[Old news, but from NCEP's 1/12/19 @ 3:30am heavy Snow Discussion]
A COASTAL LOW WILL BEGIN TO DEVELOP ALONG THE CAROLINA COAST
SUNDAY MORNING. WITH DEEPER COLD AIR IN PLACE, WARM ADVECTION
SPREADING EAST OF THE MOUNTAINS FOLLOWED BY ADDITIONAL
PRECIPITATION WEST OF THE DEVELOPING LOW MAY CONTRIBUTE TO SOME
SIGNIFICANT SNOW/SLEET AMOUNTS FARTHER TO THE NORTH. A CONTINUED
TREND TOWARD HIGHER SNOW ALONG THE LOW LEVEL WARM FRONT OVER THE
CENTRAL MID-ATLANTIC IS SUPPORTED BY LOW DAY 1 WPC PROBABILITIES
FOR 8 INCHES THAT BLEED EAST FROM THE BLUE RIDGE OVER CENTRAL VA.