A low pressure system developed across the south central United States during the daylight hours of January 12th as high pressure was positioned over the northeastern United States and southeastern Canada. The low pressure system then tracked into the southeastern United States during the overnight hours of January 12th and moved northeastward offshore near the Outer Banks of North Carolina through the day of January 13th. Widespread accumulating snow affected the state of Maryland, with the highest totals south and west of Baltimore.

Winter Storm in WASHINGTON, MARYLAND
From 12-JAN-19 17:00:00 to 13-JAN-19 23:59:00 (EST-5)
Reported by: Trained Spotter

Snowfall amounts of 5 to 9 inches were observed across Washington County, with a maximum of 8.9 inches measured near Keedysville.

Winter Storm in EXTREME WESTERN ALLEGANY, MARYLAND
From 12-JAN-19 15:00:00 to 13-JAN-19 23:59:00 (EST-5)
Reported by: Trained Spotter

Snowfall amounts of 4 to 6 inches were observed across the western portions of Allegany County, with 5.5 inches being reported near Frostburg.

Winter Storm in CENTRAL AND EASTERN ALLEGANY, MARYLAND
From 12-JAN-19 15:00:00 to 13-JAN-19 23:59:00 (EST-5)
Reported by: Trained Spotter

Snowfall amounts of 4 to 6 inches were observed across the central and eastern portions of Allegany County, with a localized maximum of 6.5 inches measured near Ridgeley.

Winter Storm in FREDERICK, MARYLAND
From 12-JAN-19 17:00:00 to 13-JAN-19 23:59:00 (EST-5)
Reported by: Trained Spotter

Snowfall amounts of 5 to 10 inches were observed across Frederick County, with a localized maximum of 10.9 inches measured near Point of Rocks.

Winter Storm in CARROLL, MARYLAND
From 12-JAN-19 17:00:00 to 13-JAN-19 23:59:00 (EST-5)
Reported by: Trained Spotter

Snowfall amounts of 5 to 7 inches were observed across Frederick County, with a maximum of 7.0 inches measured near Mount Airy.

Winter Storm in CHARLES, MARYLAND
From 12-JAN-19 15:00:00 to 13-JAN-19 23:59:00 (EST-5)
Reported by: Trained Spotter

Snowfall amounts of 6 to 9 inches were observed across Charles County, with a maximum of 8.7 inches measured near Waldorf.

Winter Storm in CALVERT, MARYLAND
From 12-JAN-19 17:00:00 to 14-JAN-19 02:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall amounts of 7 to 11 inches were observed across Calvert County, with a maximum of 11.0 inches measured near Dunkirk.

Winter Storm in NORTHWEST MONTGOMERY, MARYLAND
From 12-JAN-19 17:00:00 to 13-JAN-19 23:59:00 (EST-5)
Reported by: Trained Spotter

Snowfall amounts of 10 to 13 inches were observed across northwest Montgomery County, with a maximum of 13.2 inches measured near Clarksburg.

Winter Storm in NORTHWEST HOWARD, MARYLAND
From 12-JAN-19 17:00:00 to 13-JAN-19 23:59:00 (EST-5)
Reported by: Trained Spotter

Snowfall amounts of 6 to 10 inches were observed across northwest Howard County.

Winter Storm in CENTRAL AND SOUTHEAST HOWARD, MARYLAND
From 12-JAN-19 17:00:00 to 13-JAN-19 23:59:00 (EST-5)
Reported by: Trained Spotter

Snowfall amounts of 9 to 13 inches were observed across central and southeast Howard County, with a maximum of 13.0 inches measured near Howard.

Winter Weather in NORTHERN BALTIMORE, MARYLAND
From 12-JAN-19 17:00:00 to 12-JAN-19 23:59:00 (EST-5)
Reported by: Trained Spotter

Snowfall amounts of 4 to 5 inches were observed across northern Baltimore County, with a maximum of 4.7 inches measured near Glyndon.

Winter Weather in NORTHWEST HARFORD, MARYLAND
From 12-JAN-19 17:00:00 to 12-JAN-19 23:59:00 (EST-5)
Reported by: Trained Spotter

Snowfall amounts of 4 to 5 inches were observed across northwest Harford County, with a maximum of 4.3 inches measured near Norrisville.

Winter Weather in SOUTHEAST HARFORD, MARYLAND
From 12-JAN-19 17:00:00 to 12-JAN-19 23:59:00 (EST-5)
Reported by: Trained Spotter

Snowfall amounts of 3 to 4 inches were observed across southeast Harford County, with a maximum of 4 inches measured near Bel Air.

Winter Storm in ANNE ARUNDEL, MARYLAND
From 12-JAN-19 17:00:00 to 13-JAN-19 23:59:00 (EST-5)
Reported by: Trained Spotter

Snowfall amounts of 7 to 12 inches were observed across Anne Arundel County, with a maximum of 11.9 inches measured near Chelsea Beach.

Winter Storm in PRINCE GEORGES, MARYLAND
From 12-JAN-19 17:00:00 to 13-JAN-19 23:59:00 (EST-5)
Reported by: Trained Spotter

Snowfall amounts of 8 to 12 inches were observed across Prince Georges County, with a maximum of 11.5 inches measured near Baden.

Winter Storm in SOUTHERN BALTIMORE, MARYLAND
From 12-JAN-19 17:00:00 to 13-JAN-19 23:59:00 (EST-5)
Reported by: Trained Spotter

Snowfall amounts of 5 to 9 inches were observed across southern Baltimore County, with a maximum of 9.3 inches measured near Towson.

Winter Storm in ST. MARY'S, MARYLAND
From 12-JAN-19 17:00:00 to 14-JAN-19 02:00:00 (EST-5)
Reported by: Trained Spotter

Snowfall amounts of 7 to 10 inches were observed across Saint Mary's County, with a maximum of 9.7 inches measured near Callaway.

Winter Storm in CENTRAL AND SOUTHEAST MONTGOMERY, MARYLAND
From 12-JAN-19 17:00:00 to 13-JAN-19 23:59:00 (EST-5)
Reported by: Trained Spotter

Snowfall amounts of 9 to 13 inches were observed across central and southeast Montgomery County, with a maximum of 13.1 inches measured near Glenmont.