|Snow persisted through the afternoon hours on the 8th across locations along and west of the Allegheny front.
Every event with a place to put it; 8 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 tracked through the Mid-Atlantic bringing a period of snow to most locations beginning on the evening of the 7th and lasting into the morning of the 8th.|Snow persisted through the afternoon hours on the 8th across locations along and west of the Allegheny front.
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 7, 5:57 PM EST, 3 hours 3 minutes earlier.
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</html>HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 404 PM EST THU JAN 7 2010 ANZ530>543-DCZ001-MDZ006-007-011-013-014-016>018-VAZ052>057- 081000- 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-NORTHERN BALTIMORE-HARFORD- SOUTHERN BALTIMORE-PRINCE GEORGES-ANNE ARUNDEL-CHARLES-ST. MARYS- CALVERT-PRINCE WILLIAM/MANASSAS/MANASSAS PARK-FAIRFAX- ARLINGTON/FALLS CHURCH/ALEXANDRIA-STAFFORD-SPOTSYLVANIA- KING GEORGE- 404 PM EST THU JAN 7 2010 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...THIS AFTERNOON AND TONIGHT A WINTER WEATHER ADVISORY FOR SNOW IS IN EFFECT FOR PORTIONS OF THE BALTIMORE-WASHINGTON METROPOLITAN AREA BEGINNING AT 11 PM. PLEASE REFER TO THE LATEST WINTER WEATHER STATEMENT /WSWLWX/ FOR DETAILS. LIGHT SNOW ACCUMULATIONS WILL BE POSSIBLE LATE TONIGHT FOR MUCH OF THE BALTIMORE COMMUTING AREA AND FOR PORTIONS OF THE WASHINGTON DC METROPOLITAN AREA. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY A WINTER WEATHER ADVISORY CONTINUES UNTIL 10 AM FOR PORTIONS OF THE BALTIMORE-WASHINGTON METROPOLITAN AREA. A SMALL CRAFT ADVISORY IS IN EFFECT FRIDAY AND FRIDAY NIGHT FOR THE TIDAL POTOMAC RIVER AND MARYLAND CHESAPEAKE BAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED THROUGH TONIGHT. HOWEVER... PLEASE RELAY ANY SNOW ACCUMULATIONS TONIGHT TO THE NATIONAL WEATHER SERVICE. MDZ003>005-009-010-501-502-VAZ021-025>031-036>042-050-051- WVZ050>055-501>504-081000- WASHINGTON-FREDERICK MD-CARROLL-MONTGOMERY-HOWARD- EXTREME WESTERN ALLEGANY-CENTRAL AND EASTERN ALLEGANY-HIGHLAND- AUGUSTA-ROCKINGHAM-SHENANDOAH-FREDERICK VA-PAGE-WARREN-CLARKE- NELSON-ALBEMARLE-GREENE-MADISON-RAPPAHANNOCK-FAUQUIER-LOUDOUN- ORANGE-CULPEPER-HAMPSHIRE-MORGAN-BERKELEY-JEFFERSON-PENDLETON- HARDY-WESTERN GRANT-EASTERN GRANT-WESTERN MINERAL-EASTERN MINERAL- 404 PM EST THU JAN 7 2010 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...THIS AFTERNOON AND TONIGHT A WINTER WEATHER ADVISORY IS IN EFFECT TONIGHT FOR THE CENTRAL AND NORTHERN SHENANDOAH VALLEY...THE POTOMAC AND ALLEGHENY HIGHLANDS... WESTERN AND NORTH-CENTRAL MARYLAND...MUCH OF THE BALTIMORE METRO AREA AND THE NORTHWESTERN SUBURBS OF WASHINGTON DC. PLEASE REFER TO THE LATEST WINTER WEATHER STATEMENT /WSWLWX/ FOR DETAILS. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM FOR MUCH OF THE BALTIMORE METRO AREA AND THE NORTHWESTERN SUBURBS OF WASHINGTON DC. SNOW SHOWERS WILL CONTINUE ALONG THE WESTERN SLOPES OF THE ALLEGHENY FRONT FRIDAY THROUGH SATURDAY. A WINTER WEATHER ADVISORY REMAINS IN EFFECT THROUGH FRIDAY FOR THIS AREA...AND A WINTER STORM WATCH IS IN EFFECT FRIDAY NIGHT...WHEN SNOWFALL RATES ARE EXPECTED TO INTENSIFY. 5 OR MORE INCHES OF ADDITIONAL ACCUMULATION IS POSSIBLE FRIDAY NIGHT. WIND CHILL VALUES BELOW ZERO ARE EXPECTED SATURDAY NIGHT IN THE POTOMAC HIGHLANDS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED THROUGH TONIGHT. HOWEVER... PLEASE RELAY ANY SNOW ACCUMULATIONS TONIGHT TO THE NATIONAL WEATHER SERVICE.
The national radar mosaic for the moment the first event began.
11 winter weather. Local standard time, as filed.
One to two inches of snow were reported throughout the county.
One to two inches of snow were reported throughout the county.
Around two inches of snow fell near Bluemont.
One to two inches of snow were received throughout the county.
Around one inch of snow was reported throughout the county.
One to two inches of snow was reported throughout the county.
Snowfall around two inches was reported in Big Meadows.
Snowfall around one inch was reported across many locations in Prince William County.
A total of 3.5 inches of snow was received near Massaponax.
Snowfall totals around two to three inches were reported across the county.
Snowfall totals up to two inches were reported across the county.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Virginia in 2010Every state in 2010This day in weather historyWarnings in Virginia, 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: 206214, 206215, 206216, 206217, 206218, 206219, 206220, 206221, 206222, 206224, 206225.