spotter

Trace amounts of ice were observed across northwest Harford County.