An upper-level low passed through the Mid-Atlantic triggering snow on the 30th. The heaviest snow fell during the late morning and afternoon hours.
Every event with a place to put it; 12 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS LWX wrote it up.
An upper-level low passed through the Mid-Atlantic triggering snow on the 30th. The heaviest snow fell during the late morning and afternoon hours.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Baltimore/Washington wrote its last area forecast discussion before the first event at Jan 30, 6:58 AM EST, 2 minutes earlier.
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</html>The national radar mosaic for the moment the first event began.
12 winter storm, 3 winter weather. Local standard time, as filed.
Snow amounts around eight to twelve inches were received throughout the county.
Snow amounts around five to nine inches were received throughout the county.
Six inches of snow fell in Frostburg.
Snow reports between five and six inches were received throughout the county.
Snow amounts around five inches were reported throughout the county.
Snow amounts around five to eight inches were received throughout southern Baltimore County.
Snow amounts around five to six inches were received throughout Harford County.
Snow amounts around five to seven inches were received throughout the county.
Snow amounts around five to seven inches were received throughout the county.
Snow amounts around five to seven inches were received throughout the county.
Snow amounts around five to eight inches were received throughout the county.
Snow amounts around seven to nine inches were received throughout the county.
Snowfall amounts between two and four inches were received throughout the county.
Snowfall amounts between two and four inches were received throughout central and eastern portions of the county.
Snowfall amounts averaged between two and four inches across the county.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Maryland in 2010Every state in 2010This day in weather historyWarnings in Maryland, January 2010
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-10-01. Each event’s entry at NCEI: 208035, 208036, 208025, 208026, 208027, 208028, 208029, 208030, 208031, 208032, 208033, 208034, 209656, 209657, 209658.