A clipper system brought a period of snow to northern Maryland.
Every event with a place to put it; 2 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.
A clipper system brought a period of snow to northern Maryland.
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 Dec 30, 12:39 AM EST, 1 hour 21 minutes earlier.
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</html>Hazardous Weather Outlook National Weather Service Baltimore MD/Washington DC 638 PM EST Fri Dec 29 2017 ANZ530>543-DCZ001-MDZ011-013-014-016>018-508-VAZ052>057-301000- Chesapeake Bay north of Pooles Island MD- Chesapeake Bay from Pooles Island to Sandy Point MD- Chesapeake Bay from Sandy Point to North Beach MD- Chesapeake Bay from North Beach to Drum Point MD- Chesapeake Bay from Drum Point MD to Smith Point VA- Tidal Potomac from Key Bridge to Indian Head MD- Tidal Potomac from Indian Head to Cobb Island MD- Tidal Potomac from Cobb Island MD to Smith Point VA- Patapsco River including Baltimore Harbor- Chester River to Queenstown MD-Eastern Bay- Choptank River to Cambridge MD and the Little Choptank River- Patuxent River to Broomes Island MD- Tangier Sound and the inland waters surrounding Bloodsworth Island-District of Columbia-Southern Baltimore-Prince Georges- Anne Arundel-Charles-St. Marys-Calvert-Southeast Harford- Prince William/Manassas/Manassas Park-Fairfax- Arlington/Falls Church/Alexandria-Stafford-Spotsylvania- King George- 638 PM EST Fri Dec 29 2017 This Hazardous Weather Outlook is for the Maryland portion of the Chesapeake Bay, Tidal Potomac River, and adjacent counties in central Maryland and northern Virginia as well as the District of Columbia. .DAY ONE...Tonight A Winter Weather Advisory is in effect for northeastern Maryland...beginning at 3 am. Elsewhere...accumulating light snow is expected toward morning across the Washington and Baltimore Metropolitan areas. Plan on slippery roads toward morning. .DAYS TWO THROUGH SEVEN...Saturday through Thursday The Winter Weather Advisory for northeastern Maryland continues until noon. Elsewhere...accumulating light snow is expected through mid-morning Saturday across the Washington and Baltimore Metropolitan areas. Plan on slippery roads Saturday morning. Sub-zero wind chills which could cause hypothermia and frostbite are possible Sunday night into Monday morning. A Wind Chill Advisory may be required. .SPOTTER INFORMATION STATEMENT... Spotters should report snowfall observations per normal procedures. MDZ003>006-501>507-VAZ025>031-036>040-050-051-501>508-WVZ050>053- 055-501>506-301000- Washington-Frederick MD-Carroll-Northern Baltimore- Extreme Western Allegany-Central and Eastern Allegany- Northwest Montgomery-Central and Southeast Montgomery- Northwest Howard-Central and Southeast Howard-Northwest Harford- Augusta-Rockingham-Shenandoah-Frederick VA-Page-Warren-Clarke- Nelson-Albemarle-Greene-Madison-Rappahannock-Orange-Culpeper- Northern Fauquier-Southern Fauquier-Western Highland- Eastern Highland-Western Loudoun-Eastern Loudoun- Northern Virginia Blue Ridge-Central Virginia Blue Ridge- Hampshire-Morgan-Berkeley-Jefferson-Hardy-Western Grant- Eastern Grant-Western Mineral-Eastern Mineral-Western Pendleton- Eastern Pendleton- 638 PM EST Fri Dec 29 2017 This Hazardous Weather Outlook is for eastern West Virginia, northern and central Virginia, and central and western Maryland with the exception of Garrett County. .DAY ONE...Tonight A Winter Weather Advisory is in effect overnight for northern Maryland and portions of the eastern West Virginia. Elsewhere...accumulating light snow is expected overnight for northern and central Virginia as well as central Maryland and the Potomac Highlands of West Virginia. Plan on slippery roads overnight. .DAYS TWO THROUGH SEVEN...Saturday through Thursday A Winter Weather Advisory is in effect for northern Maryland and portions of the eastern West Virginia Panhandle until noon. A Winter Weather Advisory continues for locations along and west of the Allegheny Front in western Grant...western Mineral and western Allegany Counties until 2 pm. Elsewhere...accumulating light snow is expected through mid-morning across northern Virginia as well as central Maryland and the Potomac Highlands of West Virginia. Plan on slippery roads through Saturday morning. Sub-zero wind chills which could cause hypothermia and frostbite are possible Saturday night into Sunday over the higher elevations, and Sunday night into Monday morning across all areas. Wind Chill Advisories may be required. .SPOTTER INFORMATION STATEMENT... Spotters should report snowfall observations per normal procedures.
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</html>The national radar mosaic for the moment the first event began.
2 winter weather. Local standard time, as filed.
Snowfall totaled up to 2.1 inches near Thurmont.
Snowfall totaled up to 1.9 inches near Millers.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Maryland in 2017Every state in 2017This day in weather historyWarnings in Maryland, December 2017
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: 729461, 729464.