Here are the Latest Snowfall Reports (a bust with mainly sleet in Metro DC) from the NWS Database
As has been the trend this winter, the far northwest suburbs received a bit more snow but sleet even ruined the party for these areas as well with 7.2″ so far being the unofficial winner near Martinsburg, WV.
Winter Storm Warnings were downgraded to Winter Weather Advisories across the Metropolitan Area where some additional freezing drizzle or flurries are possible this evening.
A period of Freezing Rain is likely after 10pm from Fredericksburg across the Potomac river into southern (Charles, Calvert, St. Mary’s) and central (Annapolis) Maryland where additional ice accretion amounts of one-tenth to a quarter of an inch is possible. These are the locations where the Winter Storm Warnings continue through 6am Friday.
The image below, courtesy Pivotal Weather shows the future-cast radar from 8pm this evening through 5am Friday.
This has been one of the icier winters I can remember, I blame the subtropical ridge of high pressure which has been locked over the Atlantic ocean off of the southeast coastline all winter. Keep in mind that these high pressure ridges are typical of La Nina winters.