Another spell of frigid Arctic air dropped wind chills into the single digits early Monday morning, and is forecast to bring chances for 1-2 inches of snow Tuesday night and Wednesday morning.
Snow showers are forecast along a cold front expected to pass through the region. The National Weather Service is expecting the heaviest accumulations north and west of Baltimore.
A winter weather advisory is in effect from 4 p.m. Tuesday to 7 a.m. Wednesday in Carroll, northern Baltimore and northwestern Harford counties, along the Pennsylvania border. As much as 3 inches of snow could fall in those areas.
While lighter snow is expected along and east of Interstate 95, weather service meteorologists warned of a potentially slippery morning commute. The State Highway Administration was pre-treating major roads Monday ahead of the storm.
“If this threat does materialize during the Wednesday morning rush-hour, many roads could quickly turn icy,” the meteorologists wrote. “This could lead to dangerous traveling conditions, multiple accidents, and extensive delays.”
Pavement is frigid after days of cold. Temperatures fell to 13 degrees early Monday morning at Baltimore-Washington International Thurgood Marshall Airport, the region’s point of record. BWI posted a low of 14 degrees early Sunday morning, and temperatures peaked at 27 degrees in the afternoon, both about 10-15 degrees colder than normal.
The air has also been very dry. Dew points dropped to zero degrees Sunday afternoon, meaning that is how cold it would have to get for moisture in the air to condense (and freeze). The dew point rebounded into the teens Monday.
Baltimore health department Commissioner Leana Wen issued a “Code Blue” advisory from Saturday night through Monday morning. The declaration mobilizes efforts to shelter homeless and protect vulnerable populations from the cold.
There have been eight hypothermia-linked deaths in the city this winter, compared with 12 during all of last winter, health officials said.
Highs are forecast in the upper 20s Monday afternoon and in the upper 30s Tuesday before dropping back down to the mid-20s Wednesday.
Temperatures are forecast to moderate Thursday and Friday, with highs expected in the 40s.