Another few inches of snow is possible by midday Saturday, on top of snowfall accumulations that neared or surpassed two feet across a swath of Baltimore, Carroll and Howard counties.

The National Weather Service forecasts 1-2 inches along the Interstate 95 corridor, with 2-4 inches to the north and west, areas that already got the heaviest snows Thursday. A winter weather advisory is in effect for Carroll, northern Baltimore and Harford counties from 10 p.m. Friday through 10 a.m. Saturday.

The latest storm brought 2 inches to Deale in Anne Arundel County by 7 a.m., according to the weather service. Other areas outside of the Baltimore region saw larger snowfalls by early morning, including an additional 10 inches in Frederick and parts of Montgomery County, and 7 inches in Hagerstown.

Some other forecasters suggest heavier accumulations for the Baltimore region.

Foot's Forecast is calling for an inch or two in areas close to the Chesapeake Bay, primarily Anne Arundel County and Southern Maryland; 2-4 inches along the I-95 corridor; and at least 3-4 inches in northern parts of Howard, Carroll, Baltimore and Harford counties.

Local meteorologist "Eric the Red" suggests a busted forecast is possible, pleasing the snow weary, but that a blanket of 1-4 inches is more likely.

Snow was expected to start late Friday night or early Saturday morning, continuing into late Saturday morning.

The highest accumulations in the region Thursday were reported in Glyndon, with 26 inches as of 9:30 p.m. Thursday, according to the National Weather Service. Other measurements included 24 inches in nearby Owings Mills, 24.8 inches in Westminster, 20.5 inches near Savage, 18.8 inches in Towson, 17.5 inches in Bel Air and 17.1 inches in Park Heights as of late Thursday night.

While officials had reported 12.3 inches of snowfall at Baltimore-Washington International Thurgood Marshall Airport from Wednesday night through Thursday morning, the official storm total was 11.5 inches. That meant the storm missed a chance at breaking into the top 10 snowiest days on record in Baltimore; 9.6 inches fell Thursday, and 1.9 inches fell late Wednesday. The record for Feb. 13 and the 10th-snowiest single-day storm here was 15.5 inches on that date in 1899.

Warming arrived by midday Friday, with temperatures surging to 44 degrees downtown and 40 degrees at BWI by 11 a.m. Highs at the airport were forecast in the lower 40s Friday afternoon, with 10-15 mph breezes make it feel like the mid-30s.

Cold temperatures were forecast for the weekend beyond the snow, with highs in the mid 30s and lows in the lower 20s Saturday and highs in the upper 20s and lows in the upper teens Sunday, with mostly cloudy skies.

The sun was forecast to return Monday, with clear skies for the first half of the day and highs in the mid-30s. A wintry mix of snow and rain was expected overnight Monday into Tuesday before a warm-up begins Tuesday, with highs in the mid-40s and then upper 40s Wednesday.

Temperatures could reach the mid-50s by next Friday and Saturday.

Baltimore Sun reporter Carrie Wells contributed to this report.