An area of low pressure developed across the southeastern United States on the night of November 14th, and tracked northeastward along the North and South Carolina coastlines during the daytime hours on the 15th, strengthening to around 995mb on the night of the 15th as it continued moving northward through the Delmarva to New Jersey by the morning of the 16th. Further strengthening to around 985 mb occurred on the 16th as the system sped up and moved towards Nova Scotia. Widespread precipitation was brought to the region, including heavy snow and mixed precipitation northwest of the I-95 corridor, and mainly rain in southern Maryland.

Winter Weather in ANNE ARUNDEL, MARYLAND
From 15-NOV-18 07:00:00 to 15-NOV-18 15:00:00 (EST-5)
Reported by: Trained Spotter

Widespread snowfall amounts of 1 to 2 inches occurred, with highest measured report of 1.7 inches at Baltimore Washington International Airport.

Winter Storm in CARROLL, MARYLAND
From 15-NOV-18 07:00:00 to 16-NOV-18 00:00:00 (EST-5)
Reported by: Trained Spotter

Widespread snowfall amounts of 4 to 8 inches occurred, with a local maximum of 7.5 inches measured near Taneytown. Some ice accretion of up to a tenth of an inch of ice also occurred.

Winter Storm in NORTHERN BALTIMORE, MARYLAND
From 15-NOV-18 07:00:00 to 16-NOV-18 00:00:00 (EST-5)
Reported by: Trained Spotter

Widespread snowfall amounts of 4 to 6 inches occurred, with a local maximum of 5.6 inches measured near Reistertown. Some ice accretion of up to a tenth of an inch of ice also occurred.

Winter Storm in NORTHWEST HARFORD, MARYLAND
From 15-NOV-18 07:00:00 to 16-NOV-18 00:00:00 (EST-5)
Reported by: Trained Spotter

Widespread snowfall amounts of 4 to 7 inches occurred, with a local maximum of 7.1 inches measured near Norrisville. Some ice accretion of up to a tenth of an inch of ice also occurred.

Winter Weather in SOUTHEAST HARFORD, MARYLAND
From 15-NOV-18 07:00:00 to 15-NOV-18 15:00:00 (EST-5)
Reported by: Trained Spotter

Widespread snowfall amounts of 2 to 4 inches occurred. Some ice accretion of up to a few hundredths of an inch also occurred.

Winter Weather in SOUTHERN BALTIMORE, MARYLAND
From 15-NOV-18 07:00:00 to 15-NOV-18 15:00:00 (EST-5)
Reported by: Trained Spotter

Widespread snowfall amounts of 2 to 4 inches occurred. Some ice accretion of up to a few hundredths of an inch also occurred.

Winter Weather in CENTRAL AND SOUTHEAST HOWARD, MARYLAND
From 15-NOV-18 07:00:00 to 15-NOV-18 15:00:00 (EST-5)
Reported by: Trained Spotter

Widespread snowfall amounts of 2 to 3 inches occurred. Some ice accretion of up to a few hundredths of an inch also occurred.

Winter Storm in EXTREME WESTERN ALLEGANY, MARYLAND
From 15-NOV-18 05:00:00 to 16-NOV-18 00:00:00 (EST-5)
Reported by: Trained Spotter

Widespread snowfall amounts of 7 to 10 inches occurred, with a local maximum of 10.5 inches measured near Frostburg. Some ice accretion of up to a tenth of an inch also occurred.

Winter Storm in CENTRAL AND EASTERN ALLEGANY, MARYLAND
From 15-NOV-18 05:00:00 to 16-NOV-18 00:00:00 (EST-5)
Reported by: Trained Spotter

Widespread snowfall amounts of 7 to 10 inches occurred, with a local maximum of 10 inches measured near Cumberland. Some ice accretion of up to a tenth of an inch also occurred.

Winter Storm in NORTHWEST MONTGOMERY, MARYLAND
From 15-NOV-18 05:00:00 to 16-NOV-18 00:00:00 (EST-5)
Reported by: Trained Spotter

Widespread snowfall amounts of 4 to 5 inches occurred, with a local maximum of 5.2 inches measured near Clarksburg. Some ice accretion of up to a tenth of an inch of ice also occurred.

Winter Storm in NORTHWEST HOWARD, MARYLAND
From 15-NOV-18 07:00:00 to 16-NOV-18 00:00:00 (EST-5)
Reported by: Trained Spotter

Widespread snowfall amounts of 4 to 5 inches occurred. Some ice accretion of up to a tenth of an inch of ice also occurred.

Winter Weather in CENTRAL AND SOUTHEAST MONTGOMERY, MARYLAND
From 15-NOV-18 05:00:00 to 15-NOV-18 15:00:00 (EST-5)
Reported by: Trained Spotter

Widespread snowfall amounts of 2 to 3 inches occurred, with a light glaze of ice accrual also reported.

Winter Weather in PRINCE GEORGES, MARYLAND
From 15-NOV-18 05:00:00 to 15-NOV-18 15:00:00 (EST-5)
Reported by: Trained Spotter

Widespread snowfall amounts of 1 to 1.5 inches occurred across the county.

Winter Storm in WASHINGTON, MARYLAND
From 15-NOV-18 05:00:00 to 16-NOV-18 00:00:00 (EST-5)
Reported by: Trained Spotter

Widespread snowfall amounts of 5 to 8 inches occurred, with a local maximum of 7.5 inches measured near Pecktonville. Some ice accretion of up to a tenth of an inch also occurred.

Winter Storm in FREDERICK, MARYLAND
From 15-NOV-18 05:00:00 to 16-NOV-18 00:00:00 (EST-5)
Reported by: Trained Spotter

Widespread snowfall amounts of 5 to 8 inches occurred, with a local maximum of 9 inches measured in the higher elevations near Sabillasville. Some ice accretion of up to two tenths of an inch of ice also occurred.